bluuebunny/crossref_metadata_2025 huggingface dataset:
Nano Gold Doped Nano TiO2 – An Efficient Solar Photocatalyst for the Degradation of Persistent Organic Pollutants
Authors: Thomas Jesty , Chitra K.R.
Published: June 2014

Novel nanogold doped TiO2nanoparticles are found to be highly efficient for the photocatalytic degradation of organic pollutants. TiO2nanoparticles were synthesized from titanium (IV) isopropoxide through hydrothermal route. Gold nanoparticles were prepared by chemical reduction and stabilization employing D-glucosamine, and were doped in TiO2nanoparticles. The analysis revealed that the diameter of gold nanoparticles used for doping is around 5 nm. Undoped and gold doped samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Vis diffuse reflectance spectra (DRS) and field emission scanning electron microscopy (SEM). DRS study showed that nanogold doping in titania nanoparticles induces a shift of absorption edge to the visible range and reduces the band gap. Complementing our earlier finding that noble metal doping in titania nanoparticles enable photocatalytic activity in the visible region, it is showed that gold doping enhances photocatalytic activity of the titania nanoparticles. This was confirmed by the degradation of the dye methylene blue repeatedly using gold doped nanoparticles under direct sunlight. Further, the nanoparticles were used to study the degradation of the persistent organic pollutant, β endosulfan, and near complete degradation were observed in an hour. Regenerated nanoparticles were found effective for the degradation of the pesticide for more than three cycles.
System Identification in Modified Diabetic Model for Nanochip Controller
Authors: binti Mohd Yusof Nur Farhana , Md Som Ayub , Ibrehem Ahmmed Saadi , Abdulbari Ali Sherif
Published: June 2014

Keeping pace with emerging technologies, artificial pancreas is highly recommended to be used as an alternate way to solve blood glucose level problem for Type 1 diabetes patients. It is aimed to develop an embedded nanochip controller in order to regulate the blood glucose level within the safety range. However, due to the lack of effectiveness in algorithm, the blood glucose level in patients body is still not achieving the optimum level. The function of the algorithm, which is the heart of the device, needs to be analyzed in order to ensure the device can be fully utilized. Therefore, system identification technique is applied with objective to study the interrelation among all parameters and variables in the modified diabetic model. As a consequence, the results derived from the method, give us better comprehension in determining which parameters give higher effects on the glucose and insulin system. Thereupon, the main factors in the system are able to be recognized through system identification technique. In this study, parameter tmax_I gave highest effect percentage with 66.89% at interaction with insulin,I. On the whole, system identification is very useful to see clear picture of interrelation and correlation in glucose and insulin system.
Kinetics of Silver Nanoparticle Growth Using DMF as Reductant – Effect of Surfactants
Authors: Sarkar Paramita , Parameswaran Chithra , Harish C. , Chandra M. Bhanu , Grace A. Nirmala
Published: June 2014

Silver nanoparticles are synthesized using N,N dimethyl formamide (DMF) both as reductant as well as solvent. The reaction is performed in the presence and absence of surfactants at room temperature to know the effect of the same on the size and shape of the silver nanoparticles. In this regard, two different surfactants viz. polyvinylpyrolidone (PVP) and cetyl trimethyl ammonium bromide (CTAB) are used. The rate of the reaction and the formation kinetics is continuously monitored by UV-vis spectroscopy at regular time intervals. The corresponding change in plasmonic peaks and full width half maxima (FWHM) is studied in detail. The particle size is determined using Mie plot.
Quantum Noise Suppression in Two Dimensional Photonic Crystal Fibers
Authors: Latha G. Madhavi , Sripriya M. , Ramesh N.
Published: June 2014

In this paper we present the basic theory of nonlinear photonic crystal fibers (PCFs) with a focus on theoretical aspects of generating squeezed light using Kerr effect. The FDTD method is employed to study the guided modes of em field propagation in PCF. The degree of squeezing is determined using correlations function corresponding to the fields of light. It is shown that noise in a squeezed light is reduced to about 24% below the minimum noise observed in coherent light.
Influence of Size on Effective Band Gap of Silicon Nano-Wire
Authors: Diwan Bhoopendra Dhar , Dubey Vinod Kumar
Published: June 2014

In this article, the effect of wire-size on the effective band gap of Silicon (Si) is analyzed. The band gap is one of the most significant electronic parameters of semiconductor material. The band gap of semiconductor depends on temperature, pressure, composition, number of atoms as well as on the size of the particle. When semiconductors are synthesized at nanoscale level, their small particle size gives rise to quantum confinement and the energy bands are split into discrete levels. It is observed that effective band gap of semi-conductor depends on the size of the wire (number of atoms and dimensions) and it increases by decreasing the size of Si nanowire. The size quantization effect is noticed as a shift of the effective band gap toward lower values with increasing temperature of Si nanowire which also shows increase in atomic vibrations. Keywords: Size effect; Energy band gap; Semiconductor, effective mass; nanowire.
In Situ Synthesis of Copper Phthalocyanine Modified Multiwalled Carbon Tube and its Electrocatalytic Application towards the Oxidation of Nitrite
Authors: Porchelvi K.N. , Meenakshi S. , Pandian Kanniyan
Published: June 2014

We have synthesized metal phthalocyanine modified multiwalled carbon nanotube by a solid-phase synthesis method by heating a reaction mixture of phthalic anhydride, ammonium molybdate and MWCNT in a required molar ratio using muffle furnace. The metal phthalocyanine modified MWCNT samples collected and then washed extensively with various solvents to removal all impurities and unreacted starting materials. The resulting nanocomposite was characterized by IR, UV-Visible spectroscopy, Scanning Electron Microscopy, X-ray diffraction and Raman spectroscopy. The nanostructure of the CuPc/MWCNT assembly exhibits a homogeneous nanocomposite. The electrocatalytic study of the CuPc/MWCNT assembly towards the oxidation of nitrite was investigated. An enhanced oxidation peak current was noted with lowering oxidation over potential ranges. The proposed method can be applied for the amperometry detection of nitrite present in food samples.
Crystal Structural Studies of ZnO Nanorods and their Band Gaps
Authors: Kasim Muhd Firdaus , Kamarulzaman Norlida , Kamil Suraya Ahmad
Published: June 2014

Zinc oxide nanostructures have been done by many scientists but amongst the soft chemistry methods, chelating agents are normally used. In this work zinc oxide nanostructures have been synthesized using a soft chemistry method without using a chelating agent. The precursor were annealed at various temperatures of 400 °C, 500 °C, 600 °C, 700 °C, 800 °C and 1200 °C for 24 h. Nanostructures are found with rod-like shapes and they are compared with larger oval morphology. X-Ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), and UV-Vis spectroscopy were used for characterization. XRD results confirm that all peaks were pure and single phase without the presence of any impurities. It was found from electron microscopy results that the morphology of the materials annealed at 400 °C possesses nanorod shape and as the calcination temperature increases, the material consists of mixed rod, spherical and oval shapes. The aspect ratio of the materials decreases when the annealing temperature increases. The absorption edges of the materials annealed at higher temperatures show a red-shift implying that narrowing of the band gaps occur in the materials. Band gap were evaluated and found to be between 3.32 to 3.19 eV.
Study of Electronic and Magnetic Properties of Nitrogen Doped Graphene Oxide
Authors: Jayabal Ezhilan , Rajendiran Rajesh , Rengarajan Venkatesan
Published: June 2014

The Nitrogen doped graphene oxide (NGO) was synthesized by doping N-atoms on graphene oxide (GO) sheet by using melamine which serves as the nitrogen source, through hydrothermal approach. The insertion of nitrogen atoms into the graphene oxide sheet was confirmed by FT-IR, EDS and Raman spectroscopic techniques. We also probed into the tuned dielectric and magnetic properties of NGO due to the decomposition of oxy functional groups of GO and the insertion of pyridinic, pyrrolic and graphitic type nitrogen atoms into the graphitic structure. The dielectric properties were measured by Broadband Dielectric Spectroscopy (BDS). The magnetic behaviour of the sample was demonstrated by Vibrational Scanning Magnetometer (VSM).
Extraction Technology and Determination of Total Flavonoid in Magnolia Liliiflora Petals
Authors: Jiang Yi Hua , Jiang Xin Long , Cai Cheng Gang
Published: June 2014

Orthogonal experiment optimization of microwave-assisted extraction (MAE) conditions of total flavonoids from Magnolia liliflora petals with the factors of ethanol concentration, extraction time,microwave power,solid/liquid ratio on the yield of total flavonoids were studied. The results showed that optimum extracting conditions of total flavonoids from Magnolia liliflora were as follows: adding 1:10 g·mL-1 of 40% alcohol and extracting for 5 min,microwave irradiation power 464W, under the optimal conditions, the maximal yield of flavonoids was of 2.08%.
Chemical Constituents Study of Weixian Turnip (Raphanus sativus L.)
Authors: Li Gui Feng , Deng Li Gang , Zhang Hong , Zhao Ping Juan , Wang Hui , Li Qian , Ma Bin
Published: June 2014

Objective: Cruciferous herb plant Weixian Radish (Raphanus Sativus L.), also known as Lai Fu, is a kind of popularly eatable fruit and vegetable. The present paper describes the isolation and characterization of two compounds isolated from Weixian Radish. Methods: The methanol extraction was separated by column chromatography. Obtained compounds were identified with physical and chemical properties and NMR. Results: Two compounds were isolated from the extract of Raphanus Sativus L. for the first time and their structures were identified as β-sitosterol and 1-O-(β-D-glucopyranosyl)-(2S, 3S, 4R, 8E)-2-[(2'R)-2'-hydroxyltetracos-15'-enoylamino]-8-octa-decene-1, 3, 4-triol, which have many biologically active effects.
Comparison of Volatile Compounds in Raw and Cooked Chinese Mitten Crab Hepatopancreas and Gonads
Authors: Gao Xian Chu , Gu Sai Qi , Wang Xi Chang , Tao Ning Ping , Zhuang Jing , Liu Ming Ying , Xie Yu Cen , Wu Rui
Published: June 2014

The volatile compounds in different edible parts (gonads, hepatopancreas) of raw and cooked Chinese mitten crab were extracted by a new type material (MonoTrap) and analyzed by gas chromatography-mass spectrometry (GC-MS). Totally 97 volatile compounds were identified by GC-MS and their odor characteristics were analyzed by ROAV values screen. There is a significant difference of odor-active compounds between male and female Chinese mitten crab. What’s more, the results indicated that the varieties and contents of volatile compounds in hepatopancreas were greater than in gonad. The results of ROAV values screen were summarized, 15 odor-active compounds whose ROAV values greater than 0.1and 9 key odor-active compounds whose ROAV values greater than 1 were further selected. The results indicated that decanal, trimethylamine, nonanal were the key odor-active compounds in hepatopancreas and gonads.
Microstructure Analysis of Xanthoceras Sorbifolia Shell Activated Carbon
Authors: Zhu Hong Zhi , Xue Zhen Hua
Published: June 2014

The Xanthoceras sorbifolia shell activated carbon which was prepared by using zinc chloride as activating agent has a strong adsorption performance of cationic adsorbate (methylene blue) 845.275mg/g and anionic adsorbate (iodine) 1584.96mg/g. Specific surface area study showed that: the adsorption isotherms of activated carbonsamples are type I isotherm adsorption, BET specific surface area was 1455.233m2/g. Displayed by pore specific surface analyzer's measurement results that the pore radius ratio of activated carbon in the range of 3.2-3.4Å is the largest. This proves that these holes are mainly micropores. Meanwhile, the conclusions obtained by the SEM further proof.
Dicamba Degradation Using O3/UV Process in Aqueous Solution
Authors: Chen Lan
Published: June 2014

In order to control pesticide pollution, the degradation of dicamba in aqueous solution was investigated in a bubble reactor in laboratory using separate UV, separate O3, O3/UV systems. The experimental results show that UV has a synergistic effect on ozonation. The synergy factor of O3/UV system is calculated to be 1.96. The degradation of dicamba follows pseudo-first-order kinetics. Considering that the composition of actual water is complex, chloride, nitrate, carbonate and bicarbonate ions, common ions appeared in actual water, were selected to add to reaction solution in O3/UV system. Chloride and nitrite ions have inhibiting effect. Carbonate and bicarbonate ions have promoting effect. In O3/UV system, different impurity ions have different influence on dicamba degradation with small amount addition.
Physicochemical and Rheological Properties of Gelatin Extracted from Tilapia (Oreochromis niloticus) Skin and Concentration Effect
Authors: Bai Yun , Peng Shuai , Huang Yi Qun , Lai Ke Qiang
Published: June 2014

Tilapia skin gelatins were extracted with optimal acetic or citric acid concentrations which provide similar optimum protein yield (22g/100 wet weight), and rheological properties of gelatin solutions with various concentrations were measured and characterized. Commercial valued properties including bloom strength, gelling and melting point, viscosity were measured to compare the samples of the two gelatins. Liner viscoelastic range (LVR) of gelatin preparations with increasing concentration and decreasing temperature were determined. Temperature sweep was conducted for comparison and characterization the relationships between concentration and gelling/melting point of gelatin extracted by citric acid or acetic acid. The results showed that the melting and gelling point varying with concentration followed exponential curve (R2 as high as 0.99), and there were rarely molecular fractions in extracted gelatins. Elastic modulus (G′) of gelatin gels was mainly a function of cold temperature and time, while the discrepancy between the melting behaviors of gelatin extracted by two acids may stem from the composition and molecular weight of gelatin chains. In conclusion, the tilapia skin gelatin extracted in our study is of high qualities and rheological analysis is a critical tool for material of gelatin differentiation from varied molecular properties.
Shortening Fermentation Period of Fermented Sausage by Adding Exogenous Enzymes
Authors: Liu En Qi , Wu Yong Hua , Zhang Jian Ping , Li Yong , Song Hui
Published: June 2014

The aim of this work was to find out the effects of exogenous enzymes on the fermentation period of fermented sausages. The results showed that the FFAs and NPN contents of the sausages added exogenous enzymes were 2.83 and 3.34 times than that of the samples without exogenous enzymes (CK) at fermenting 12 h, respectively. Thus, compared with the CK, the fermentation period could be reduced about 60% by adding 0.10% lipase, 0.01%% acidic protease and 0.015% flavor protease, and the quality of products were as good as CK.
Towards Enhanced Bioactivity: Calcium Ion-Doped Polypyrrole
Authors: He Yuan , Dai Ling Feng , Wang Shi Hui , Sun Ya Nan , Shi Wei , Ge Dong Tao
Published: June 2014

Based on the unique redox property of electrically conductive polymers, Ca2+ was incorporated into polypyrrole (PPy) film that previously doped with polyelectrolyte heparin. Then the apatite-forming ability of the Ca2+-doped PPy was examined by a biomimetic method using stimulated body fluid (SBF), which has ion concentration nearly equal to those of human blood plasma. It was found that the Ca2+-doped PPy successfully formed bonelike apatite deposition on its surface after soaking in SBF for only 3 days, whereas the similar apatite deposition was formed on Ca2+-free PPy after soaking in SBF for 7 days. These indicated that the entrapment of Ca2+ into PPy could accelerate the formation of apatite deposition and the Ca2+-doped PPy was possessed of enhanced bioactivity. It is expected that the Ca2+-doped PPy would be a useful bioactive coating material of metallic medical devices or tissue engineering scaffolds to promote the bone tissue regeneration.
Effects of Different Purification Methods on Chicken Feather Keratin
Authors: Pourjavaheri Firoozeh , Mohaddes Farzad , Shanks Robert A. , Czajka Michael , Gupta Arun
Published: June 2014

Every year billion kilograms of unused feathers result from the poultry industry worldwide, which in effect impose a difficult disposal process to the environment. Chicken feathers are considered as a valuable and renewable keratin protein source, which could be used advantageously in a number of applications as alternatives to feather meal and feather disposal. Although the potential applications of keratin derived from chicken feathers have been investigated, the initial purification phase has not been fully described in the literature. Original chicken feathers contain many biological organisms along with other contaminants after plucking. Unprocessed chicken feathers are considered as potentially hazardous biological materials due to the presence of blood borne pathogens; therefore, the decontamination process is very important. The purpose of this work is to compare the effects of different purification techniques on chicken feathers prior to keratin isolation. These processes include surfactant washing, soxhlet extraction with ethanol, ozone, and sodium chlorite solutions. Thermogravimetric analysis, vibrational spectroscopy, and wide angle X-ray scattering were used to characterise the purified feathers prior to keratin extraction.
A Novel Cement Fluid Loss Additive P1402
Authors: Xiao Qiang , Xiao Wen Fa , Liu Xin Xin
Published: June 2014

A novel cement fluid loss additive P1402, which synthesized using the monomers of 2-acrylamido-2-methyl-propane sulphonic acid (AMPS), acrylic acid (AA), N,N dimethyl acrylamide (DMAM) and N-Vinyl-2-pyrrolidone (NVP) by the method of aqueous solution polymerization. The ratio of monomers AMPS:AA:DMAM:NVP at 2:1.5:1:1, reaction PH at 10.8, reaction temperature at 65°Cand reaction time about 5 hours. The IR spectrum of P1402 show that the polymer with the structure of all the monomers .The fluid loss performance testing show that the forpolymers P1402 has an excellent thermal stability. The fluid loss additive P1402 has an excellent tolerance to salt and high temperature.
Activation Energy of Autonomous Polymer Chains with High LCST
Authors: Hara Yusuke
Published: June 2014

A self-oscillating polymer chain consisting ofN-ethylacrylamide (NEAAm) and a Ru catalyst of the BelousovZhabotinsky (BZ) reaction was prepared. The polymer chain underwent soluble-insoluble self-oscillation induced by the BZ reaction, originating from the differing solubility of the Ru moiety in the reduced and oxidized states. The amplitude of self-oscillation was small compared to that for the polymer chains prepared fromN-Isopropylacrylamide (NIPAAm). The activation energy observed with the novel, NEAAm-based polymer chain was 68 kJ/mol, similar to that found with the NIPAAm-based polymer chain and normal (no Ru catalyst incorporated in the polymer) BZ reaction.
Preparation and Drug Release Behavior of IPN Hydrogel of Polyethylene Glycol and Octane Succinyl Chitosan
Authors: Tan Fu Neng , He Yuan Yuan , Sui Wei Ping
Published: June 2014

The octane-succinyl-chitosan (C8-SCCHS) was synthesized by modifying chitosan (CHS) , characterized by IR, 1H NMR, WAXD and octane-succinyl-chitosan/polyethylene glycol (C8-SCCHS)/PEG interpenetrating polymer network (IPN) hydrogel was prepared by croslinking of C8-SCCHS and PEG. The swelling behaviors of hydrogels in different pH solutions have been studied. The pH sensibility were researched. Micromorphology of the external surface of the hydrogels were imaged by scanning electron microscopy (SEM). Aciclovir as a model drug to study the performance of their release. The results show that the gels have porous cross-linked network structure, which is beneficial to absorbing water or drug, and have ability of controlled release for aciclovir.
Rheological Properties of all Para-Position Polysulfonamide Spinning Solutions
Authors: Li Hu Min , Zhao Jiong Xin
Published: June 2014

Our previous research showed that the presence of more rigid segments of p-phenylene in the PSA copolymer backbone enhanced the strength and modulus of the fiber. Poly (4,4'-diphenylsulfone terephthalamide) referred to as all para-position PSA, which was synthesised only by 4,4'-diaminodiphenylsulfone (4,4’-DDS) and terephthaloyl chloride (TPC), and it was expected to have best mechanical properties. As it cannot be easily dissolved in common amide-type polar aprotic solvents, N,N-dimethylacetamide (DMAc)/LiCl and DMAc/CaCl2 solvent system was used to solve this problem. Static state rheological properties of all para-position PSA spinning solutions were investigated by measuring the apparent viscosity versus shear rate at different concentrations and temperatures. The effectiveness of cosolvent like LiCl and CaCl2 in the solvent system were investigated, the results showed that LiCl was more effective than CaCl2.
Simulation of the Flow-Induced Crystallization of Polypropylene Based on Molecular Kinetic Model
Authors: Rong Yan , Shi Lei , He Hui Ping , Zhang Lan
Published: June 2014

A model for the isothermal flow-induced crystallization (FIC) of polypropylene melt in a simple shear flow is developed. The model is based on the molecular kinetic theory. The first normal stress difference of the stress tensor, calculated according to a molecular model, is assumed as the driving force of the flow-induced nucleation. Crystallization is described as a spherulitical nucleation and growth process. The theoretical predictions of the evolution of the viscosity in steady shear flow of iPP are in agreement with the experimental findings. The relative influence of the mechanical and thermal phenomena on the crystallization development is then analyzed as a function of the shearing intensity in terms of nucleation density. The results show the enhancement of the crystallization kinetics due to the shearing.
A Novel Synthesis Process of PPTA by Nitrogen Cooling for Reaction Heat Removal
Authors: Li Hong Bin , Shi Wen Ying , Zhang Yu Feng
Published: June 2014

Poly (p-phenylene terephthalamide) (PPTA) was synthesized by different processes including single feeding, batch feeding and inlet nitrogen cooling. The effects of these three processes on reaction heat removal of PPTA polymerization were compared. The degree of reaction heat removal was characterized through the changes of system temperature and stirring rate with reaction time. Results suggested that during the processes of batch feeding and nitrogen cooling, system temperature could be effectively decreased and PPTA yields were both larger than 98 %. It indicated that the exothemic heat could be transferred faster and better and monomers could completely react. The inlet incorporation of nitrogen cooling led to the maximum of inherent viscosity (ηinh) of resulted PPTA. This result indicated that nitrogen cooling could effectively transfer the reaction heat and prolong the gel precipitation time of PPTA.
Effects of Thickness on Resistance Switching Properties of ZnMn2O4 Films Deposited by Magnetron Sputtering
Authors: Wang Hua , Li Zhi Da , Xu Ji Wen , Zhang Yu Pei , Yang Ling , Qiu Wei
Published: June 2014

ZnMn2O4films for resistance random access memory (RRAM) were fabricated on p-Si substrate by magnetron sputtering. The effects of thickness onI-Vcharacteristics, resistance switching behavior and endurance characteristics of ZnMn2O4films were investigated. The ZnMn2O4films with a structure of Ag/ZnMn2O4/p-Si exhibit bipolar resistive switching behavior. With the increase of thickness of ZnMn2O4films from 0.83μm to 2.3μm, both theVONand the number of stable repetition switching cycle increase, but theRHRS/RLRSratio decrease, which indicated that the ZnMn2O4films with a thickness of 0.83μm has the biggestRHRS/RLRSratio and the lowestVONandVOFF, but the worst endurance characteristics.
Study on Internal Quality of Billets for 20CrMnTiH Steel
Authors: Li Hong Guang , Chen Tian Ming , Chen Liang , Wang Jia Qi , Yang Wen Zhong
Published: June 2014

According to the requirement of 20CrMnTiH steel, the effects of casting peed, EMS current intensity and secondary cooling system on internal quality of billets are studied. The results show that, it is beneficial to internal quality control of 20CrMnTiH billets when the casting speed is in the range of 1.2~1.4m/min, and when the current intensity of EMS is 380A, the level of center porosity can be controlled in 1.0, the index of carbon segregation can be controlled in 1.08 and equiax crystal ratio reaches 34.9%. Furthermore, it is beneficial to internal quality improvement when weak secondary cooling system is adopted. With the application of the studies, the quality of billet macrostructure and hardenability can meet the requirement of 20CrMnTiH steel.
Analysis on down Coat Fabric
Authors: Zhang Yu Jing , Wang Chao Long , Xu Hang , Zhang Mei , Han Hong Shuang
Published: June 2014

NO matter what the fabrics of clothing, the first characteristic you need to meet is comfort. For down coat fabrics, they is the has the of the main drilling pile, The main characteristics they need to have are preventing fluffy drilling performance,good permeability, waterproof performance and windproof performance.
Design Principle and Method of Digital Multicolored Warp Jacquard Fabric
Authors: Zhou Jiu , Duan Li Na , Luo Bing Fen
Published: June 2014

“Digital Textile” is the product of combining computer technology and textile technology, and jacquard fabric has been the representative product of advanced textile technology. The multicolored warp jacquard fabric is one of the typical jacquard fabrics. This paper presents standardized design principle and method of digital multicolored warp jacquard fabric based on digital design technology, provides guidelines for setting up digital color model and digital database of fabric weave. And then, the practical research of “digital multicolored warp jacquard fabric” is carried out based on the application of digital design technology and digital production technology. Through improving traditional multicolored warp jacquard fabric and on base of digital design principles, the proposal of standardized design method will greatly increase the development efficiency and added value of such kind of product.
Parameters of High-Density Soft Breathable and Anti-Velvet Fabric Technology
Authors: Han Hong Shuang , Zhang Yu Jing , Sun Dan , Qiao Li Ping , Zhang Mei
Published: June 2014

At present, there are still drilling soft velvet jacket fabric, breathable, coated thick and many other issues, the clothing brand's lack of guidance on the technical parameters of the purchase fabric, so that the domestic high-end brands in soft single layer anti-velvet products domestic market share is far behind foreign brands. Based on the above situation, this paper on the international market of high-end brands such fabrics for data analysis, according to research data to buy produce like cloth, sewn jacket kind of clothing to complete the work and try to verify their anti-velvet, breathable performance, research findings provide proof fabric for further research fellow basic data, reference may be fabric or garment production company's procurement offer.
Research on the Ballistic Performance of UD Cloth/3D Fabric Composite Target
Authors: Yang Hong Wei , Gao Heng , Du Jian Hua , Xu Shen Li
Published: June 2014

The ballistic performance of UD cloth/3D fabric composite targets made of UD cloth and 3D fabric and UD cloth targets made of UD cloth were tested. The deformation of UD cloth is larger than that of 3D woven fabrics after shot and the ballistic performance of 3D woven fabric is weaker than that of UD cloth, but its structural performance and performance of resistance to multiple shoot is better than UD cloth's.
Testing of the Dynamic Permeability and Deformation of Airbag Fabrics
Authors: Gao Xiao Yan , Zhang Peng
Published: June 2014

Three different types of PA66 uncoated airbag fabrics are selected, dynamic permeability and deformation are measured by dynamic air permeability testing measurement. Average dynamic air permeability and exponent of dynamic air permeability are used to describe dynamic permeability; bulging curve and biaxial strain/stress curve are used to describe deformation. Testing results showed great useful to airbag products.
Study of EMISE Ionic Liquids Inhibitor on the Corrosion Behavior of Steel Rebar by Statistical Methods in Alkaline Chloride Solution
Authors: Zhou Xin , Wu Guoxi , Chen Ren
Published: June 2014

The pit corrosion behavior of steel rebar in alkaline chloride solutions without and with EMISE ionic liquids inhibitor were investigated by means of electrochemical noise (EN). The experimental results of electrochemical noise measurement revealed that the pit corrosion was inhibited and corrosion pitting process was retarded significantly. The mechanism of the inhibition effect of the inhibitor was analyzed based upon the combined stochastic theory and shot noise theory using the Weibull distribution and Gumbel distribution function.
Study on Microstructure and Properties of X80 Pipeline Steel
Authors: Huo Xiang Dong , Dong Feng , Li Lie Jun
Published: June 2014

Experimental methods, such as OM, SEM and X-EDS, were used to study the microstructure of X80 pipeline steel. It mainly consists of fine acicular ferrite (AF). X80 pipeline steel possesses high strength and impact energy at-30°C approaches to 400J. Grain refinement and precipitation hardening are the main reasons for high strength, and toughness improvement can be attributed to grain refinement and particular microstructural characteristics of AF.
Interaction Concrete with Acidic Fluids
Authors: Starsev Sergey A. , Shlychkova Darita M. , Petrochenko Olesya A. , Ibraeva Julia A.
Published: June 2014

The recent years studies show, that almost all known building materials are exposed to biological damages, including artificial ones created by man, such as concrete. This largely substances. Currently, the aim of investigating the concrete biological stability in aggressive media and the research for effective ways to improve the biological resistance of concrete structures, are extremely important. In this work were studied the dependence of the concrete strength on the duration of exposure to different concentrations of sulfuric acid : 1-5% , 2-15% , 3-30 % , 4-50 % , 5-70 % , and also the dependence of the polymer mass content on the duration of storage in sulfuric different acid concentrations : 5.1 % , 2-15 % , 3-30 % , 4-50 % , 5-70 %. A method for determining the amount of reacted acid was proposed.
Application of Origin in Material Corrosion Experiment
Authors: Sun Qi Lei , Liu Ze Rui , Rao Huan , Qiao Qiao , Sun Ya Ping
Published: June 2014

By using the electrochemical methods of polarization curves and alternating-current impedance and drawing curves with Origin software as well as fitting and analyzing the data of the analytic experiments, the corrosion law of the carbon steel in stratum water containing CO2 at different temperatures is researched in this paper. The result shows that the material corrosion in the simulated stratum water containing saturated CO2 at different temperatures is active dissolution process and is mainly subjected to the activation control. The temperature rise increases the reaction rate of the reactant in the medium while promoting anode process and cathode process so as to increase the corrosion rate of the carbon steel. And, the auxo-action of the temperature to the cathode process is bigger than the anode process. The examples prove that the Origin software can conveniently draw the curves as well as rapidly and accurately analyze and fit the experiment data. The processing process is convenient and rapid, which can save much time than the manual calculation and works better than other professional mathematical analysis software because it does not need programming.
Effect of New Corrosion Inhibitor on Electrochemical Behavior of Prestressed Steel Wire in Simulated Concrete Pore Solution
Authors: Sun Qi Lei , Liu Ze Rui , Guo Yun Zhu , Liu Feng
Published: June 2014

The polarization curve and AC impedance are used to study the impacts of new corrosion inhibitor on the prestressed steel wire electrochemistry action in the simulated concrete pore solution. The result shows that, the ammonium molybdate, DETA, propylene thiourea, 1,4-butynediol and other compound corrosion inhibitors are positive inhibitory corrosion inhibitors, with the components of passivator and healant of protective oxide film, which can contribute to the formation of a passive film of oxide on the rebar surface, repair the defects of rebar surface, coat the entire rebar with a passive film of oxide with good compactness and stability, prevent the chloride ion from penetration, reduce the free rate of iron ions, and thus achieve the anti-corrosion purpose.
Investigation on Electrochemistry Behavior of Fe-Cr-Ni Alloy in Caustic Solution
Authors: Sun Qi Lei , Liu Ze Rui , Liu Ji Liang , Fang Chong , Zhang Qing Nan
Published: June 2014

Electrochemistry experiments such as polarization curve and alternating-current impedance are adopted to study the electrochemistry behavior of Fe-Cr-Ni alloy (Inconel 690 alloy) in the caustic solution of 50% NaOH +0.3%SiO2+0.3%Na2S2O3. The results show that Inconel 690 alloy appears two anodic passivation areas, the passivation of the alloy elements Cr and Ni mainly contributes to the lower potential passivation area and the higher potential passivation area is mainly attributed to the passivation effect of the alloy elements Fe and Ni, especially the later. When Na2S2O is added into the high-temperature caustic solution, it can accelerate the anodic dissolution of Inconel690 alloy, retard or impede its passivation and decrease the stability of the surface passivation film, which is mainly attributed to the effect of Na2S2O3 on the anodic polarization behavior of Ni.
Research on the Nitriding Effect of Ta-10W with Change of Process Parameters
Authors: Xiong Xin Hong , Chen Jia Lin , Quan Dun Miao , Zhang Qiao Xin
Published: June 2014

Plasma nitriding is a thermochemical treatment method to make the metal surface reinforced. It can be used to significantly improve the surface hardness, abrasion resistance, fatigue strength, corrosion and erosion resistance. This paper presents a study of the influence of nitriding temperature and holding time on the nitriding effect while different nitriding process parameters are adopted on Ta-10W board samples by plasma nitriding technology. The result shows that nitriding temperature is the key parameter to the final effect of nitriding. Samples nitrided at 950oC for 10h get thicker nitride layer and more nitrogen in nitride layer.
Effect of Strain on Microstructures and Mechanical Properties of Warmly Deformed SCRAM Steel for Fusion Application
Authors: Mou Yang , Xue Li Hong , Zhou Qi Lai , Lu Cai Xuan , Yan You Wei
Published: June 2014

The SCRAM steel was processed by warm deformation on Gleeble-3500 thermo-simulation machine. The effect of strain on the microstructures and mechanical properties of SCRAM steel was investigated. The results show that an increase in the strain can result in refining the martensitic laths, increasing the volume fraction of precipitates and the dislocation density in SCRAM steel. The martensitic lath width decreases from 0.83 μm to 0.48 μm and the dislocation density increases from 1.3 × 1015 m-2 to 6.4 × 1015 m-2 in SCRAM steel. The specimen exhibits high ultimate tensile strength and yield strength but low reduction of area and total elongations when the strain (ε) is up to 0.5. The tensile fracture surface observation indicates that dimples become smaller and shallower while tear ridges drastically grow up with the strain increasing.
Numerical Simulation Study on High-Cycle Fatigue Damage for Metals
Authors: Nie Xu Tao , Chen Wan Hua , Wang Yuan Xing
Published: June 2014

High-cycle fatigue damage analysis and life prediction is a most crucial problem in the research field of solid mechanics. Based on the thermodynamic potentials in the framework of thermodynamics a numerical method for high-cycle fatigue damage was studied and provided by using a two-scale damage model. Furthermore, according to the “jump-in-cycles” procedure the numerical simulation of high-cycle fatigue damage was implemented in a user subroutine of ABAQUS software. Finally, a numerical simulation instance of high-cycle fatigue damage was provided and compared with a set of test data, which indicates that the numerical simulation method presented is reasonable and applicable.
Study on the Microstructure and Fracture Mechanism of Stable β Phase Containing Tial Alloy
Authors: Yi Xiang Bin , Rui Zhi Yuan , Feng Rui Cheng , Zuo Yan Rui
Published: June 2014

Study on the Ti-43Al-9V-0.3Y alloys forged microstructure, which added a large amount of β phase stable element. The influence on the mechanical properties and synusia cluster refinement about β phase is analyzed. The test of material static tensile at 700 °C and room temperature is conducted. The results show that the V elements urges the grain size α2 and β phase formation, β phase can inhibit α grain growth effectively. At the same time, its deformation ability can increase the high temperature plastic of the material. Experiments show that the main form of alloy tensile fracture at room temperature was intergranular fracture. Hole proliferation and communicated with each other through layers of crack is the main characteristics of high temperature tensile fracture of the alloy.
The Preparation and Tribological Properties of Graphite Fluoride
Authors: Yan Yu Tao , Wang Rui , Song Wan Li
Published: June 2014

Solid phase method was adopted to prepare the graphite fluoride solid lubricant. The friction and wear properties of graphite fluoride were tested with MMW-1 vertical universal friction and wear testing machine. The phase of graphite fluoride was analyzed with infrared spectrometer. The morphology of friction surface was analyzed with the scanning electron microscope. The results show that graphite fluoride has an excellent antifriction wear-resisting property, to compare with molybdenum sulfide, the anti-friction property increased by 35%, wear resistance increased by 49%. The main wear mechanism of the test specimens are fatigue wear and adhesive wear. The solid lubrication film for graphite fluoride was formed in the friction surface.
Aircraft Composite Structures Fatigue Durability Test Method
Authors: Chen Yue Liang , Lei Yuan Ling , Zhang Yong
Published: June 2014

The mechanism of injury and damage evolution of composite aircraft is complex, traditional methods fatigue test relies on a large number of structural durability test data, not only consume large, but limited applicability. In order to ensure the fatigue of composite structures validated statistically, this article describes the most common methods: Life scatter factor method, load enhancement factor method and ultimate strength method.
The Preparation and Performance Study of Thermal Insulating Materials with Diatomite
Authors: Da Jing , Du Yu Hui , Li Mao Dong , Zhang Cun Bao
Published: June 2014

Diatomite was used as the main material and sodium silicate as the alkali activating solution in this paper. Diatomite light-weigh material was made by chemical foaming method. Compressive strength, density and heat conductivity were used to measure its performances. Results showed that density, compressive strength showed a growth trend while coefficient of thermal conductivity showed the opposite trend with increasing rapid hardening cement and senior gypsum.
The Influences of Additives and Heat Treatment on the Properties of Electroless Plating Ni-W-Mo-P Alloy on the Aluminum
Authors: Yu Zu Xiao , Zheng De Tao , Guo Hong , Liu Yong , Luo Yuan Liang , Deng Chao
Published: June 2014

To improve the wear resistance and anti-corrosion properties of the aluminum, the electroless plating Ni-W-Mo-P alloy on the aluminum is necessary. The influences of heat treatment and additives (stabilizers) on the porosity, deposition rate, corrosion current, corrosion potential, microhardness and wear resistance of electroless plating Ni-W-Mo-P alloy coating, were investigated using electrochemical methods, etc. The results show that the deposition rate and anti-corrosion properties of electroless plating Ni-W-Mo-P are improved when the stabilizers, including KI (1mg/L) and “KIO3 (1mg/L) + Pb (Ac)2 (1mg/L)”, are added into bath, respectively. In addition, the maximum hardness (902 HV) and good wear resistance of Ni-W-Mo-P coatings are obtained when heated at 400°C (1h). However, its corrosion resistance is worse. Its microhardness is also obviously improved after heated at 200°Cfor 6 h, and the microhardness reaches to 950 HV.
Research and Development on the Antiaging Polymer Coatings
Authors: Liu Li Ping , Cao Xiu Feng
Published: June 2014

In recent years, polymer had been used in various situations and its use was increasing year by year. However, weathering was a complex process in which UV light, moisture and temperature variations all contributed to the deterioration of polymer properties. This paper reviewed the aging study progress of polymeric materials in recent years and the research problems. The evaluation methods of aging and antiaging of polymer materials were described, concerning with experiments, determinations and pathways of aging and antiaging. A relatively elaborate synthetical evaluation system of aging and antiaging was established.
New Technology of Electroless Silver Plating on Fly Ash Cenospheres with Thermo-Alkaline Activation
Authors: Li Ya Min , Xu Xing Huo Gang
Published: June 2014

Electroless silver plating on the surface of fly ash cenospheres was prepared by slowly adding the solution of AgNO3 into the mixed solution of D-glucose solution and alkaline solution after thermo-alkaline treatment. The morphology and composition of the silver-coated fly ash cenospheres composite powders were observed and analyzed by using SEM, EDS and XRD, and the influence of pH, loading quantity on silver plating was invested. The results revealed that, with the pH value of plating solution increasing, the precipitation of silver is improved, but led to self-accelerating decomposition if too high, and the influence of loading quantity on silver relative content and electro-conductivity of composite powders is very great. The silver shell of composite particles is even and compact when the pH value is 12.57 and the loading quantity is 4g/L, which resistivity can reach to 0.05Ω•cm.
FE Modeling of Stress Distribution in MAO Coating on TC4 Substrate under Thermal Shock Cyclic Loading
Authors: Zhong Ye Sheng , Shi Li Ping , Li Ming Wei , Yu Jia , Liang Jian Han , Sun Ming Bo , He Xiao Dong
Published: June 2014

A numerical study using finite element analysis (FEA) was performed to investigate the thermal, shear and radial stresses developed in MAO coating on substrate of TC4 under thermal cycle loading. The four-node quadrilateral thermal solid element PLANE55 and four-node quadrilateral structural solid element PLANE42 with axisymmetric option was used to model the temperature distribution and thermal stress field of the MAO coating on TC4 substrates. The thermal stress, radial stress and shear stress along the thickness in film/substrate system are analyzed systematically under different thermal cycle loading. It is found that the thermal stress of MAO coating exhibits a linear relationship with thickness of substrate, but it exhibit a parabolic relationship with the thickness of the coating. The radial stress and shear stress distribution of the coating–substrate combination are also calculated. It is observed that high tensile shear stress of MAO coating on TC4 substrate reduces its adhesive strength but high-compressive shear stress improves its adhesive strength.
Research on Wear Characteristics of CVD Composite Coated Tool in Natural Marble Cutting
Authors: Zhao De Hong , Yan Guang Yu , Wu Qiong
Published: June 2014

The high speed milling test of CVD composite coated tool cutting natural marble is carried out. Measured milling forces of different parameters by the dynamometer and analyzed the influence of different parameters on the cutting force. Observed the wear appearance by the SEM and analyzed the wear mechanism of CVD tool. The results of the experiment show that the cutting force increases along with the cutting depth and feed speed increase, decreases along with the spindle speed and the influence of the cutting depth is the largest. The wear mechanisms of CVD tool when milling the natural marble include the removal of mechanical loss on the tool substrate, oxidation wear and adhesion wear. The removal of mechanical loss and adhesion wear couple with the whole process of CVD composite coated tool.
Densification Behavior and Microstructure Evolution of Laser Surface Melting Processed Silicon-Containing Micro Arc Oxidation Coating
Authors: Yu Jie , Di Shi Chun , Wang Yan , Lv Peng Xiang , Yang Jun Jie
Published: June 2014

The present work investigated the effect of laser surface melting (LSM) process on micro arc oxidation (MAO) coating prepared in silicate electrolytes (Si-MAO) and aluminate electrolytes (Al-MAO). Plasma intensity of laser spots, element content and phase constituents of coatings were analyzed. During LSM remelting process, the formation of heat sources and micro molten pools on the surface of MAO coating were discussed. The results showed that the moderate plasma was formed more easily on the Si-MAO than Al-MAO coating, owing to the temperature threshold of melting oxide layer was decreased for silicon-containing MAO coating during LSM treatment. Besides, the Si-MAO coating of laser-treated had low porosity and smooth surface.
Preparation and Antimicrobial Properties of Surface Antibacterial Layer of Aluminum
Authors: Zhang Yan Mei , Hu Yong , Wang Guo Qing , Gui Ye , Wang Da Fu , Huang Jia Qiang , Jie Xiao Hua
Published: June 2014

Antibacterial layer was prepared on the aluminum surface by anodizing pure Al and electrodepositing Cu in the pores of the anodic aluminum oxide (AAO) membrane. The AAO membrane was generated by a two-step anodization process in oxalic acid solution. The electrodeposition of Cu was conducted in copper sulfate solution using alternating current. The structural characterizations by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and energy-dispersive spectrometer (EDS) show that Cu nanowires with an average diameter of 70 nm are assembled in the pores of the AAO membrane. The tests of antimicrobial properties against two typical bacteria of Escherichia coli (E. Coli) and Staphylococcus aureus (S. Aureus) indicate that surface antibacterial layer of aluminum possesses excellent antimicrobial properties and the maximum value of the antibacterial rate can reach 99.9% both for E. coli and S. aureus.