2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-1
September 24th (Thu.), <10:00-12:00>
Room 1

Surface charging when the water droplet dropped with acharge (Second report)○Yusuke FUTAMI and Hirofumi SHIMOKAWA
Kanagawa Institute of Technology

Abstract:
This report examined charging characteristics of the surface in dropping
water droplet which was charged on super-water-repellent agent (HIREC1100).
In the previous report, it was shown the surface was charged negatively, when
+200pC water droplet was dropped in the water-repellent surface. Is this report,
the similar experiment was carried out in water droplet which electric charge
which in bigger then +200pC. The surface was charged positively in case of the+300pC water droplet. And, the surface was charged negatively in case of+220pC. Surface density of charge in which the surface in not charge see to be
24~30μC / m2.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-2September 24th (Thu.), <10:00-12:00>
Room 1

Current waveform and electric charge in electrostatic
spraying(second report)
Kazumasa CHIKU，Hirofumi SHIMOKAWA
Kanagawa Institute of Technology

Abstract:
In this study, current waveform detected in the electrostatic atomizationby the nozzle was made to synchronize with the image of high-speed camera.
The change of the process according to the resistivity and the nozzle gauge ofthe electrostatic atomization phenomenon is observed from the synchronization,and the electrification process is revealed. The electric charge was calculated
from pulse current form in dependent on the value of applied voltage and thenozzle gauge. The electric charge when the nozzle 23G has changed irregularly.
After the droplets from the liquid thread breakup, the electric charge is increasedby the liquid surface or thread vibrates greatly.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-3September 24th (Thu.), <10:00-12:00>
Room 1

Flow Electrification between Pure Water and PFA with
Intermittent Flow
○Daichi Obata, Hiroshi Tasaka, Sunao Katsuki, Hidenori Akiyama
Graduate School of Science and Technology, Kumamoto University

Abstract:
Flow electrification phenomenon between pure water and PFA(PerFluoroAlkoxyethylene) tube was described in this paper. Essentially, purewater flowing in a PFA tube is positively electrified, but negative charges on thehead of the intermittent flow are observed in high Reynolds number conditions.
The amount of the negative charges depends on flow velocity, tube length, andinitial residual charges on the PFA tube. These results indicate that initialresidual charges on the PFA tube are collected by the head of water flow. In spiteof the relatively high conductivity of pure water, the collected negative charges
are not diffused because the two-phase flow condition is mixed and atomized,
which means insulated condition.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-4September 24th (Thu.), <10:00-12:00>
Room 1

Thermal Endurance of Multi-doped Nanocomposite
Polymeric Insulating Material Using Azo-benzoic Compound
Yoshiaki YAMANO
faculty of Education, Chiba University

Abstract:
Thermal endurance evaluation according to IEC 60216 series was
carried out on the multi-doped nano-composite polymeric insulating material
which we newly designed for high resistance to the electrical tree degradation.
The base material was LDPE, which was added with nano-particle of Al2O3 andazobenzoic compound. The size of the particle is about 50 nm in average. The
aging test was carried out using 3 chambers controlled at 85 ºC, 90 ºC and 95 ºC,
individually. The results indicated that RTE of the test sample was almost 40 %higher than that of LDPE, which indicates very high performance against thethermal degradation.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-5September 24th (Thu.), <10:00-12:00>
Room 1

Observation of Ultra-short Pulsed Discharge in Supercritical
Carbon Dioxide〇Miyuki OTA*, Tomohiro FURUSATO**, Takahiro IMAMICHI*, Takashi
SAKUGAWA*, Sunano KATSUKI*, and Hidenori AKIYAMA**Graduate School of science and technology, Kumamoto University, **Graduate
School of Engineering, Nagasaki University

Abstract:
This paper deals with pre-breakdown phenomena in supercritical carbon
dioxide (SC-CO2) with ultra-short positive pulsed voltages. Previously, we
studied a cylindrical shock wave propagated from a filament-like positive
streamer channel with a rise time of 90 ns, peak voltage of 60 kV and half-widthof 170 ns. For this study, we developed an ultra-short nanosecond pulse
generator with a rise time of 6.6 ns, peak voltage of 9 kV and half-width of 15 ns.
The voltage was applied to a needle-to-plane electrode in SC-CO2. The gap
length was set at approximately 320 µm. A filament-like streamer was observed
using the shadowgraph method as with our previous study.
Furthermore, unique images of shock waves were observed in which theshock wave appeared to propagate from the vicinity of the needle tip. In addition,a relatively weak shock waves along the streamer channel were also observed.
This data allowed us to infer that heating of the streamer vicinity of the needle tip
was enhanced compared with the streamer tip.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-6
September 24th (Thu.), <10:00-12:00>
Room 1

Measurement of infrared emission spectrometry ofO2(a1∆g) in atmospheric-pressure helium plasma jet○Yuki Inoue, Ryo Ono
Graduate School of Frontier Sciences, The University of Tokyo

Abstract:
The atmospheric-pressure helium plasma jet is an important device forplasma biomedical applications. We measured the density of singlet deltaoxygen O2(ɑ1∆g) in the plasma jet. O2(ɑ1∆g) is effective in the treatment ofblood sterilization and cancer. The measurement result shows the O2(ɑ1∆g)density under the high voltage electrode is approximately 2-8 ppm. The
O2(ɑ1∆g) density become maximum when the oxygen concentration is 0.2%
and the peak-to-peak voltage is 11kV.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aA-7
September 24th (Thu.), <10:00-12:00>
Room 1DEVELOPMENT OF LOW IMPEDANCE HIGH VOLTAGE
NANOSECOND PULSED POWER GENERATOR〇Satoru MATSUMOTO*, Shintaro KODAMA*, Douyan WANG**, Takao
NAMIHIRA** and Hidenori AKIYAMA *** Graduate School of Science and Technology, Kumamoto University , **Instituteof Pulsed Power Science

Abstract:
This study focuses on improving our nanosecond pulse generator bychanging insulation and dielectric medium and improving the configuration of the
spark gap switch (SGS). The insulation and dielectric medium were changed
from silicone oil to ethylene glycol, with εr referring to the dielectric constant. The
dielectric constant of silicone oil and ethylene glycol are 2.7 and 44. Therefore,characteristic impedance of silicone oil and ethylene glycol become about 50 Ω
and 12.5 Ω. The pulse width of silicone oil was extended from 5.0 ns to 20 ns in
ethylene glycol. Therefore, pulse width can be varied by changing the length of
the triaxial Blumlein line, with the length of the line 500 mm under the previous
configuration but 125 mm using the reconfigured generator. The previous SGS
path was longer than the one we have currently. Therefore, due to inductanceinside the switch, we developed a low inductance new SGS. It is developed fivegenerators by combining the three previous factors. The output current ofGenerator 5 is about 2.6 times that of Generator 1. Generator 5 has the highest
power, making it the best generator.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pA-1
September 24th (Thu.), <15:45-17:45>
Room 1

Effect of Discharge Conditions on Inception Electric Field
Strength of Streamer in Water
〇Takehiko SATO*, Hidemasa FUJITA**, Seiji KANAZAWA***, Kiyonobu
OHTANI*, Atsuki KOMIYA* and Toshiro KANEKO*****,**,**** Tohoku University, ***Oita University

Abstract:
Effects of gap distance, capacitance, and water conductivity on the
inception electric field strength of a primary streamer and a secondary streamer
in water were investigated in the case of a single-shot pulsed positive voltage
with a duration of 10 ?s. It was clarified that the inception electric field strength
was not effected by discharge conditions, and threshold electric field streangthfor the inceptions of a primary streamer is greater than 23 MV/cm and and forthat of a secondary streamer is greater than 34 MV/cm.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pA-2September 24th (Thu.), <15:45-17:45>
Room 1

Influence of Conductivity on DC Negative Corona Discharge
from a Water Droplet
Takuya Nakajima
Graduated School of Science and Engineering, Yamagata University

Abstract:
DC corona discharge from a water droplet formed at a capillary electrodeis accompanied with periodical formation and disruption of a Taylor cone.
Thus, corona discharge from a water droplet occurs intermittently withregular interval. Formation of a cone and charge transfer in a droplet might berelated to ion mobility in a droplet. In this study, to confirm the influence of the
conductivity of a water droplet on the negative corona discharge, the magnitude
of corona current and the time variation of the droplet height were investigated.
Conductivity of a water droplet was adjusted by a concentration of HNO3 from
0.48 to 48mS/cm. The higher conductivity of a droplet, the larger corona current
flows. However, the conductivity affects little the cone formation of a water
droplet. It takes more time for a larger water droplet to return to the lower
position of droplet. As a result, pulse trains corona discharge continues with arelatively longer duration.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pA-3September 24th (Thu.), <15:45-17:45>
Room 1

Basic Experiment of Rod-to-Water Electrode Discharge
Using Inverter Neon Transformer〇Naoya HAYASHI, Itaru FUJITA, Sayo OKUDA, Toru HARIGAI, Yoshiyuki
SUDA, Hirofumi TAKIKAWA
Toyohashi University of Technology

Abstract:
There are nitrate ions as nutrients necessary for the growth of plants.
Nitrate ions can be generated in water by discharge. In this study, rod-to-water
discharge experiment that places the ground electrode in the water waspresented using an inverter neon transformer.
Unstable discharge appeared immediately at the beginning of discharge.
After the discharge for 30 s, discharge was stable. The pH and nitrate ion
concentration in water after discharge was increased with increasing ofdischarge duration.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pA-4September 24th (Thu.), <15:45-17:45>
Room 1Analysis of compositions of the ions generated byatmospheric pressure helium plasma〇Kenkichi NAGATO, Mizuki ASAE and Takahito SETO
National Institute of Technology, Kochi College

Abstract:
Chemical compositions of the ions generated by atmospheric pressure
helium plasma were investigated using an atmospheric pressure ionization mass
spectrometry (API-MS). The plasma generator used in this experiment wascomposed by a union-tee, a quartz glass tube and a stainless steel rod. In thenegative ion mass spectrum with a distance between the glass tube tip and thesampling orifice being 5 mm, several ion species were observed. The observed
ions include O－, OH－, O2－, O3－, CO3－, HCO3－ and HCO4－. Most ofthese ions formed hydrated cluster ions and the ions of O2－(H2O)n were themost abundant in the spectrum. The spectrum changed significantly by changing
the distance between the glass tube tip and the sampling orifice to 10 mm. The
peak of CO3－ became the most intense peak and the ions of O2－and HCO4
－ decline, which was probably due to the ion-molecule reactions withsurrounding molecules.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pA-5September 24th (Thu.), <15:45-17:45>
Room 1

Observation of streamer discharge under high temperatures〇Taku KAMAKURA and Ryo ONO
The Univ. of Tokyo

Abstract:
Observation of streamer discharge under high temperatures Departmentof Advanced Energy, The University of Tokyo Kamakura Taku Pulsed positive
streamer discharge in a point-to-plane gap is observed under high temperatures(300-1200 K) and compared with various applied voltages (12-30 kV). An ICCD
camera is used for the optical measurements of streamer. The rises intemperature and applied voltage increase the reduced electric field E/n. The
results show that the rises in temperature and applied voltage increase thepropagation velocity of primary streamer and the length of secondary streamerin similar ways, while they lead to different shape of streamer (thickness,branching, etc.).

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pA-6
September 24th (Thu.), <15:45-17:45>
Room 1

Generation and Characterization of Mist-Plasma Using
Atmospheric Pressure Glow Discharge○Tomoyuki TANAKA
Graduate School of Science and Engineering, Tokyo Metropolitan University

Abstract:
In this study we constructed mist-plasma experimental system using theatmospheric pressure DC glow discharge. We carried out the characterization of
the mist-plasma by the measurements of optical emission spectroscopy anddroplet diameter.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-1
September 24th (Thu.), <10:00-12:00>
Room 2

Study on the discharge electrode of an electrostatic
precipitator〇Yoshiyuki KISANUKI*, Yuji MAKISHIMA*, Shinjirou KATSUSHIMA*,Kazunori
TAKASHIMA** and Akira MIZUNO**AMANO Co., Ltd*, Toyohashi University of Technology**

Abstract:
By adopting ISO14000 series etc., improvement of the working
environment in the factory has become an important issue. The authors haveverified the effectiveness of the discharge electrode against sedimentation of theoil mist at its tip. The electrodes used in the experiment are; A) needle?plate, B)
needle-circular hole, C) protruding needle-circular hole.
In order to confirm the influence of the sediment attached on the needle
tip, we performed simplified measurement of ionic wind, verification of thecharging efficiency and the field experiment. From the results of ionic windmeasurement and the field experiment, it was found to be effective to direct theneedle tips in the same direction as the main gas flow. From the verification of
the charging efficiency and the field experiment, the shape C) , newly invented
by us, of the protruding needle-circular hole was the most effective as adischarge electrode for an electrostatic precipitator to collect fine suspended
particles.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-2September 24th (Thu.), <10:00-12:00>
Room 2

Electrostatic Precipitator using the weak Corona Discharge
generated by Carbon Fiber Flocking Electrodes
Atsushi KATATANI*, 〇Hiroshi HOSONO**, Hikaru
MURATA**, Hiroshi YAHATA** and Akira MIZUNO***
Panasonic Environmental Systems & Engineering Co., Ltd*，〇PanasonicEcology Systems Co., Ltd**，Toyohashi University of Technology***

Abstract:
The authors have been studying the electrostatic precipitator (ESP)
which can charge particles without using corona discharge to collect particles
with Coulomb’s force in strong electric field. In this method, we have tried to use“induction charging”. DC high-voltage lower than corona-start-voltage is applied
to electrostatic-flocked electrodes with carbon fibers. Particles are attracted to
the fibers due to gradient force. Then, particles are induction-charged just as
particles that have attached to the fibers are re-entrained. Because of thestrengthened electric field by converged electric-force-lines, the particles should
acquire larger induction charge compared to the case of plate electrodes without
flocked fibers. After these particles detach from the fibers, they are collected by
the following parallel plate electrode assembly. Even without corona discharge,
the experimental results in the last study showed that a certain value of particle
collection efficiency was observed. The observed collection efficiency was stable
for smaller particles (from 0.3 to 1.0 μm), however, was unstable for larger
particles (from 1.0 to 5.0 μm). In this study, when a weak corona discharge was
generated in the flocked electrodes with carbon fibers, the collection efficiency of
80% or higher, equivalent to conventional ESPs, was obtained in all the diameter
range using only 10% of the electric power consumption compared withconventional ESPs.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-3September 24th (Thu.), <10:00-12:00>
Room 2

Basic Characteristics of Ionic Wind Devices Prepared by a
3D Printer○Wataru IMAGAWA*, Masataka KAI*, Shouhei MATSUNARI*, Shuichi
AKAMINE*,
Ryuta ICHIKI*, Seiji KANAZAWA*, Koji KANAZAWA*** Department of Electrical and Electronic Engineering, Oita University** Department of Aerospace Systems Engineering, Sojo University

Abstract:
The corona discharges are widely used in many industrial applications
such as gas cleaning, particle precipitation, and gas flow control. Essentially, thecorona discharge apparatus consists of the metallic electrodes and those
supporting insulators. The insulating parts are usually made of plastic, ceramics
or glass. Therefore there is a limit for the design and fabrication of the apparatus.
We have introduced 3D printing technology into the development of non-thermal
plasma reactors. In this study, ionic wind devices based on the dc corona
discharge is studied. Except for the electrodes, the ionic wind devices wereprepared by using a 3D printer. The electrode of corona discharge is aneedle-to-mesh configuration. The performance of the ionic wind devices wasevaluated with respect to the gas flow velocity and its spatial distribution.
Moreover, we examined the effect of the array by the multi-devices. As theadvantage of the array, it is possible to increase the ionic win!
d velocity and to control the air flow distribution widely.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-4September 24th (Thu.), <10:00-12:00>
Room 2Development of an ion wind use humidification system○Takahiro SAKAI*,Yasutaka INANAGA*,Akira MORIKAWA*,Keita
SAKAI*,Tasuku IZUTANI**Mitsubishi Electric Co. Advanced Technology R&D Center

Abstract:
We examined vaporization-type humidification performance control
characteristics, and we paid our attention about the humidification method thatused an ion style together with a filter. As a result, the wind velocity to water
absorptive porous metal increased by injection electric discharge electricity andunderstood that the humidification performance improved. In this way
understood that control of the quantity of humidification was possible.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-5September 24th (Thu.), <10:00-12:00>
Room 2

Decomposition of the Water Insoluble Odor Using Corona
Discharge〇Chisaki MATSUMOTO，Nozomi HARASAWA，Josuke HONMA，Sayaka
MITSUI, Azuchi HARANO
Graduate School of Science and Technology, Gunma University

Abstract:
This presentation describes the bench scale experiments ofdecomposition of the water insoluble odor (the flow rate of odor gas about 1
m3/min) using corona discharge. The odor concentration was adjusted by the
bubbling of ethyl mercaptan solution diluted the excess ethanol into cooling
container. The concentration of ethyl mercaptan was successfully controlled by
the flow rate of bubbling gas (N2) and it enabled a stable experiment for a long
period of time. The decomposition of ethyl mercaptan was accomplished by thecorona discharge reactor consisted of four stainless wires and achieved the 50%
conversion at an initial concentration of 79ppb and electric power of 15W.
Furthermore, the experimental results suggested that the most of ethyl
mercaptan directly was due to decomposition into corona plasma not oxidationof the ozone produced by corona discharge.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-6
September 24th (Thu.), <10:00-12:00>
Room 2

Removal of High Concentration N2O Anesthetic Gas Using
Nonthermal Plasma and Adsorbent〇Tomoyuki KUROKI*, Toshiaki YAMAMOTO*, Shunsuke NISHII*, Masayuki
AKITA**, and Masaaki OKUBO** Department of Mechanical Engineering, Osaka Prefecture University, **Enomoto BeA Co., Ltd.

Abstract:
The high concentration of N2O removal system was investigated using
nonthermal plasma combined with adsorbent. N2O gas that simulates the waste
gas from anesthetic equipment used for operation rooms was decomposedusing the surface discharge plasma reactor. When N2O was decomposed, NOx
was generated. The generated NOx was adsorbed by NOx adsorbent. As aresult, 66% of N2O decomposition efficiency was achieved with 12.8% of N2O,
the flow rate of 1.1 L/min, and the input power to the plasma reactor of 375 W.
Furthermore, 0.4% of NO and 1.0% of NO2 were generated upon N2O
decomposition; both of them were removed using adsorbent. The adsorbed NOx
was able to be decomposed with nitrogen plasma. It was demonstrated that highconcentration of N2O removal system can be accomplished using nonthermal
plasma combined with adsorbent process.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aB-7
September 24th (Thu.), <10:00-12:00>
Room 2

Study of hexadecane removal using atmosphericmicroplasma electrodekazuo Shimizu
Organization for innovation and Social Collaboration, Shizuoka University

Abstract:
In recent years, the deterioration of IAQ (Indoor Air Quality) became a
big concern. Because indoors is the place where we spend most of our life, IAQ
is an important factor to be considered for a comfortable and healthy living. In
this study, we evaluated by-product and deodorization process of hexadecane insmall and large capacity box by using microplasma electrode. Both small andlarge capacity deodorization process could reduce hexadecane each of 90 %and 70 %, while CO and N2O were generated as byproduct.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-1
September 24th (Thu.), <15:45-17:45>
Room 2

Importance of Liquid Flow Induced by Plasma on Water
Treatment○Nozomi TAKEUCHITokyo Institute of Technology

Abstract:
The effect of liquid flow on water treatment using a plasma generated
over a solution was investigated using a two-dimensional numerical simulation ofpulsed argon plasma that was generated between a needle electrode and asolution surface. The behavior of the reactive species generated by the plasma
was calculated by considering electron-impact reactions, gas- and liquid-phasereactions, liquid flow, and mass transfer, assuming a gas–liquid equilibrium on
the interface and flux continuity through the interface. The numerical results
indicated that even a weak liquid flow could drastically change the liquid-phasechemistry.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-2September 24th (Thu.), <15:45-17:45>
Room 2

Pilot-scale Experiment of Semi-dry type Exhaust Gas
Treatment for Glass Manufacturing System Using a
Plasma-chemical Hybrid Process○Hashira YAMAMOTO*,**，Tomoyuki KUROKI*，Hidekatsu FUJISHIMA* andMasaaki OKUBO**Department of Mechanical Engineering, Osaka Prefecture University, **Nihon
Yamamura Glass Co., Ltd.

Abstract:
A pilot-scale experiment of semi-dry type simultaneous removal of NOx
and SOx using a plasma-chemical hybrid process (PCHP) is carried out on an
exhaust gas in a glass manufacturing system. The exhaust gas is produced by
the combustion of fuel for raw glass materials and contains both NOx and SOx.
NO is oxidized to water-soluble NO2 with the plasma induced ozone gas.
Na2SO3 is produced as a by-product of the de-SOx process using NaOH
solution at gas cooling area of 150°C or less. NO2 is reduced to N2 using
Na2SO3. After the semi-dry state, the Na2SO3 is dried by the heat of exhaustgas, and produces Na2SO4. NO oxidation efficiency of more than 75% isachieved. NO and SOx removal efficiencies are 28% and 63%, respectively.
Furthermore, de-NOx in bag filter is discussed for the injection of NaHCO3. Dueto the synergistic effect of ozone and NaHCO3, and NOx removal efficiency of
45% is obtained. Through this experiment, it is confirmed that this simultaneousde-NOx and de-SOx technology using semi-dry type PCHP is highly effective
and promising for exhaust gas treatment in glass manufacturing system.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-3September 24th (Thu.), <15:45-17:45>
Room 2

Basic Treatment Property of Persistent Organic Pollutants in
Wastewater Splay by Nanoseconds Pulsed Discharge in Air〇Shintaro KODAMA*, Satoru MATSUMOTO*, Douyan WANG**, Takao
NAMIHIRA** and Hidenori AKIYAMA*** Graduate School of Science and Technology, Kumamoto university, **Instituteof Pulsed Power Science

Abstract:
Persistent organic pollutants (POPs) are bioaccumulative andenvironmentally persistent substances. POPs cannot be decomposed byconventional water treatments. For this reason, a new treatment method isrequired. Nano-seconds (ns) pulsed discharges enable higher energy
efficiencies of plasma processing. Its advantages have been already performed
at gas phase treatment such as NOx treatment and ozone generation. On theother hand, there are few reports on the water treatment using ns discharge
plasmas. In this study, we tried to decompose the organic pollutants using ns
discharge method by spraying wastewater into gas phase plasma region. The
discharge reactor was coaxial cylindrical geometry, and the treated wastewater
was circulated and continuously treated in the reactor. The time course of pH
and concentration of Non-Purgeable Organic Carbon (NPOC) in the wastewater
were evaluated at several treatments.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-4September 24th (Thu.), <15:45-17:45>
Room 2

Plasma assisted catalytic oxidation of low concentration
carbon monoxide in air
・○Toyohashi University of Technology
Dept. of Environmental and Life Sciences, Toyohashi University of Technology

Abstract:
Oxidation of low concentration carbon monoxide (CO) using aplasma-catalyst hybrid reactor at low temperature was carried out. A packed bed
discharge reactor was constructed with three types of dielectric pellets, γ-Al2O3 ,Ru-Al2O3 and Ag-ZSM5. As a result, the reactor with γ-Al2O3 could not remove
CO with or without using the discharge plasma. On the other hand, the reactor
with Ru-Al2O3 showed 75% of CO removal at room temperature. In addition,
90% of CO was removed under the condition of 60ºC and 0% relative humidity
with both of Ru-Al2O3 and Ag-ZSM5. Furthermore, in the case of Ag-ZSM5,
NO2 production was smaller.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-5September 24th (Thu.), <15:45-17:45>
Room 2Development of Ultra High Density Ozone Generation
Technology○Yoko MATSUURA, Yusuke NAKAGAWA, Noboru WADA and Yasutaka
INANAGA
Mitsubishi Electric Corporation, Advanced Technology R&D Center

Abstract:
The maximum ozone density of existing ozone generator is about 400
g/Nm3, while further improvement in the ozone generation density can develop
various applications in the fields of semiconductor manufacturing and water
treatment. Mitsubishi Electric has developed the highly-efficient ozone generator
by producing precise narrow discharge gap. Applying the highly-efficient ozone
generator to the pressure-swing ozone concentration system enables the large
supply rate of the ultrahigh density concentrated ozone at low running cost.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-6
September 24th (Thu.), <15:45-17:45>
Room 2Ammonia generation using discharge plasma and catalyst
from diesel exhaust gas○Ryo YOSHIDA, Hirofumi KURITA, Kazunori TAKASHIMA, and Akira MIZUNO
Department of Environmental and Life Sciences, Toyohashi University ofTechnology, Japan

Abstract:
Ammonia (NH3) generation from N2,H2O,CO,NO2 was experimentallystudied using a simple plasma-catalyst hybrid reactor. This is intended to be analternative to urea hydrolysis used in urea-SCR deNOx system for diesel
engines. A packed bed type plasma reactor was used to generate intensedischarge plasma on the catalyst pellet. Pellets of Pt, Rh, Pt-Rh, and Pd
supported by Al2O3 were examined as catalyst for NH3 generation.
Effect of carbon monoxide (CO) addition was examined to improveenergy efficiency. Ammonia was generated from NO2 and H2O byplasma-catalytic reaction with CO and NO2 addition. Pt-Rh resulted in very highNH3 generation compared with other catalysts. Maximum energy efficiency forNH3 generation in this method was 4.0 g/kWh.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-7
September 24th (Thu.), <15:45-17:45>
Room 2

Pulsed Dry Methane Reforming in DBD-Catalyst Hybrid
reaction and Reaction Mechanisms
Keishiro TAMURA, Seigo KAMESHIMA, Yutaro ISHIBASHI, Ryo MIZUKAMI,
Tomohiro NOZAKI
Department of Mechanical Sciences and Engineering, Tokyo Institute ofTechnology

Abstract:
Dry methane reforming in dielectric barrier discharge and catalyst hybrid
reactor was investigated. Optical emission spectroscopy was employed forbetter understanding of reaction mechanism for enhanced CH4 and CO2
conversion as well as carbon removal reaction. Strong emission from C2molecules, which is known as C2 high pressure Swan system, was observed
when CO2 + “C(ad) or NiC” = CO + CO becomes dominant reaction. Excited C2
molecules were produced selectively via vibrationally excited CO. Because CO
is produced from adsorbed carbon or nickel carbide, emission from C2 highpressure Swan system becomes a good indication of surface reaction
enhancement by DBD. Time dependent change of gas composition andemission profiles of CO and C2 were correlated and detailed reaction pathways
is discussed.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-1
September 24th (Thu.), <10:00-12:00>
Room 3

Analysis of bacterium isolated from used soluble cutting oil
and it’s tolerance toward pulsed-discharge plasma treatment
Makoto HIROSAWA, Takanori TANINO, Kouhei MAKITA, Takayuki OHSHIMA
Graduated School of Science and Technology, Gunma University

Abstract:
In this study, we focused on a bacterium that was isolated from usedsoluble cutting oil after pulsed-discharge plasma treatment. A bacteria
identification analysis based on the 16s rRNA coding sequence region
concluded that the bacterium is Bacillus barbaricus with 98.30% homology.
Isolated B. barbaricus was cultivated both in liquid medium for 4, 22 h and on
agar plate for 1 week. The former condition could allow B. barbaricus to bevegetative cell form and the later condition could allow it to form spore. All cells
showed tolerance toward puled-discharge plasma inactivation treatment indistilled water. We also investigated tolerances of B. barbaricus toward heat andozone inactivation treatments. Contrary to our expectations, it didn’t show
significant tolerances toward heat and ozone. From these results, B. barbaricus
possesses only significant tolerance toward pulsed-discharge plasma
inactivation treatment.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-2September 24th (Thu.), <10:00-12:00>
Room 3The effect of gas flow rate and composition in nanosecond
pulsed plasma irradiation on mouse melanoma cell
○Yuki Shirakawa*, Kazue Mizuno** and Ryo Ono*
*Department of Advanced Energy, The University of Tokyo, ** Department ofMaterials Engineering, The University of Tokyo

Abstract:
The relation between survival rate of mouse melanoma cell treated withnanosecond pulsed streamer discharge and gas flow rate and composition areinvestigated. Using N2, low gas flow rate induces more cell death. Using N2/O2
mixed gas, O2 concentration has little effect on cell survival rate. The results
imply that in our experiment condition some reactive species derived from water
vapor such as OH are more effective for mouse melanoma cell death thanreactive species derived from O2 such as O and NO.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-3September 24th (Thu.), <10:00-12:00>
Room 3Fundamental study of a novel gene transfection of
mammalian cells by water-in-oil droplet manipulation in anelectric fieldYasuhiro TAKAO
Department of Environmental and Life Sciences, Toyohashi University ofTechnology

Abstract:
We developed a novel gene transfection method, water-in-oil (W/O)
droplet electroporation, using dielectric oil and a liquid droplet containing living
cells and transgene DNA. This method is based on water-in-oil droplet
manipulation by using electrostatic force. When a water droplet is placed
between a pair of electrodes, a reciprocal motion is made by applying a DC
electric field. This droplet motion is brought about as follows. First, a droplet iscarried to one electrode by Coulomb force, possibly due to electrostaticinduction. When the droplet makes contact with the electrode, droplet is charged
with the same polarity as the electrode. The droplet then moves to the otherelectrode and the same process occurs repeatedly. Furthermore, more intenseelectric field can induce droplet deformation and it leads instantaneous shortcircuit via the droplet. Small holes could be made in the cell membrane during
the short circuit, and genes could be introduced into the cells. We haveinvestigated a gene transfection using the droplet containing mammalian culture
cells (HEK293 cell) and foreign plasmid DNA. Viability and transfection levelmeasured 24 hours after the voltage application under various applied condition
were investigated.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-4September 24th (Thu.), <10:00-12:00>
Room 3

Plasma Irradiation to Subcutaneous Cancer Tumor on Miceand Verification of Immune System○Kenta YONETAMARI*, Yuki SHIRAKAWA*, Kazue MIZUNO** and Ryo ONO*
*Department of Advanced Energy, The University of Tokyo,**Department of
Bioengineering, The University of Tokyo

Abstract:
Cancer treatment using plasma has intensively studied these days. In
this study, mouse melanoma cells were injected subcutan eously on mice andtreated using nanosecond pulsed streamer discharge. Two types of mice wereused, CD2F1 and Balb/c nu/nu.
The former has immunity and the latter lacks immunity. It was shown thatthe treatment of CD2F1 is effective, while that of Balb/c nu/nu is not effective. It
suggests that the plasma treatment might stimulate the immune system in micethat is effec tive for cancer treatment.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-5September 24th (Thu.), <10:00-12:00>
Room 3

Verification of Sterilization Effect by OH radicals Using
Vacuum Ultraviolet Light Method○Kenta YONETAMARI and Ryo ONO
The University of Tokyo

Abstract:
Recently, plasma medicine is one of the most attracting fields becauseradicals in plasma have the therapeutic and sterilization effects. However, themechanism is not revealed so plasma medicine is not yet to use. In this study,
sterilization experiment of bacillus atrophaeus (ATCC9372) was performed using
VUV method which is developed in our previous work. As a result, sterilization
effect was observed when wet He and He/O2 was used as the working gas. This
result indicates that OH radical kills bacteria.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-6
September 24th (Thu.), <10:00-12:00>
Room 3

Examination of Cell Separation Condition Using the Inclined
Comb-shaped Dielectrophoretic Electrodes○Masayo TAKANO, Takayuki ITOI, Takaharu ENJOJI and Yoshikazu
WAKIZAKAAFI Corporation

Abstract:
The importance of cell separation techniques are increasing with
development of biopharmaceutical and regenerative medicine. Dielectrophoresis(DEP) is a noninvasive method for cell separation without labeling the cells. We
had developed the DEP devices with the inclined comb-shaped electrodes forcell separation, and examined the effect of micro-gap size between electrodes,
flow rate and AC voltage on cell separation efficiency. Furthermore, the viable
and the non-viable cells were separated, and also one cell line was separated
from mixture of two cell lines by the DEP device.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24aC-7
September 24th (Thu.), <10:00-12:00>
Room 3

Study of dielectrophoretic property of DNA-labeled dielectric
microbeads for DNA detection
Michihiko Nakano, Hiromichi Kasahara, Zhenhao Ding, ○Junya Suehiro
Department of Electrical Engineering, Kyushu University

Abstract:
New DNA detection method using dielectrophoresis (DEP) of dielectric
microbeads was proposed. The method is based on dynamic change of
microbeads DEP by attaching DNA. Dielectric microbeads having natively
negative DEP property become behaving positive DEP when they are labeledwith DNA. The DNA-labeled microbeads can be collected on a microelectrode bypositive DEP. DEP collection of the DNA-labeled microbeads causes the
impedance change of the microelectrode. By measuring the impedance change,
DNA-labeled microbeads are detected. The aim of this study is to investigate
influence of DNA on the dielectrophoretic property of the dielectric microbeads.
The crossover frequency of DEP and zeta potential of the microbeads were
investigated. Three kinds of DNA and two kinds of microbeads were used. From
the results, it was suggested that not only the conductance of DNA but also
permittivity of DNA could affect DEP of the microbeads. Moreover, it isdemonstrated that quantitative detection of DNA.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-1
September 24th (Thu.), <15:45-17:45>
Room 3A study on Verification of Impurity Density Spatial
Distribution in Silicon Wafer through Surface Potential
Measurement with Electrostatic Force Microscope
Daichi Satou*，Haruyuki Miyano***，○Hiroaki Takatsu*，Jumpei Higashio**，
Toshio Uehara**，Yoshihiro Takahashi***，Yoshito Ashizawa***，Arata
Tsukamoto***，Katsuji Nakagawa***
Nihon University* ***，Trek Japan Co.,Ltd**

Abstract:
Electrostatic force microscope (EFM) we developed can measure
voltage on surface (VS) up to 1 kV in air with extremely high sensitivity (~20 mV)
as well as high spatial resolution (~10 μm). We applied the EFM to measure
impurity distribution. It is revealed that the measured VS showed opposite
voltage polarity depending on n- or p-type dopant. The VS should correspondwork function difference between sensor metal and Si substrate to keep
flat-band condition of Si substrate. We observed density distribution of impurities
with EFM by this method, and discussed the results.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-2September 24th (Thu.), <15:45-17:45>
Room 3

Study on N2 plasma processing to TiO２Photocatalyst○Shota YAZAWA, Kiyozumi NIIZUMA, Yusuke KUDO
College of Industrial Technology, Nihon University

Abstract:
A photocatalyst is attracting widespread attention because it works
semipermanently under light irradiation. A photocatalyst has usefulcharacteristics such as an oxidative decomposition and a super-hydrophilicity.
However, TiO2 photocatalysts which are often used can be activated only byultraviolet rays. The ultraviolet rays for photoactivation of TiO2 are included
nearly zero in indoor lights. If a photocatalyst can be activated with visible light
as well as ultraviolet light, a photocatalyst can be used not only outdoors but also
indoors. N-doped TiO2 is one of visible light responsible photocatalysts. We tried
to produce N-doped TiO2 with N2-plasma processing. We have focused on thesample temperature under an N2-plasma processing. In this study, the N2
plasma processing time to TiO2 was changed.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-3September 24th (Thu.), <15:45-17:45>
Room 3

Improvements of 150 .C annealing technique fordye-sensitized solar cells
Shungo Zen
The University of Tokyo Department of Advanced Energy

Abstract:
Dye-sensitized solar cells (DSSCs) require annealing of TiO2
photoelectrodes at 450C to 550C. However, high-temperature annealing isunfavorable because it limits the use of materials that cannot withstand hightemperatures. In previous papers, we proposed a 150C annealing technique ofTiO2 photoelectrodes to reduce the annealing temperature from 450C to 150C
using a conventional TiO2 paste that contains organic binders. Using ourtechnique, η of 4-μm-thick TiO2 film is achieved approximately 110% comparedwith that of 500C annealing and η of 11-μm-thick TiO2 film DSSCs is lower thanthat of500C annealed.
In this paper, we improve the 150C annealing technique by heating
Dielectric Barrier Discharge (DBD) treatment device.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-4September 24th (Thu.), <15:45-17:45>
Room 3Synthesis and Shear Piezoelectricity of Optically Active
Polysuccinimide.
〇Kazuhiro TANIMOTO*,**, Shota SAIHARA*, Yu ADACHI*, Yuhei HARADA*
and Yoshiro TAJITSU**Graduate School of Engineering, Kansai University **Mitsui Chemicals, Inc.

Abstract:
Optically active crystalline polymers show shear piezoelectricity due totheir asymmetric crystal structure. Polysuccinimide (PSI) is minimum structure ofan optically active polyimide and we reported that optically active PSI shows
shear piezoelectricity. In this study, we synthesized optically active
polysuccinimides (PSI) and evaluated their shear piezoelectricity. As a result, themaximum value of shear piezoelectric d constant was 1.56 pC/N. This value ishigher than many biopolymers and polypeptides.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-5September 24th (Thu.), <15:45-17:45>
Room 3

Numerical Analysis on Body Force Characteristic ofDual-Grounded Tri-Electrode Plasma Actuator〇Asa Nakano, Hiroyuki Nishida, Masaki Tamura
Tokyo University of Agriculture and Technology

Abstract:
In this research, we focus on dielectric barrier discharge plasma actuator(DBDPA).
DBDPA is an active flow control device and when high frequency AC
voltage is applied to it, it generates body force brings in inducted flow. However,this induced flow is too weak to install on aerodynamic bodies in a high-speed
flow so we have suggested Dual-Grounded Tri-Electrode plasma actuator(DGTEPA) which makes stronger thrust with higher efficiency. In this study, we
compare the body force of DBDPA and DGTEPA for different applied voltage bya plasma simulation. First it is confirmed that the simulation results are inqualitatively agreement with the experiments from the viewpoint of plasma
distribution. Next we discuss the voltage characteristics of the body force andbody force - power ratio. As a result of simulation, we found DGTEPA has
smaller time averaged body force with worse efficiency than DBDPA. Although
the quantitative discrepancy exists, it is expected that the simulation can
reproduce the qualitative trends.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-6
September 24th (Thu.), <15:45-17:45>
Room 3

Production of a shock wave by a nanosecond-pulse
discharge and the effects on the flow control○Atsushi Komuro, Shuto Matsuyuki, Kaiki Konno, Kazunori Takahashi, Akira
Ando
Tohoku University

Abstract:
Flow control technique driven by the nanoseconds-pulse discharge wasinvestigated. As a fundamental experiment, we observed a shock wave
generated by the nanoseconds-pulse discharge by the schlieren visualization. A
complex pattern of quasi-planar and spherical compression waves wasobserved. From the schlieren imaging, shock wave intensity was evaluated with
its contrast. The results showed that shock wave intensity increases as a pulse
peak voltage increases and a rising time is lengthened.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pC-7
September 24th (Thu.), <15:45-17:45>
Room 3

Experimental Estimation of Electrohydrodynamic ForceonDBD Plasma Actuator and Its Validation
Hiroyuki Nishida
Tokyo University of Agriculture and Technology

Abstract:
To experimentally estimate the EHD force field generated by a DBD
plasma actuator (DBDPA) using PIV measurement, some techniques have been
proposed by several researchers. In those methods, the EHD force is estimatedbased on the Navier-Stokes equations under some assumptions.
Because of the assumptions, it is important to validate the result. In thisstudy, the EHD force field is estimated by three different methods, and thecomparison of these results is conducted. From the viewpoint of thetime-averaged body force field, the result with the assumption of quasi-steadybody force is different from other results with neglecting the pressure gradient or
the vertical EHD force. From the view point of the time-varying body force, theresults under the assumption of no-pressure gradient and no-vertical EHD force
are similar. However both results have some estimation errors; a negative bodyforce appears during no-discharge period.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aA-1
September 25th (Fri.), <10:00-10:45>
Room 1Minimally-Invasive Electrically-induced Bubble Injector for
Patterning to Variety of Biological Materials
Kazuki Takahashi,Yoko Yamanishi
Shibaura Institute of Technology，JST PRESTO

Abstract:
We have successfully developed minimally-invasive bubble injector
which is applicable for variety of biological materials with various hardness. The
novelty is that the minimally-invasiveness of injection whose resolution is in therange of 10 - 200 μm, and hence cellular-scale injection and two-dimensional
patterning injection can be fulfilled. The novelty of the present techniques are (1)unique perforation techniques by means of cavitation phenomena using
high-speed bubbles cavitation, (2) powerful but minimally invasive precise
perforation to wide range of biological materials, (3) high versatility thatbubble-injector can be used under water and in the air. The developed injector
can be used for wide range of biomedical study, especially in gene engineering.
This technique has advantages over the conventional electroporation or
ultrasound operation in terms of localization of injection and ability oftransportation of material.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aA-2September 25th (Fri.), <10:00-10:45>
Room 1

A Study of Mechanism of High Piezoelectric Performance
Poly (lactic acid) Film Manufactured by Solid-State
Extrusion〇Mitsunobu Yoshida*,**, Yoshiro Tajitsu**○*Mitsui Chemicals Inc., **Graduate School of Engineering, Kansai University

Abstract:
A piezoelectric film of poly (L-lactic acid) (PLLA) has no pyroelectricity
and has a high voltage output coefficient g; thus, recently, it has become a key
material for realizing pressure sensors with high sensitivity.
For realizing small sensors with high sensitivity, the piezoelectricperformance of PLLA films should be improved. Previously, we investigatedsolid-state extrusion (SSE) to improve the piezoelectric performance of poly
(D-lactic acid) (PDLA), which showed that piezoelectric constant d14 reached18.9 pCN-1. In this paper, we conducted quantitative crystal structural analysis
by X-ray diffraction (XRD) and geometric structural analysis of a helical chiralpolymer to investigate the mechanism of the high piezoelectric performance ofSSE films.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aA-3September 25th (Fri.), <10:00-10:45>
Room 1

Fundamental characteristics of discharge in the short gap
length using the
Cockcroft-Walton circuit
Yuma SANO
Department of Mechanical and Electrical Engineering, Nippon Bunri University

Abstract:
We were using a battery to power in this study. We have to control thevoltage by the switch. And the positive DC voltage is applied to the needle
electrodes in the Cockcroft-Walton circuit through the DC-AC inverter. The
experiment of the basic properties of corona discharge in the closed-type
needle-to-plane electrode system reactor we went.
Atmospheric pressure non-thermal equilibrium plasma is utilized in theremoval of air pollutants. The Cockcroft-Walton circuit is used in the accelerator.
It was applied to the needle electrode by raising the voltage at the
Cockcroft-Walton circuit. It was discharged in a dark room. Bluish white light was
generated at the tip of the needle electrode If you confirm with the naked eye.
DC discharge current pulsations appear to be affected by the DC-AC inverter. It
is measured by the oscilloscope.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aB-1
September 25th (Fri.), <11:00-12:00>
Room 1

Low ozone emission characteristics ofa carbon brush ionizer
Hak-Joon Kim, Bangwoo Han, Chang-Gyu Woo, Yong-Jin Kim
Korea Institute of Machinery and Materials (KIMM)

Abstract:
The concentration of ozone produced as a by-product of ESP usage wasmeasured by changing the voltage to an ionizer with thin carbon fiber brushes,
and it was compared to those from general ionizers which were made of different
materials for high voltage electrode or were made of carbon electrodes withdifferent diameters and numbers. This was done in order to understand thereason why carbon brush ionizer emits low ozone, which has not been
researched until now. The experimental results showed that the low ozone
emission from a carbon brush ionizer was possible not by material but by
sharpness of the high voltage electrode and by multi electrode effect.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aB-2September 25th (Fri.), <11:00-12:00>
Room 1

Hak-Joon Kim, Bangwoo Han, Chang-Gyu Woo, Yong-Jin Kim
Korea Institute of Machinery and Materials (KIMM)

Abstract:
A novel two-stage ESP for IT manufacturing industries was developedthat uses indirect type carbon brush charger which is located outside of a maingas flow duct to achieve perfect separation from contact of polluted gases, andimposes additional electric field between upper and bottom plates of thecharging stage to enhance collisions between ions and particles thus increase
particle charges. The performance of the ESP was evaluated experimentally for
ultrafine particles with a mean diameter of 100 nm based on number by varying
the voltages for chargers and for additional electric field imposing, and numberof the chargers. The total air flow rate for the test were approximate 110 L/min
with 10 : 1 ratio of main and mixing flows in the ESP, and applied voltages forchargers and additional electric field were from -10 to -22 kV, and from -5 to -10
kV, respectively. Collection efficiencies in the ESP were linearly proportional toincrease in number of chargers and applied voltage to chargers, while thosewere inversely proportional to increase in applied voltage for additional electricfield. The collection efficiency of the ESP was reached to over 90% based on
total particle number at the applied voltage to triple chargers of -15 kV andadditional electric field between upper and bottom plates in charging stage of -6
kV/ 100 mm

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aB-3September 25th (Fri.), <11:00-12:00>
Room 1

Study on influence of exhaust gas temperature in theelectrostatic precipitator〇Mitsuhiro Takasaki, Hirofumi Kurita, Kazunori Takashima and Akira Mizuno
Dept. of Environmental and Life Sciences, Toyohashi University of Technology

Abstract:
A diesel engine is one of the most fuel efficient engines and expected tosave energy even it is necessary to remove particulate matter (PM) contained in
the exhaust gas. Diesel particulate filter (DPF) has been established as a key
technology in reducing diesel PM, however, technological improvements topressure drop is still required.
Therefore, we focused on an electrostatic precipitation by taking
advantage of its small pressure drop and efficient collection of nano-sizedparticles. However, one of the problems with an electrostatic precipitator (ESP)
is abnormal dust re-entrainment. To cope with this problem, we studied the effectof gas temperature and surface roughness of collecting electrode onelectrostatic precipitation of diesel PM. As a result, lower gas temperature
showed stable collection and high collection efficiency of particles. In addition,
varying the surface roughness of collecting electrode was effective for improving
the collection efficiency by installing a mesh on it.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aB-4September 25th (Fri.), <11:00-12:00>
Room 1

Water purification using a packed bed reactor with pulsed
electric field○Yudai TAKEDA, Yuki TAINO, Hirofumi KURITA, Hachiro YASUDA, Kazunori
TAKASHIMA and Akira MIZUNO
Dept. of Environmental and Life Sciences, Toyohashi University of Technology

Abstract:
In previous study, we have developed a novel water treatment techniqueto remove and inactivate bacteria such as Escherichia coli (E. coli) utilizing
dielectrophoresis (DEP) induced by pulsed high voltage application. The result
showed that E. coli was successfully trapped by DEP force and at the same time,
inactivated by pulsed electric field (PEF). However, the effect of electricalproperties of sample water on the collection and sterilization characteristics was
not studied. In this study, influence of the conductivity of the samples on thecollection and sterilization of E. coli was investigated. The conductivity of thesamples was adjusted by NaCl and mannitol addition as well as bacteria
concentration. As a result, removal and inactivation rate of E. coli decreased with
conductivity of the sample. But around 50% inactivation rate was observed evenfor highly conductive sample.
Comparison between E. coli and PS beads having nearly the same size
showed that E. coli was collected much more effectively than PS beads probably
because of its agglomerative nature. High inactivation efficiency by PEF can be
resulted from the agglomeration on the pellet surface, through which it is more
likely for the cell membrane to be broken when the pulsed electrostatic field is
induced.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pA-1
September 25th (Fri.), <14:00-15:15>
Room 1

Charging methods to create uniform surface charge
distributions with wide potential range
A. OhsawaJNIOSH

Abstract:
We have investigated corona charging methods using corona needle
arrays or a corona triode for the creation of a uniform surface charge
distributions with wide potential range on insulating films in contact with agrounded plate. Two types of corona needle arrays were used. In the triode
charger, we sought optimum conditions of the separation between the grid andthe film, the way of the electrical treatment of the grid, such as isolated,grounded with a resistor from 30 MΩ to 1000 MΩ, with voltage application andthe corona discharge of 7 wires of 0.1 mm or 0.05 mm driving at constantvoltage or current modes. Consequently, it was found that a triode charging
system with corona wires of 0.05 mm in diameter and a grid electrode at awanted surface potential with a grounded resistor can create the uniform charge
distributions on the films

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pA-2September 25th (Fri.), <14:00-15:15>
Room 1

Numerical Simulation of Behavior of Tumor Cell in Three
Dimensional Dielectrophoretic Device
KENTA Sato
Tokyo Metropolitan University

Abstract:
Effective separation and condensation processes are essential for
precise detection of circulating tumor cells in early diagnosis of cancer. In thisstudy, we proposed a dielectrophoretic device with micro pillar electrodes as cell
separator. Also, we simulated the spatio-temporal behavior of model cells on thebasis of microfluidics and electrokinetics. The particle trajectory in a flow
direction was changed by negative dielectrophoretic force generated between
the pillars. This result suggests the tumor cells can be purified from real blood
under adequate electrical condition.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pA-3September 25th (Fri.), <14:00-15:15>
Room 1

Control of Dc Partial Discharge Development Creeping on
Charged Insulating Film Surface in Air
Yoshiaki YAMANO
faculty of Education, Chiba University

Abstract:
The development of surface discharge on charged insulating film in air(one kind of ESD) was controlled by superimposing the normal component ofelectric field on the charged film surface. The film used was PET of 50 mm thick.
The surface was charged up to ±1 kV in maximum with corona discharges. The
longest air gap between HV electrode tip of metal and the charged film surface
was 1.5 mm. The results suggest that the control of discharge development on
charged surface may be possible if the additional HV electrode is applied toincrease the normal electric field component on the film surface.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pA-4September 25th (Fri.), <14:00-15:15>
Room 1A new method for meauring elctric field in air by a charged
dropletTakashi Sato
Hokkaido University of Science

Abstract:
A quadrapole electrole which is constitute with two pair of wire electrodewas used. Charged droplet is held in the central area of quadrupole electrode byhigh frequency electric field. If additional electric field is applied this systemcharged droplet is affected by it and will move or vibrate by external field. We
tried to measure the electric field strength in air from the movement of droplet by
D.C. electric field and the vibration amplitude by A.C. electric field.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pA-5September 25th (Fri.), <14:00-15:15>
Room 1

Effect of Corona Discharge on EHD Spray
Hyun-Ha KIM
AISTAbstract:
The effect of corona discharge on the electrohydrodynamic (EHD) spray
was studied for both polarities of negative and positive DC voltage. Various
spray modes were visualized using a high-speed camera. The time-resolved
images provided some information on the different elongation pattern according
to the polarity. Typical onset streamers in air under positive polarity had minimal
influence on the spray mode because they were found to be separated in timeand space from the water meniscus. In contrast to the stable glow under positive
polarity, many current pulses (Trichel pulse) were observed in the negative EHD
spray. From the combined analysis of the corona discharges, one may conclude
that the different properties of the coronas were associated with the spraypatterns in both air and pure CO2 environment.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-1
September 25th (Fri.), <10:00-12:00>
Room 2Development of the Static Measuring Equipment under
Vacuum Environments.
〇Tomoko NAKAYAMA, Teppei HOTOHARA, Tomofumi MOGAMI, Yoshiya
MIYABAYASHI and Nobuo NOMURAKASUGA DENKI, INC

Abstract:
Chemical compositions of the ions generated by atmospheric pressure
helium plasma were investigated using an atmospheric pressure ionization mass
spectrometry (API-MS).
The plasma generator used in this experiment was composed by aunion-tee, a quartz glass tube and a stainless steel rod. In the negative ion mass
spectrum with a distance between the glass tube tip and the sampling orificebeing 5 mm, several ion species were observed. The observed ions include O－,
OH－, O2－, O3－, CO3－, HCO3－ andHCO4－. Most of these ions formed hydrated cluster ions and the ions ofO2－(H2O)n were the most abundant in the spectrum. The spectrum changed
significantly by changing the distance between the glass tube tip and thesampling orifice to 10 mm. The peak of CO3－ became the most intense peak
and the ions of O2－and HCO4－ decline, which was probably due to theion-molecule reactions with surrounding molecules.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-2September 25th (Fri.), <10:00-12:00>
Room 2

Charge neutralisation from the side surface of an insulatingplate -- Use of grounded planes to control ion flows
A. OhsawaJNIOSH

Abstract:
This paper presents the effect of the placement of grounded planes tocontrol ion flows on charge neutralisation from the side surface of an insulatingplate. We investigated the phenomena of this charge neutralisation using 2-D
electrohydrodynamic simulations with an insulating plate with 1 cm or 1 mm thick
and with different initial charge distributions at 1 µC/m^2. Consequently, we
found that the grounded planes can modify the charge neutralisation; however, it
is not easy to neutralise the surface charges uniformly, so that charge
neutralisation from the side surface of an insulating plate is improper for practicalapplications; as concluded previously, we can suggest again that simultaneous
charge neutralisation from both larger surfaces would be proper.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-3September 25th (Fri.), <10:00-12:00>
Room 2

Minimisation of offset voltage for pulse-DC corona ionisers
A. OhsawaJNIOSH

Abstract:
We present an experimental demonstration of a prospective idea
obtained from 2-D electrohydrodynamic simulations of positive and negativeions where continuously emission of quasi-neutralised positive and negativeions from corona ionisers can yield zero offset voltage. We developed acontinuous balanced pulse-DC ioniser using FET push-pull circuits anddemonstrated this theory.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-4September 25th (Fri.), <10:00-12:00>
Room 2

Discharge Current from two-terminal devices measured by
the discharge-current probe
Yutaka Soda
Probetek

Abstract:
Contact discharge from two-terminal devices was investigated using thedischarge-current probe, which was newly developed current-probe formeasuring the contact discharge. A contact-pin and a discharge-resistance canbe connected by SMA-connector. A single stripe applied 20V on a bakelite-stage
discharged with 60mA peak-current, whereas that on a metal-stage increased to
100mA. The capacitance estimated by integrating the current-waveform
increased with the material of the stage rather than the size of the pattern. Twoterminal devices of a resistance, an inductance and a capacitance were
measured the discharge-current. The peak-values were almost equivalent,however the decay-waveforms were different as the current delayed across theelement.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-5September 25th (Fri.), <10:00-12:00>
Room 2

Investigation of a Fire that Occurred while Transferring
Gasoline from a Drum to a Tank of a Fixed Oiling Equipment
Hiroyuki TAMURA
National Research Institute of Fire and Disaster

Abstract:
At a fixed oiling equipment in a plant, ignition happened whiletransferring gasoline from a drum to a tank of a fixed oiling equipment, andworker's protective wear was damaged by a fire. The possibility of the ignition bystatic discharge was examined as a fire cause. Because antistatic measures
were not taken, it seemed that the worker was electrified. The induction charging
happened in an aspirator pipe when the electrified worker gripped the aspirator
pipe. It has been understood that the electrical discharge by the electrification
has energy that exceeds the minimum ignition energy of gasoline.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-6
September 25th (Fri.), <10:00-12:00>
Room 2

Electric Field Strength at the Surface of a GroundedElectrode by a Charged Particle Cloud Simulated by Linecharges and Condition for Discharge Inception〇Yoshio HIGASHIYAMA, Masaaki ENDO and Toshiyuki SUGIMOTO
Graduate School of Science and Engineering, Yamagata University

Abstract:
To cause a large scale electrical discharge from a space charge cloud, acharged particle cloud was formed by ejecting from a corona charger consistingof a wire to cylinder electrode. The potential distribution around the cloud andthe electric field strength for streamer discharge inception from a grounded
sphere electrode was investigated by field calculation using a charge simulation
method. Based on the experimental data, a model of charged particle cloud wasconstructed. The space charge of the cloud was simulated by line charge with acharge density of around 8uC/m estimated from a discharge current. The
potential in the center of the cloud reached at 350kV/m for a 4 m long and 1 m
diameter cloud. Although the electric field strength at the surface of a sphericalelectrode with a smaller diameter becomes higher for the same charged cloud,under the condition when a brush discharge was observed, the electric fieldstrength was almost the same value regardless of diameter and location of asphere electrode. Furthermore, the ionization disatnce obtained by calculation
was consistent with a length of a streamer discharge extending from a groundedelectrode.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aD-7
September 25th (Fri.), <10:00-12:00>
Room 2

Dust-proof performance of bi-polar electrostatic ionizer
Naoto Nogera1,Teruo Suzuki1,Kwangseok Choi2,Mizuki Yamaguma2
Kasuga Denki Inc.1,National Institute of Occupational Safety and Health,Japan2

Abstract:
In this paper, we investigated the dust-proof performance of the bi-polarelectrostatic ionizer experimentally. Circulating type dust testing apparatus andtalcum powders 6 µm were used in this study. Compressed air supplied to thebi-polar electrostatic ionizer was in the range of 0.01 - 0.05 MPa. Each test timewas 1800 s. As the result, in the inner parts of the ionizer, talcum powders did
not enter under all test conditions. It was also confirmed that the ion generating
ability was the same before and after the dust-proof testing.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pB-1
September 25th (Fri.), <14:00-15:00>
Room 2

Study of Plasma-assisted Combustion for Low Emission〇Tomohiko IKEDA*
Study of Plasma-assisted Combustion for Low Emission

Abstract:
This paper proposes using a dielectric barrier discharge (DBD) insteadof catalyst of catalytic combustion. The catalytic combustion is used for a stablecombustion of a lean mixture, but it has some disadvantages. The DBD is
expected to reduce the disadvantages of the catalyst. A lean premixed
methane-air mixture flows in a DBD, then the emission gas is measured. It isshown that the DBD can cause combustion below the lean flammable limit.
When the discharge energy increases, the combustion rate of methane
increases, while NOx emission increases. It means that radicals in plasma
promote chemical reaction different from the usual combustion reaction.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pB-2September 25th (Fri.), <14:00-15:00>
Room 2

Production of Au Nanoparticle Films Using Electron-Beam
Induced Non-Thermal Plasma on the Surface of Aqueous
Solutions〇Teruyuki HAKODA*, Ayaka TAKAHASHI**, Akihiko SHIMADA*,Shunya
YAMAMOTO*, Hirofumi ARITANI**, and Tetsuya YAMAKI**Japan Atomic Energy Agency, ** Saitama Institute of Technology

Abstract:
Aqueous solutions containing 1 mmol/L AuCl4- ions and 0.5-20v%
alcohol (2-propanol or ethanol) were irradiated with a few tens keV electron
beams (EBs).Gold (Au) films were produced on the surface of the irradiatedsolution. The
production rate of the Au films was high at concentrations of 0.5-1v% for
2-propanol and became lower at higher concentrations. At an alcohol
concentration of 0.5v%, the Au particles of the films were 5-20 nm and5-100 nm in diameter for 2-propanol and ethanol, respectively. The XPS
analysis demonstrated that the films consisted of about 85wt% of metal Au(0),10wt% of Au(I), and a few w% of Au(III) for 2-propanol. A Fourier transform
infrared diffusion reflectance (FTIR-DR) measurement showed that CO wasoxidized into CO2 over the Au films loaded to TiO2 substrates at a temperatureof 200°C, enabling us to confirm a catalytic activity.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pB-3September 25th (Fri.), <14:00-15:00>
Room 2

Generation of ZnO particle using pulse arc discharge
plasmaKunisuke Fujii
Kumamoto University

Abstract:
ZnO particle has a high UV shielding property and transparency. So ZnO
particle is widely applicable, for example cosmetics, medicines and plastics. But,
usual creating method is difficult control and complicated equipment. In thisstudy, ZnO particle was created using pulse arc discharge plasma. This method
is easier control and complicated than usual. And, we investigated influences ofcomponent of the product, diameter of the product and shape of the product bycharging energy and gas pressure.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pB-4September 25th (Fri.), <14:00-15:00>
Room 2

Atmospheric Plasma Hybrid Surface Treatment for
Fluoropolymer Plastics (Toward Applications for Medical
Devices, Biocompatible Materials, and Electronic Devices)
Masaaki Okubo, Tomoyuki Kuroki
Osaka Prefecture University

Abstract:
A surface modification technique that improves the adhesion offluorocarbon polymer films such as polytetrafluoroethylene (PTFE) is developed
using argon at atmospheric pressure and acrylic acid vapor nonthermal plasma.
From results of peeling tests, XPS analyses, and SEM photograph, it isconfirmed that chemical bonds with F atoms decrease greatly on the surface andthat a hydrophilic layer is formed due to the process. Using the present surface
treatment apparatus, it is possible to bond A4-sized sheets of PTFE and metals
or rubbers without losing the excellent physical properties of PTFE.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-1
September 25th (Fri.), <10:00-12:00>
Room 3

Effect of ozone applying method on removing floating weeds〇Yoshihiro KAWADA*, Keiko OSHIDA** and Hirotaka SHIMIZU**The Polytechnic University of Japan **Nihon University

Abstract:
Colonies of floating weeds are grown over at the stagnant water area ofa lake and a river. These often cause environmental issue. Therefore, it isneeded for maintain water environment to prevent growth for the floating weeds.
The aim of this study is to control growth and death of floating weeds with ozone.
The applying method of ozone to floating weeds is investigated. As results, whenozone is applied to the gas around floating weeds, floating weeds are deadeffectively. To apply the water with ozone to the floating weeds is less effective
than to apply to air around floating weeds. In case that the ozone generator isdriven by solar array, the floating weeds having the leaves of approximately 5
times area as large as that of solar array could be dead.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-2September 25th (Fri.), <10:00-12:00>
Room 3

Effect of Swirling Liquid Flow on Plasma-based Water
Treatment○Shohei MATSUNARI, Shinichi AKAGAWA, Shuichi AKAMINE, Ryuta ICHIKI,
Seiji KANAZAWA
Department of Electrical and Electronic Engineering, Oita University

Abstract:
Three-dimensional (3D) printing technology is now essential in making
things, and we have introduced this technology into the design and fabrication of
non-thermal plasma reactors. In this study, water injection part of the plasma
reactor was prepared by a 3D printer. To produce swirling liquid flow in therunning water along an inner wall of a cylindrical tube, a specific design wasadded into the injector. Three types of the injectors were prepared by the 3D
printer and those performances were evaluated by the comparison of thedecolorization rate of indigo carmine solution. As a result, the swirling liquid jettype injection was most effective method under our experiments for water
treatment.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-3September 25th (Fri.), <10:00-12:00>
Room 3

Influence of Pulse Width on Decomposition of
Dichloromethane by Discharge Inside Bubbles in Water○Masashi IWABUCHI*，Keita WADA*，Katsuyuki
TAKAHASHI*，Koichi TAKAKI*，Naoya SATTA***Faculty of Engineering, Iwate University,**Faculty of Agriculture, Iwate
University

Abstract:
Influence of pulse width on decomposition of dichloromethane bydischarge inside bubbles in water has been investigated. The discharge reactor
consists of a glass tube and a tungsten wire inserted into the glass tube, which isimmersed in the water. Argon gas is injected into the glass tube to generate
bubbles in the water.
Two types of pulsed generator, a magnetic pulse compression circuit
and an inductive-energy storage system using semiconductor opening switch,
are used to generate high voltage pulse with various pulse widths.
Dichloromethane (DCM) which is a volatile organic compound is
employed as a specimen to evaluate decomposition efficiency. The DCM isdecomposed successfully by discharge inside bubbles in water. TOC removal
efficiency and DCM decomposition efficiency are similar in each pulse width.
Energy efficiency for decomposition increases by decreasing the pulse width.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-4September 25th (Fri.), <10:00-12:00>
Room 3Development and evaluation of pencil type solution plasma
reactor〇1K. Koyama, 123O. L. Li., 1234 N. Saito
1Graduate School of Engineering, Nagoya Univ. , 2Green Mobility Collaborative
Research Center, Nagoya Univ., 3Institute of Innovation for Future Society, 4
JST-CREST

Abstract:
Solution plasma (SP) is defined as; one type non-equilibrium, cold
plasma in liquid. SP is different from other systems by avoiding inert gas usage,
and generating inside solution environment. SP has been used for metal
nanoparticles
synthesis,
surfacemodifications,organic-compound
decompositions, and carbon materials synthesis. There are application
limitations because of small plasma area inside solution. It is necessary toincrease the plasma area in order to obtain higher efficiency from the process. In
this study, we have developed a new reactor for continuous processing andcontinuous synthesis of the material. Non-equilibrium plasma was generated
with two type of reactors (attached needle electrode and coil electrode or meshelectrode). Despite of two reactor usage, solution temperature didn’t increase
even after 30 min of discharge. It is observed that by decreasing electrodes
distance, plasma is shifting from the end of needle electrode and generating
between mesh and needle electrodes with a higher energy. We have succeeded
in developing a new reactor, which can generate plasma continuously.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-5September 25th (Fri.), <10:00-12:00>
Room 3

Effect of irradiation distance of plasma jet on ROS supply toliquid bottom.
○Shota KUSUMEGI, Akihiro KUDO, Takuya TSURUMARU, Tomohiro
SAKANOSHITA, Akihiro SATO, Yasutaka WAKABAYASHI, Toshiyuki
KAWASAKI
Nippon Bunri Univ.

Abstract:
The supply of reactive oxygen species (ROS) to a target through liquid
byplasma jet should be clarified. However, the etailed mechanisms are not clear
now. Therefore, the ROS generation in liquid by the plasma jet has been studied
by various measurement methods. In this study, the use of a gel reagent withiodine-starch reactions has been focused as a plasma-generated ROS detection
method. The gel reagent can work even in water. In this paper, a plasma jet wasirradiated onto the water surface, and the ROS reaching the water bottom weredetected using the gel reagent set in the water. The plasma jet generator was
made of a glass tube with wrapped powered and grounded electrodes. Heliumgas with 1% oxygen was supplied into the glass tube at a flow rate of 3 L/min.
The water layer with a thickness of 1 mm was placed onto the gel reagent. The
irradiation distance was varied from 5 to 30 mm. As a result, the ROS supply to
the water bottom by plasma jet was significantly influenced by the irradiation
distance. The results obtained in this study also indicated that the ROS supply
mechanisms were markedly different from the ozone exposure.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-6
September 25th (Fri.), <10:00-12:00>
Room 3

Decomposition characteristic of olive oil and various fatty
acids in oil-water mixture by pulsed discharge plasma andozone treatments○Takanori TANINO, Daiki KAWAI and Takayuki OHSHIMA
Graduated School of Science and Technology, Gunma University

Abstract:
Decomposition characteristic of olive oil in oil-water mixture by pulsed
discharge plasma and ozone treatment was investigated. The decomposition
profile of olive oil showed liner decrease for the initial
10 min treatment and became slower after that in the pulsed discharge
plasma treatment. In ozone treatment, rapid decrease was observed for initial 5
min treatment. Solid substance was produced by both pulsed electric discharge
and ozone treatment. Decomposition characteristics of several chain length fatty
acids by both treatments were also investigated. As short and middle chain fatty
acids, butyric and caprylic acids were used, respectively. These short and middle
chain fatty acids were successfully decomposed by the pulsed discharge plasma
treatment. On the other hand, ozone treatment could not decompose these fatty
acids.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25aC-7
September 25th (Fri.), <10:00-12:00>
Room 3

Effect of Organic Acids on Cesium Removal fromContaminated Soil by the Electrokinetic Remediation〇Tomoaki MIURA*，Mahmudul KABIR*， Masafumi SUZUKI*，Shyunsuke
NAKAJIMA**，Shigehisa MORI***Graduate School of Engineering and Resource Science, Akita University，**Sanwa Tekki Corporation

Abstract:
Radioactive materials were scattered on the vast area near Fukushima,
Japan after the Fukushima Atomic Power Plant accident after the earthquake
occurred on the 11th March, 2011. Among the radioactive materials, especiallyCesium (Cs) caused a severe contamination of soil and due to its longer half-life(30.0 years), the removal of Cesium is urgently needed. However, the removal of
Cesium from soil especially in the mountainous area is not so easy. We haveproposed a method of Cesium removal which can also be applied in the slopearea. Non-radioactive Cesium was used in our experiments. During theElectrokinetic process of the contaminated soil, acetic acid and citric acid wereapplied in purpose of more Cesium removal. These acids are easily
decomposable in nature. Without any electric field, a small range of Cesium
removal was possible with tap water, and the two organic acids. Performing theexperiment with Electrokinetic process, using acetic acid as electrolyte, showeda better result considering the amount of removal of Cesium. Thus, ourElectrokinetic process has showed good results to remove Cesium fromcontaminated soil.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pC-1
September 25th (Fri.), <14:00-15:15>
Room 3Development of volume resistivity sensor using corona
charging〇Yuki YOSHIDA*, Toshiyuki SUGIMOTO*,Nobuo
Yamagata University*,KASUGA DENKI. INC. **Abstract:
Although there is a pencil scratch hardness test to check cure degree of
painted film, the painted surface will be destructed by the measurement. A
noncontact type cure degree sensor has been developed using noncontact
surface resistivity measurement method. The cure degree sensor can principally
only apply for the paint on the insulating material. In this paper, the system was
improved by changing corona charger so that the electrostatic potential at the
charging spot can be measured. It was found that the surface potential of thepainted layer on the grounded material was increased with the curing time.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pC-2September 25th (Fri.), <14:00-15:15>
Room 3Fundamental characterisitics of sheet stapler using areelectrostatic force
Keisuke OZAWA
Yamagata University，KASUGA DENKI. INC.

Abstract:
Although there are many sheet products stuck by glue or adhesivematerial， it is very difficult to control mechanically adherence and removal. In
this study， we proposed an electrostatic sheet stapler that can adhere andremove the sheet material by an electrostatic force. The sheet material ischarged by the positive and negative corona charging using two needle and gridelectrodes. It was found that the electrostatic sheet stapler can control
adherence and removal force by the corona charging and charge eliminationand that the withstanding weight is over than 30g.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pC-3September 25th (Fri.), <14:00-15:15>
Room 3

Internal Observation of a Levitated Microdroplet Using
Electrodynamic Balance○Yudai SHIRATORI, Kenichi SHODA, Azuchi HARANO
Graduate School of Science and Technology, Gunma University

Abstract:
The electrodynamic balance (EDB), where single charged particle ordroplet can be levitated in space over periods of hours, provides the opportunity
for in situ observation of aerosol morphologies. Nevertheless, the previously
developed EDB has not been able to image with high-resolution from the sideview. Hence, we developed a novel EDB optimized for the visual access of an
optical microscope. Using this EDB, the deliquescence and solidification
behaviors of the inorganic salt droplet (NaBr) was clearly observed.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pC-4September 25th (Fri.), <14:00-15:15>
Room 3

MEA Fabrication using Cone-jet Mode of Electrostatic Spray○Masayuki EGASHIRA, Satoshi MIKAMI, Kodai YAMAOKA, Shota YAZAWA,
Yusuke KUDO, Tetsuo MAKITA
Nihon University, Collage of Industrial Technology,Department of Electrical andElectronic Engineering

Abstract:
A direct methanol fuel cell (DMFC) is paid attention which is new
generation portable power source. It is high cost. Because, DMFC requires aplatinum to generate the power. Performance of DMFC is progress by increasing
surface area of membrane electrode assembly (MEA). We have been studying
about fabrication method of MEA by electrostatic spray. In this study, MEA ofDMFC was fabricated by cone-jet mode of electrostatic spray.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

25pC-5September 25th (Fri.), <14:00-15:15>
Room 3

Evaluation of charge elimination property of EFD ionizer○Yuta GOTO, and Toshiyuki SUGIMOTO
Graduated School of Science and Engineering, Yamagata University

Abstract:
Ionizers are typically used for eliminating the static charge on targets.
We have proposed an Electric Field Driven(EFD) ionizer which can supply ionsby an electric field in order to eliminate target charge faster than typical air
ionizer. In this paper, the charge elimination characteristic of EFD ionizer wasinvestigated. The charge elimination speed was significantly increased withincreasing needle voltage and decreasing the distance h between the ionizer
and the target. Converted charge eliminate rate Y is linearly increased with time
for smaller h.