bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of the Thermal Stabilization Effect of Maleic Anhydride Derivatives on Polyvinyl Chloride
Authors: Liu Jian Ping , Song Xia , Yuan Wei , Wang Xiao Yan
Published: June 2012

Here, we synthesized a series of polymeric thermal stabilizers for polyvinyl chloride (PVC) based on maleic anhydride derivatives, including N-phenylmaleimide (NPMI), N-p-chlorophenyl maleimide (NCIPMI), N-p-nitrophenyl maleimide (NNOPMI), dibutyltin maleate (DBTM) and dioctyltin maleate (DOTM). Five specimens were prepared by mixing and rolling through a blending machine and a double-roller mixer, respectively. These samples were first subjected to thermal degradation in a 180°C hot oven, and fractions were collected every 10 min, followed by spotting on a slip of test paper. From the degree of color change in the test paper, the influences of these compounds on the thermal stability of PVC were estimated and such mechanisms were also discussed.
Synthesis of Magnetic Fe3O4@TiO2 Nanocomposite and its Photocatalytic Property
Authors: Wang Ding Zhen , An Li Na , Zhang Xiao Bo , Li Xiao Yun , Shi Jianjun
Published: June 2012

A facile hydrothermal method has been developed for synthesis of nanocapsual-shaped α-Fe2O3 using FeCl3•6H2O as iron source, 4, 4–bipyridine and thiourea as surfactant, and then the above α-Fe2O3 sample’s outer surface were coated with TiO2 and obtained nanocomposite of α-Fe2O3@TiO2. Magnetic nanocomposite (Fe3O4@ TiO2) were obtained by a reduction process with the above α-Fe2O3@ TiO2 products as starting materials by hydrothermal synthesis method using hydrazine hydrate as reductant. The as-prepared Fe3O4@TiO2 samples have good photocatalytic activity and it can photocatalyze RhB at the condition of the external magnetic field
Discussion upon the Draft Ratio Affecting PEN-PPS Filaments
Authors: Zhang Ting Ting , Yu Yan Ping , Zhou Ping
Published: June 2012

PEN and PPS resin sections in certain proportion are blended together physically in order to produce filaments, which constantly go through the drafts so as to be converted into FDY. In this article, the effect of draft ratios to the strain and the shrinkage ratio of PEN-PPS FDY will mainly be discussed.
Synthesis and Phase Behavior of Polysiloxane Nematic Liquid Crystal Elastomers
Authors: Jia Ying Gang , Song Kun Ming , Zhang Bao Yan
Published: June 2012

This paper describes the synthesis of new side chain nematic liquid crystalline elastomers (LCEs) by a one-step hydrosilication reaction. The phase behavior and mesomorphism were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and x-ray diffraction (XRD). The effect of the content of crosslinking units on the phase behavior and mesomorphism of elastomers P1 – P8 was discussed. The nematic LCEs exhibit elasticity, reversible phase transitions, and nematic thread texture. The experimental results demonstrate that the glass transition temperature and isotropic temperature of nematic LCEs decreased with increasing the content of crosslinking unit.
Preparation and Characterization of Elastomers Based on Polydimethylsiloxane/Poly(methyl methacrylate) Blends
Authors: Zhang Nai Qiang , Dong Jian , Chen Hong Yu
Published: June 2012

Polydimethylsiloxane/poly (methyl methacrylate) (PDMS/PMMA) blends were prepared by radical copolymerization of methyl methacrylate (MMA) and divinylbenzene (DVB) in the presence of PDMS. Elastomers based on PDMS/PMMA blends were formed by cross-linking PDMS with methyltriethoxysilane (MTES). Mechanical property measurements show that the elastomers thus formed exhibit superior tensile strength with respect to general room temperature vulcanized silicone elastomers containing silica. Moreover, investigations were carried out on the elastomers by extraction, scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) measurements. SEM shows that the elastomer has a microphase-separated structure consisting of dispersed PMMA domains within a continuous PDMS matrix. DSC result shows that the elastomers display two glass transition temperatures and confirm the incompatible nature of PDMS and PMMA.
Characterization and Modification of Nitrile Rubber in the Transformer Oil
Authors: Zhang Song , Sun Mo Ran , Tang Li Wen , Hu Fang , Zhang Chun Hua , Miao Yu Hua , Zhang Yuan
Published: June 2012

The thermal aging experiments on nitrile rubber (NBR) and modified NBR were carried out in 25# transformer oil. Both of the content of CH4, microstructure, morphology and mechanics characterization was analyzed by Gas Chromatography (GC), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and Servo Control material testing machine, respectively. The results shows that the amount of CH4 released from the modified NBR is less than original NBR, and the mechanics characterization of the modified NBR is also satisfied with the application requirements.
The Research of EVA to PLA/E-AA-GMA Blend Materials Toughening
Authors: Yuan Wei , Liu Jian Ping , Song Xia , Yan Hong Mei
Published: June 2012

The toughening modification of PLA(polylactic acid) and PLA/ethylene-maleic anhydride-methylacrylic acid glycerid shrink commonly terpolymer (E-AA-GMA) with different proportions of EVA was studied in the paper.We tested the breaking elongation rate and impact strength of the modified materials. The results showed that EVA had toughening role for PLA , and the toughening present a trend of improving slowly along with EVA increased. The EVA's toughening effect was more apparent when PLA with the compatibilizer (E-AA-GMA).The results of SEM analysis showed that the compatibility of blend material with the compatibilizer was better than the one without.
Effect of CMCS on Vulcanization Kinetics of Natural Rubber
Authors: Wang Yong Zhou , Gui Hong Xing , Chen Tao , Huang Hong Hai , Zhang Fu Quan , Zeng Ri Zhong
Published: June 2012

In this work, effect of carboxymethyl chitosan (CMCS) on vulcanization kinetics of natural rubber was studied using the Rheometer MDR2000.The results showed that both the rate constants of induction period and curing period of natural rubber (K-N) was greater than that of natural rubber added CMCS and the dosage is 0.05% of fresh latex (CMCS-1), but less than that of natural rubber added CMCS and the dosage is 0.1% of fresh latex (CMCS-2), and the activation energy 100.8kJ/mol of induction period of K-N is greater than the activation energy 96.7kJ/mol, 93.7kJ/mol of induction period of CMCS-1, CMCS-2, respectively and that the activation energy 104.4 kJ/mol of curing period of K-N is less than the activation energy111.9kJ/mol of curing period of CMCS-1, and bigger than the activation energy 103.4 of CMCS-2 at the same temperature.
Influence of Chiral Maltose on the Mesomorphic Properties of Main-Chain Liquid-Crystalline Polymers
Authors: Tian Mei , Guo Lu Lu , Yao Dan Shu , Hu Jian She , He Xiao Zhi , Wang Hong Guang
Published: June 2012

A series of main-chain liquid-crystalline polymers containing maltose were synthesized by interfacial condensation reactions of sebacyl chloride, 4,4’-Dihydroxy-2,2’-dimethyl Benzalazine(DDBA), and 1-O-[4´-O-(α-D-glucopyranosyl)-ß-D-glucopyranosyl]-methanol(MM). The effects of MM on characteristics of liquid-crystalline properties were studied. P1- P3 exhibited nematic mesophase on heating and cooling cycle, while P4- P7 exhibited both chiral smectic A and nematic mesophases on heating cycle and nematic mesophase on cooling cycle. P8 did not exhibit any mesophase on heating and cooling cycle. The glass-transition temperature decreased with increasing concentration of MM.
Manufacturing of Porous Biomaterials for Dental Implant Applications through Selective Laser Melting
Authors: Cardaropoli Francesco , Alfieri Vittorio , Caiazzo Fabrizia , Sergi Vincenzo
Published: June 2012

The paper discusses the possibility of manufacturing dental implants through Selective Laser Melting (SLM) of a Ti-6Al-4V alloy powder. Among all possible biomaterials, this alloy is widely used in biomedical applications due to high biocompatibility. Selective Laser Melting allows to obtain biomaterials with peculiar characteristics in terms of porosity gradient, roughness, customized geometry, and mechanical properties. Influence of input process parameters on porosity and analysis of Selective Laser Melting capabilities in implant dentistry have been focused. Porosity is a key parameter in dental implants as it affects stiffness, which is related to Young’s modulus. Ti-6Al-4V bulk material presents a Young’s modulus of 110 GPa, whereas the bone one ranges from 10 to 26 GPa. The relative difference of mechanical properties causes the phenomenon of stress shielding, which has a detrimental effect on the longevity of dental implants. Total porosity is important in reducing the effective modulus of porous metals. Biomaterials specimens obtained during experimental phase have been examined in terms of porosity (in inverse ratio to relative density), microstructure, microhardness and roughness. According to test results discussed in this paper, Selective Laser Melting is proved to be an efficient technology for the construction of Ti-6Al-4V dental implants, because biomaterials with adequate properties can be obtained changing processing parameters. Other fabrication techniques fail to produce biomaterials for dental implants with the desired features.
Magnetism Study of Spin Correlations in Bi0.5Ca0.5MnO3
Authors: Wang Qiang
Published: June 2012

Magnetic properties of polycrystalline Bi0.5Ca0.5MnO3 are investigated by means of magnetization and electron spin resonance (ESR). The charge ordering (CO) and antiferromagnetic (AFM) transitions are determined from the temperature dependence of magnetization and ESR parameters. It is found that weak ferromagnetic (FM) spin correlations exist in the paramagnetic (PM) state. With temperature decrease, FM spin correlations are suppressed by gradually increased AFM spin correlations in the CO state and frozen in the long range AFM state at the AFM transition temperature TN. Our study suggests that the competition between FM and AFM spin correlations is accompanied by a change of spin-orbit coupling and spin-lattice interaction.
Synthesis and Fluorescence Property of Novel Zn2+ Schiff Base Complex
Authors: Wang Li Hua , Wang Yong Li , Hou Zhan Zhong , Liu Yan Zhu
Published: June 2012

The complex of ZnL2Cl4 was synthesized by using zinc chloride hydrate and ligand 2-[(4-Methylpiperazin-1-yl)iminomethyl]phenol(L) under reflux conditions and anhydrous ethanol as solvent. The complex was characterized by elemental analysis, Infrared spectroscopy, solid fluorescence. Experimental results showed that the free ligand was thermally stable, and emitted intensive blue fluorescence at the peak wavelength of 493 nm. Compared with the fluorescent emission of free ligand, the complex of ZnL2Cl4 is blue-shifted to 448 nm in solid-state and exhibiting stronger blue fluorescence.
Oxygen Content Change Characters and the Influence Superconductivity in the Doped YBCO Systems
Authors: Huang Yan Qin
Published: June 2012

The YBa2Cu3-x(doped element)xO7-δ samples were prepared by solid-state reactions and studied by means of XRD, positron annihilation technique and simulation calculation. The results show the local electron density ne saturation and variations of oxygen content, which can be explained by the cluster effect. Another important new result is that the superconductivity does not depend directly on the valence electron density with different dopant. The Tc seems to lose the association with the ne variation. The dopants can be regarded as a kind of defects is similarly an adding or a losing oxygen ion. Oxygen interstitials reflect fractal distributions of dopants. The oxygen content and distribution reflect the superconductivity of the samples.
Research on Two-Stage Three-Phase Photovoltaic Grid-Connected System
Authors: Zhou Xiao Jie , Ruan Yi
Published: June 2012

Nowadays the penetration of PV-generated power energy into the utility grid is increasing exponentially. This paper focuses on two-stage three-phase grid-connected PV systems, which includes modeling of three-phase grid-connected PV systems, grid-connected control strategy of inverter. The inverter based on the grid-voltage oriented vector control used SVPWM-based synchronous current vector PI controllers to control the grid-current of the common point in three-phase grid-connected system. Theoretic analysis and experimental results on a 2.5KW prototype verify the presented algorithm.
Recent Progress in Developing Magnetic Properties of Mn-Doped ZnO Diluted Magnetic Semiconductors
Authors: Zhang Yu , Li Tong , Wang Ya Xin , Zhao Xin Wei
Published: June 2012

The discovery of ferromagnetism (FM) in wide band-gap semiconductors doped with transition metals (TM), known as DMSs, has attracted much interest. Among DMSs, the system of Mn-doped ZnO is considered as the most promising candidates. This paper focuses primarily on the recent progress in the experimental studies of ZnO:Mn DMSs.
Electrogenerated Chemiluminescence and Sensory Property of Rubrene Microparticles Immobilized on ITO Electrode
Authors: Xiao De Bao , Liu Li Li , Gu Zhan Jun
Published: June 2012

We have prepared the rubrene microparticles through a solvent evaporation process, during which the as-prepared microparticles were immobilized directly onto ITO electrode. It is found that the rubrene microparticles exhibit strong electrochemiluminescent emission in the presence of the co-reactant tripropylamine. The rubrene microparticles can be employed as an electrochemiluminescent sensor, chemically and biologically, for detection of methylene blue and glucose. This work demonstrates that the microstructured architecture of electroluminescent organic molecule is applicable as emitter in electrochemiluminescent sensor.
The Two-Photon Excited Fluorescence of Pyrazine Derivatives
Authors: Diao Li Xiao , Cui Yue Zhi , Meng Xiang Jian , Liu Xing Wu
Published: June 2012

A series of multi-branched pyrazine derivatives have been synthesized, of which, the two-branched one with para-branching pattern shows much enhanced two-photon absorption cross section (σ) than that with meta-branching pattern (1.8 times). The three-branched pyrazine derivative, in which the branches are at ortho- or para-position, show strong two-photon absorption properties (σ=753GM), while its s-triazine analogue TSTA, with all the branches in meta-position, exhibit too weak two-photon excited fluorescence to be detected. These results indicate great effects of branching pattern on two-photon absorption.
Temperature Dependent Characteristics of 1D Photonic Crystal with Defects
Authors: Wang Hui Bo , Tong Kai , Wang Mei Ting , Guo Chao Cong
Published: June 2012

When the temperature is changed, due to the influence of the thermal expansion effect and thermo-optic effect, the thickness and refractive index of each layer of medium of photonic crystal will be Varied. As shown by optical resonators theory, the drift amount of the wavelength has a linear relationship with the variation of temperature. The electron beam lithography technology (EBL) and induction coupling plasma(ICP) etching were used for making the PCs with 1550nm central wavelength. An experiment mode is constructed for analyzing temperature characteristic of one-dimensional PCs, and then PCs is experimented at low temperature and high temperature. It can be found by experiment that, as the temperature changes, the central wavelength of photonic crystal has a linear relationship with the temperature, the drift amount of central wavelength at the low temperature is 0.072nm/°C,the drift amount at the high temperature is 0.076nm/°C,and the 3dB bandwidth of transmission spectrum of photonic crystal has no significant change, the spectral shape is changed very little.
A New Design of Photonic Crystal Fiber with Fattened Dispersion and Low Effective Mode Area
Authors: Li Di , Xu Qiang , Yuan Du Qi , Duan Xu Chao
Published: June 2012

We propose a novel type of photonic crystal fiber with low fattened dispersion and high nonlinearity for four wave mixing. The dispersion and nonlinearity coefficient are investigated simultaneously by using the full vectorial finite element method with anisotropic perfectly matched layers. The optimized result has been obtained by adjusting the design parameter of the proposed fiber, which has dispersion is -1.53 ps•nm−1 km−1 at wavelength of 1.55μm, and in addition the relatively small effective mode area of 2.23μm2 is obtained at the same wavelength, which will induce higher nonlinearity coefficient is close 54.8 W-1• km-1 at the wavelength of 1.55μm. The proposed PCF is suitable for applications as a chromatic dispersion controller, dispersion compensator, or as candidate for the nonlinear optical systems because of its small effective mode area.
Giant Magnetoresistance in (Ni60Co30Fe10/Cu) Trilayer Growth by Opposed Target Magnetron Sputtering
Authors: Ramli  , Djamal Mitra , Haryanto Freddy , Viridi Sparisoma , Khairurrijal Khairurrijal
Published: June 2012

The giant magnetoresistance thin film of (Ni60Co30Fe10/Cu) trilayer were grown onto Si (100) substrate by dc-opposed target magnetron sputtering (dc-OTMS) technique. The growth parameters are: temperature of 100 0C, applied voltage of 600 volt, flow rate of Ar gas of 100 sccm, and growth pressure of 5.2 x10-1 Torr. The effects of Cu layer thickness and NiCoFe layer thickness on giant magnetoresistance (GMR) property of (Ni60Co30Fe10/Cu) trilayer were studied. We have found that the giant magnetoresistance (GMR) ratio of the sample was varied depend on the non-magnetic (Cu) layer thickness. The variation of Cu layer thickness presents an oscillatory behavior of GMR ratio. This oscillation reflects the exchange coupling oscillations between ferromagnetic and antiferromagnetic states, which are caused by an oscillation in the sign of the interlayer exchange coupling between ferromagnetic layers. The GMR ratio is change with increasing of NiCoFe layer thickness and presents GMR ratio of 70.0 % at tNiCoFe = 62.5 nm.
Synthesis and Luminescence Property of Poly(phenylenevinylene) with Alkoxyl Substituents under the Ultrasonic Irradiation
Authors: Ding Wen , Si Jin Hai , Yun Feng
Published: June 2012

In this paper, poly [(2-methoxyl-5-octyloxy) Phenylene Vinylene] (MO-PPV) was synthesized by Gilch route under ultrasonic irradiation. The molecular structure, thin film and luminescence property examined through FT-IR, SEm, AFM, UV-Vis spectroscopy and fluorescent spectroscopy, the results showed that the ‘cavitations effect’ caused by the ultrasonic irradiation not only accelerate the reaction speed but also reduce structural defects of the polymer thin film, the synthesized MO-PPV is free of gelatins which is harmful for the polymer’s thin films act as active layer in polymer light-emitting diodes (PLED).
A Study on Gadolinium Sensitized Chemiluminescence System
Authors: Yang Chi , Ren Nai Lin
Published: June 2012

A new chemiluminescence system was built by using gadolinium as sensitizer, and the analysis capabilities of this system was tested as below. The method is based on chemluminescence of Ce (IV)-SO32- sensitized by Gd3+-OFLX. The effects of some critical experimental conditions were discussed and the optimum conditions for chemluminescence emission were investigated. The linear relationship between the relative chemiluminescence intensity and the concentration of OFLX is in the range of 2×10-9 g/mL～5×10-7 g/mL with a detection limit of 1.0×10-9g/mL .The relative standard deviation is 2.8% (n=11) for a level of 5.0×10-7 g/mL. The method has been applied to the analysis of OFLX in tablets with satisfactory results.
Influence of Gd3+ Doping Quantity on Magnetic Performance of Co2Z Hexaferrite
Authors: Yu Li Hua , Yao Jing , Feng Ze Kun , Huang Ai Ping
Published: June 2012

Co2Z type planar hexaferrite doping of Gd3+ 2CoO·3BaO ·xGd2O3·(10.8-x) Fe2O3 is made with common production process of cermet. The paper studies the influence of Gd2O3 doping quantity on microstructure and magnetic performance of Co2Z type planar hexaferrite. The result indicates that Gd3+ doped Co2Z type ferrite still keeps structure of Z type planar hexagonal, when the doping quantity x=0.025, the magnetic performance in ultrahigh frequency will get improved, the initial permeability can grow to 16, and the cut-off frequency will also relatively reduce to the lowest value 1.965GHz.
Ascertainment of the Figure of Merit for the State-of-the-Art Thermoelectric Materials via Temperature
Authors: Liu Ya Jie , Zhu Ning
Published: June 2012

An effective numerical method to predict quantitatively the relation between the dimensionless figure of merit of the state-of-the-art thermoelectric materials with the temperature was investigated by look around for some fitting mathematical functions. The simulative results agree with the observed data very well that the minimum correlation coefficient and the maximum average relative errors between them are 0.9767 and 4.35 % respectively. The high light of this work is that the regular pattern of the dimensionless figure of merit of the state-of-the-art thermoelectric materials dependence temperature appears Gaussian. This conclusion may be an available tip to the the theoretical physicist to build or modify some theoretical model that used to explain the physical mechanisms of the thermoelectric materials.
Current-Voltage Characterization on Au-DNA-Au Junctions under the Influence of Magnetic Field
Authors: Mahmoudy Khatir Nadia , Banihashemian Seyedeh Maryam , Periasamy Vengadesh , Abd Majid Wan Haliza , Rahman Saadah Abdul
Published: June 2012

We utilized Deoxyribonucleic acid (DNA) strands immobilized between a metal gap and its behavior was investigated. The DNA strands were initially prepared using the PCR method while gaps of 10.00 μm lengths were created on gold layer deposited onto silicon substrate. Once immobilized, current-voltage characterization was carried out on the Au-DNA-Au structure fabricated under the presence and absence of magnetic field. Experimental results clearly highlight the behavior of the DNA strands similar to semiconductor materials. An exponential decrease observed in the current in presence of external magnetic field suggests possible future application as a magnetic sensor.
The Application of Symmetrical Equation of Diffracted Wavevectors in Integral Theory of Gratings
Authors: Gao Jian Xiang , Zhang Fang Cheng
Published: June 2012

The integral theory for electromagnetic theory of gratings, which has complex mathematical tool and long computation cost, is needed to improve computing speed of the algorithm. A very shot-cut equation, which is called symmetrical equation of diffracted wavevectors by us, is presented. It makes the number of Green’s function expansion terms shorter and simplifies the integral kernel by taking into account its symmetry. Take the grating in Littrow mount for computing example, because of applying this equation, the computation cost of integral theory which has good convergence, is shorten to 1/2 to 2/5. This work modifies the integral theory and improves its computing speed.
Two-Photon Luminescence in Yb:YAG
Authors: Peng Chih Hao , Liu H. T. , Wu K. T. , Chen Y. F. , Chou Hsiung , Jiang I Min
Published: June 2012

This work studies the two-photon luminescence spectra of a Yb3+ doped YAG crystal grown using the Czochralski method. To study the spectral performance of a 50 at.% Yb:YAG crystal, intense green light (centered at about 544nm) was generated by the crystal upon excitation using a 973nm InGaAs LD pump source. The luminescence spectra were obtained for various Yb concentrations and the emission intensity were plotted versus Yb3+ concentration. The green emission light attributed to Yb3+ two-photon transition.
New Luminescent Mesoporous Material Covalent Bonded with Europium (III) Organic/Inorganic/Polymeric Hybrid
Authors: Li Ying , Wang Xia , Chian Wei , Wang Jie Lin , Chang Pei Pei , Liu Dong , Jin Zhao , Li Xiao Qing
Published: June 2012

Luminescent ternary organic-inorganic-polymeric mesoporous hybrid material Eu-(PA-SBA-15)-PMAA was prepared in situ through hydrothermal and solvothermal method based on hydrolysis and co-polycondensation. The organic ligand PA (O-phthalic anhydride) was modified by silane coupling reagent APS ((3-aminopropyl) triethoxysilane) to generate the precursor PA-Si which was used to form the ordered inorganic Si-O networks through direct co-hydrolysis and co-polycondensation process with SBA-15 in the presence of Pluronic P123 surfactant as a template. TEOS (tetraethoxysilane) was used to promote the hydrolysis and condensation process. Eu3+ complex Eu(PA-Si)3 was covalently linked to the ordered mesoporous SBA-15 and organic polymer PMMA which was synthesized by addition polymerization reaction of the monomer MMA (methyl methacrylate) in the presence of the initiator BPO (benzoyl peroxide). Moreover, the binary organic-inorganic mesoporous hybrid material Eu (PA-SBA-15)3 without polymer was also synthesized simultaneously for comparison. The luminescence properties of the hybrids were characterized in detail. The results show the ternary hybrid exhibits stronger emission intensity, longer lifetime and higher quantum efficiency than binary one which proves that the introduction of the organic polymer PMMA brings improvement to the hybrid system.
The Research on Wear Resistant Polyurethane Hose Capable of Being Flat
Authors: Guo Kui , Zhang Zhen Hui , Zhou Hua
Published: June 2012

Base on the blending modification and the toughness reinforcing method,choosing the thermoplastic poly-ether-polyurethane as the glue stocks of the inner layer, reinforcing the intension of the fiber layer,using the thermoplastic polyurethane and EPDM blending test，imprvoing the production technology of the inner layer and the outer layer,making imprvoing for the wear-resistant of layflat polyurethane hose.
Functionally Graded Plates under Thermal and Moisture Effects
Authors: Lee Chang Yull , Kim Ji Hwan
Published: June 2012

The postbucking behaviors of Functionally Graded Material (FGM) plate in hygrothermal environments are investigated. The material properties of FGM change continuously in the thickness direction according to the volume fractions of the materials. The formulations are based on the First-order Shear Deformation Theory (FSDT) and von Karman strain-displacement relations are applied. Governing equations are derived by using the principle of virtual work and numerical solutions are solved through a finite element method. Newton-Raphson technique is adopted to analyze the thermal postbuckling behavior of the model. Furthermore, moisture effects on the model are significantly appeared due to the increase of the volume fraction index of the materials.
Study on Release of Anion Concentration about Negative Oxygen Ions Fabric
Authors: Zhang Hong Xia , Wu Xian Xian , Tao Rong , Zhu Cheng Yan , Bi Jian Wei
Published: June 2012

In order to study the influence of factors on the released anion concentration, the factors include the fiber content of negative oxygen ions, warp and weft density, organizational structure and friction time. Fabrics for A and B series were blended with modified polyester negative oxygen ions fiber and viscose fiber in different blending ratio. The released anion concentration were tested and analyzed. From the test results, following conclusions can be gotten. 1) In the same circumstance of other process conditions, with increasing of negative oxygen ions fiber content, the released anion concentration increased; 2) The honeycomb weave fabric B5 released the highest anion concentration in the other same process conditions, while plain weave fabric B1 released the least concentration; 3) More negative oxygen ions were produced when the warp and weft density were greater; 4) As the time of friction increased, the released anion concentration of fabric was increased until it reached a stable value; 5) Organizational structure had a great effect on releasing anion concentration through friction between woven fabric of negative oxygen ions and other knitted fabric. When the organization structure had bumpy effect, it was more conducive to release negative oxygen ions.
Microstructure and Mechanical Properties of In Situ TiB2/6061 Composites
Authors: Zhong Long Hua , Zhao Yu Tao , Zhang Song Li , Wen Rong
Published: June 2012

In situ TiB2/6061 composites have been successfully synthesized through chemical reaction between 6061 master alloy, Al-3B master alloy and Ti powder. The composites fabricated by direct melt mixing method was investigated by Scanning Electron Microscope (SEM), Energy Dispersive x-ray Spectroscopy (EDS) and X-Ray Diffraction (XRD), The results shown the existence of TiB2 particles. The size of most TiB2 particles were just in micron level, and even reached to sub-micron level. The increase in microhardness and tensile strength for the as-prepared composites with 5% particulate volume fraction (PVF) are up to 26.8% and 51.2% respectively.
Influence of Construction of Textile Material on Performance of Warp Sizing
Authors: Tong Yun
Published: June 2012

Warp sizing is the precondition of weaving for most textile material. A key fact discussed in this paper is capillary effect, by means of a series of experiments known as observation of suction lift of various types of yarn under non-wetting and wetting condition, a longitudinal and cross section of warp under microscope, tensile breaking strength of sized warp compared between non-wetting sized warp and pre-wetting sized warp, desizing time, etc, it is concluded that the capillary effect is affected by textile material construction such as linear density of warp, spinning process, yarn twist, absorbency .etc, is inherent driving force for size glue penetrating into warp so as to make weaving possible, pre-wetting process will be greatly helpful for penetrating in warp slashing, resulted from capillary effect being enhanced
Facile Synthesis of near-Infrared-Emitting Water-Dispersed CdHgTe/CdS/ZnS Core/Shell/Shell Quantum Dots
Authors: Li Chen Gui , Ye Chao , Yu Jie , Zhou Fang , Zhong Wen Ying , Yan Zheng Yu , Hu Yu Zhu
Published: June 2012

We report the synthesis and characterization of highly luminescent quantum dots consisting of CdHgTe cores protected with double inorganic shells (core−shell−shell quantum dots). The outer ZnS shell provides efficient confinement of electron and hole wave functions inside the quantum dots as well as high photochemical stability. Introducing the middle shell sandwiched between CdHgTe core and ZnS outer shell allows considerable reducing strain inside nanocrystals because CdS had the lattice parameter intermediate to those of CdHgTe and ZnS. Preferential growth of the middle CdS shell in one crystallographic direction allows engineering the shape and luminescence polarization of the core−shell−shell quantum dots.
Study on the Fiber Bending Deformation during Knitting Process
Authors: Yang Kun , Liu Song
Published: June 2012

In this paper, a method for evaluating the curvature radius of conductive knitted fabrics was reported. Plain knitted fabrics were made by using conductive fibers on a hand-driven V-bed flat knitting machine. The needle movement and loop formation during the knitting action were recorded, and then these images were analyzed by using the image processing approach for obtaining the curvature radius of needle loop. Finally, the knitting actions of two conductive fibers under two conditions were evaluated.
Sound Insulation Property of Warp Knitted Fabrics
Authors: Yang Kun , Ye Tian Sheng
Published: June 2012

In this study, a test device was designed and established for evaluating the sound insulation of fabrics, and six warp knitted fabrics with different parameters were chosen and tested. The results show that these fabrics have different sound insulation effect to various sound wave frequencies, and normally, the fabric with solid structure has better sound insulation effect that the fabric with thin structure, but the effect of latter fabric can be improved by using some treatments.
Creation Based on Superhydrophobic Soot Waterproofing Materials Obtained in Flames
Authors: Nazhipkyzy Meruyert , Lesbaye Bakhytzhan T. , Mansurov Zulkhair A. , Arapova Aigerim K. , Baidaulova Dinara K. , Solovyova Milana G. , Prikhodko Nikolay G.
Published: June 2012

In this paper we present a study of the formation of soot, which has the properties of the superhydrophobic surface of a silicon substrate. Found that the soot content in the putty from 1 to 8% increase in the hydrophobic properties of plaster.
The Tribological Properties of Several PTFE Based Self-Lubricating Composites in Vacuum
Authors: Zheng Jun , Zhou Hui , Wan Zhi Hua , Sang Rui Peng
Published: June 2012

Five commercial PTFE based self-lubricating composites were selected for candidates in space. The hardness was measured by depth-sensing indentation in CMC mode. The tribological properties of composites sliding against a 440C steel balls were investigated using a vacuum rotational ball-on-disc apparatus. The result show the hardness of Rulon 945, Rulon XL, GR 0348, D 5813 and LW 155 are about 62.01 MPa, 45.42 MPa, 84.62 MPa, 116.59 MPa and 569.40 MPa, which are higher than pure PTFE composite. The friction coefficient of Rulon 945, Rulon XL,GR 0348, D 5813, LW 155 obtained in vacuum are, 0.08 to 0.20, 0.06 to 0.10, 0.05 to 0.10, 0.06 to 0.10 and 0.05 to 0.15. Rulon XL, GR 0348 and D 5813 show very stable friction level around 0.08. For volumetric wear rate, D 5813 have the biggest volumetric wear rate of 2.36×10-7mm3/mm, which is twelve times of Rulon 945 and nearly five times of Rulon XL, GR 0348 and LW 155. Rulon XL and GR 0348 have the best friction and wear properties.
Physical Chemistry of Fermentative Hydrogen Production Mechanism
Authors: Na Dong Chen , Li Yong Feng
Published: June 2012

Fermentation Hydrogen producing bacterium is another kind of microbe which can produce hydrogen in metabolic process,and which has a lot of advantages. The paper will discuss the fermentative hydrogen production on the way of Physical chemistry mechanism ,which is oxidation-reduction potential, ionization equilibrium and HCO3¯／CO2 (aq) System.
A Geometric Analysis of the Loop Form of a Tricot Stitch Knitted Fabric
Authors: Guo Zheng , Chen Jin Jing , You Jin Zhang
Published: June 2012

A tricot stitch knitted fabric has been used in medical stents, such as tracheal stents and external stents. Both geometric form and porosity of the stent are key factors in clinical use. One loop of the tricot stitch knitted fabric was divided into seven parts, and the loop form was analyzed. The geometric characteristics under extreme condition for both latitudinal and longitudinal extension were given. The relationships between geometrical parameters of a tricot stitch knitted fabric were obtained.
Analysis of the Influence of Static Flow Resistance on the Sound Absorption Properties of Aluminum Foam
Authors: Bao Huai Qian , Zhang Ning , Hou Xue Gang
Published: June 2012

For the complexity of the internal microstructure of porous aluminum foam, on the basis of Rayleigh-Kirchhoff circular tube model, taking viscosity loss and thermal transmission, the paper establishes a simplified theoretical model for sound absorption properties of aluminum foam. The paper also calculates and analyzes the influence of Static flow resistance on the sound absorption properties in the rigidity and cavity backing. The results show that the peak frequency moves to lower with the increasing of the thickness of the air layer. What’s more, there is a direct corresponding relation between flow resistance and the best sound absorption frequency range of aluminum foam. In a reasonable range of flow resistance value, the capability of sound absorption reach optimal, Aluminum Foam won’t have fine sound absorption capability if the value of flow resistance is too big or small.
Application of the KH560 on Improving the Interface Fastness of Composites of Starch and Cotton Fiber
Authors: Liu Jin Fa , Wang Hao Na , Cao Gen Yang
Published: June 2012

The interface of cotton and starch is pre-treated in different concentrations of 3-glycidoxypropyltrimethoxysilane (KH560) and Ditin butyl dilaurate (DBD) solutions. The interface fastness has a good linear relation with KH560 concentration changes. And DBD and pre-heating treatment bring on the grafting reaction easier.
Reduced Graphene Oxide Nanosheets Functionalized with Bile Salts as Support for Electrochemical Catalysts
Authors: Sun Zhi Peng , Zhang Wei Qing , Lu Xian Mao
Published: June 2012

Graphene nanosheets functionalized with bile salts (G-bile salts) are obtained through chemical reduction of exfoliated graphite oxide in the presence of deoxycholic acid sodium salt, taurodeoxycholic acid sodium salt, or cholic acid sodium salt. Due to the “facial amphiphilic” structure of bile salt molecules, the G-bile salt composites exhibit excellent dispersibility in water. In addition, G-bile salts decorated with palladium (Pd) nanoparticles (Pd-G-bile salts) are prepared via a facile co-reduction process. The use of the Pd-G-bile salt composites as electrochemical catalysts for formic acid oxidation reaction is demonstrated. Better utilization has been achieved for Pd catalysts dispersed on G-bile salts than those prepared without bile salts.
Study on the Supercritical CO2 Art of Dyeing
Authors: Li Song Yuan , Du Bing , Gao Shi Hui , Wei Ju , Zhao Yu Ping , Zheng Lai Jiu
Published: June 2012

A new water-free dyeing process – Supercritical CO2 art of dyeing was proposed according to the high consumption of water and energy and serious environmental pollution problems. The results indicated that the effects of temperature, pressure and reaction time on dyeing deepness (K/S value) were investigated and the key factor is temperature. The PET fabrics dyed with disperse dyes in Supercritical CO2 were determined and the results showed that the dyeing protects with high dyeing rate and good characteristics, which can meet the requirements of the people on the dyed fabrics pattern and other visual art.
The Dynamics and Governance of Tongxiang Sweater Cluster Based on GVC
Authors: Zhu Wei Ming
Published: June 2012

Tongxiang sweater cluster is considered as a dichotomy driven fashion value chain, for it is driven by, not only the local own brand, but also the international brand buyer. Every link of Tongxiang sweater cluster value chain is analyzed in this paper. Buyer only needs monitoring the supplier which produces some standardization of sweater, because sweater is a kind of standardization of product. The governance of global value chain consists of markets, relational value chains, captive value chains, hierarchy, and the last, modular value chains, to which Tongxiang sweater cluster belongs.
The Study on Properties of Kapok Nonwoven Material
Authors: Li Su Ying , Zhang Heng , Zang Chuan Feng
Published: June 2012

The Nonwoven Material with the steady structures and performances was made with kapok fiber and polyester fiber. The paper discussed the Properties of the kapok Nonwoven Material, the result shows that Nonwoven technology can be used for machining kapok fibers, and hollow degrees of kapok fiber can be kept better using reasonable processes.
Preparation of Polyaniline/SiO2 Composites by Modified Silica Using Succinic Acid
Authors: Li Er Yuan , Wang Xiu Feng , Wang Xue Zhi , Wang Hao
Published: June 2012

Polyaniline/SiO2 composites were prepared by the SiO2 particles whose surface character was modiﬁed by succinic acid. The composites were characterized by Fourier transform infrared (FT–IR) spectroscopy, X–ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM). The results demonstrated that the thermal stability of PANI had improved.
Photocatalytic Degradation of Nanometer TiO2 Sol Composed Fabric to Dye
Authors: Guo Jin , Zhang Jian Fei
Published: June 2012

The TiO2 sol was prepared via sol-gel method. A new reaction system and the relevant technical route were adopted, and TiO2 colloidal sol containing nanoctrystalline anatase was prepared at low temperature, which directly had photocatalytic activity without the typical high-temperature treatment in traditional sol-gel method. The structure and property of Nanometer TiO2 were characterized by Particle Size Distribution, what is more, its effects of ratio of reactants on the catalytic proporty of nanometer TiO2 were analyzed. Nano-TiO2 sol as loaded on the surface of fabric using finishing method，thus nano-TiO2 finished fabrics were obtained and used as photocatalysts for oxidative degradation of Rhodamine B in water. Some factors affecting degradation such as the TiO2 content, dye concentration and reuse of the nano-TiO2 finished fabrics were investigated with respect to the decoloration value. The results showed that increasing molar ratio of water to n-butyl titanate led to a smaller particle size nano-TiO2 sol. Nanometer TiO2 sol composed fabrics have a very good photocatalytic activity on the degradation of dyes, and can be resued for sevral circles. Increasing TiO2 content on the fabric and decreasing the dye concentration led to higher decoloration of the dyes in solution.
Synthesis and Photophysical Characterization of Dendritic 8-Hydroxyquinoline Complexes
Authors: Guo Sen Hui , Li Long , Yang Yu Ping , Yuan Xu Bo
Published: June 2012

Two kinds of dendritic 8-hydroxyquinoline ligands were efficiently prepared by convergent method, and characterized by IR, 1H NMR, 13C NMR and MS. The fluorescent properties of dendritic ligands and their Zn(II) complexs were studied. The results indicate that this new methold is readily, which generates virtually no by-products. All dendritic 8-hydroxyquinoline derivatives have good solubility in most of organic solution. These dendritic derivatives show good fluorescence, which can be anticipated as a type of important functioned materials for OLEDs.
Study on the Wool-Solospun Spinning Technology
Authors: Huang Li Xin
Published: June 2012

Solospun spinning is a new type of wool-spinning methods, Solospun spinning technology principles and characteristics were introduced in the paper, the domestic-manufacture fluted Roller was used on the existing equipment and the production was carried on,In addition to comparing with the traditional ring spinning production ,the structure and performance of two kinds of threads had been tested ， the yarn comprehensive performance judgement was also given.it was proofed that the solospun-spinning yarns was better than the ring spinning yarns.
The Influence of Electrode Materials on the Electrical Degradation Process of Lead Zirconate Titanate under Harsh Operating Environment
Authors: Zheng De Yi , Swingler Jonathan , Weaver Paul M.
Published: June 2012

Piezoelectric materials because their special ability to convert bwteen kinetic energy and electrical energy. Therefore, they are widely applicated in the areas such as sensors, resonators etc. However, the electrical degradation phenomenon of piezoelectric materials will cause the degradation of their performance. The electrode materails has been reported can severely influence the electrical degradation of piezoelectric materials. In this paper, the life time of the lead zirconate titanate capacitors with nickel, gold or silver electrodes are investigated. It is suggested that, the poor migration ability of the electrode elements gives the PZT capacitors a longer lifetime. The reason of no observation of the electrode materials in the capacitor material is also discussed.
Biomimetic Synthesis of Prismatic Calcite Mesocrystals in the Presence of Nonionic Copolymer
Authors: Wu Yi Ping , Wang Xiao Hong , Zhang Qun
Published: June 2012

A triblock copolymer of F127 was used as a model additive to influence the growth of calcium carbonate (CaCO3) in a biomimetic synthesis process. The results demonstrate that F127 preferentially interacted with selected faces of calcite and induces the growth along the crystallographic c direction into prisms with mesocrystal architectures. Although only containing ether-oxygen functional groups, F127 is considered as an analogue to an array of polyanions contributing to the special morphogenesis of CaCO3. Consequently, this result provides a wider sense in the significance of the ether-oxygen groups into biomineralization mechanism and an alternative synthetic strategy for special morphology of CaCO3 materials.
Synthesis and Characterization of Polyacrylates Side-Chain Liquid Crystalline Polymer via Atom Transfer Radical Polymerization
Authors: Jia Ying Gang , Tian Peng , Song Kun Ming , Zhang Bao Yan
Published: June 2012

Atom transfer radical polymerization (ATRP) of methacrylate liquid crystal monomer M (4-((4-(2-(acryloyloxy)ethoxy)benzoyl)oxy)phenyl 4-propylbenzoate) was carried out using CuBr/PMDETA complex as catalyst and 2-bromo-2-methyl-propionic acid ester as initiator. The obtained monomer M and polymer P was characterized via infrared spectroscopy and 1H NMR. The phase behavior and mesomorphism were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and x-ray diffraction (XRD). The molecular weight and the structure of the polymers were identified with gel permeation chromatography and nuclear magnetic resonance.
Synthesis and Spectral Properties of Polymeric Dye from Waste Plastic
Authors: Liu Dan , Liu Jun Long , Zhou Da Peng , Wang Hong Mei , Zhu Zheng Ling
Published: June 2012

Using waste expanded polystyrene as the raw material, the azo polymeric dye (I-III) were prepared via nitration, reduction, diazotization and coupling reactions. The structures of the intermediate products and the polymeric dyes obtained were characterized by the FTIR spectra. By UV-Vis absorption spectrum measurements, the relationship among the maximum absorption wavelength, molecular structure and color of polymeric dye was investigated.
A High-Throughput Screening of N-Carbobenzoxy-L-Tryptophan Imprinted Polymers and their Application for Monolithic Chiral Stationary Phase
Authors: Qi Jian , Guo Li , Sang Hai Feng
Published: June 2012

Molecular imprinting is a technique to prepare polymers with predetermined selectivity, specific recognition and predesigned affinity to a desired molecule. The stability and low cost of molecularly imprinted polymers (MIPs) render them attractive for a broad range of applications. Currently, MIP technique has been widely used in chiral separation. In this study, a series of molecularly imprinted polymers for N-Carbobenzoxy-L-tryptophan (N-Cbz-L-Trp) synthesized in different conditions were prepared in a small scale to simulate the monolithic chiral stationary phases (CSPs) primarily. By coupling in situ processing and batch rebinding evaluation, the type of functional monomers, which likely to affect the chiral selectivity of MIPs, was investigated. It was found that a MIP comprising a mixture of functional monomer 4-vinylpyridine (4-VP) and porogen 1-dodecanol/toluene exhibited the highest binding capacity and chiral selectivity for N-Carbobenzoxy-L-tryptophan. Thereafter, the monolithic MIP synthesized in screened optimum condition is used as chiral stationary phase in HPLC, which shows favourable separating capacity.
Numerical Simulation for the Optimization of the Angle of the Velocity of the Hydrogen in the High Performance Hydrogen Bell-Type Annealers
Authors: Fang Shun Li , Jin Shi Ping , Zhang Yong Xiang , Huang Su Yi , Wen Wu Qi
Published: June 2012

The flow of the hydrogen has played an important role in the heat exchange in the inner bell. In this research, we have studied the volume distribution of the hydrogen in the inner bell through numerical simulation method, and we get the volume distribution law of the hydrogen when we change the axial angle and the tangential angle of the velocity of the hydrogen flowing into the inner bell while we do not change the speed of the hydrogen. This research could provide theory reference for the design and application of the structure of the coil base of the high performance hydrogen bell-type annealers later.