bluuebunny/crossref_metadata_2025 huggingface dataset:
Researches on Flame Retardation and Hygrothermal Aging Properties of PP/PA6/APP/OMMT Composites
Authors: Liu Hai Lin , Yang Chun Ping , Liu Chang Gui , Wu Yu Jiao , Meng Ri Liang
Published: August 2013

PP/PA6/APP/OMMT Nanocomposites were Prepared via One-Step and Two-Step Melt Intercalation. the Flame Retardation, Thermostability, Structure Characters and Hygrothermal Aging Properties of PP/PA6/APP/OMMT Nanocomposites were Studied by UL-94, OI, TG and TEM. the Results Show that Two-Step can Improve the Flame Retardation of PP/PA6/APP/OMMT Nanocomposites; when OMMT Content is 4% or 6%, the Flame Retardation Gets Tofv-0, and the Lois are 32.2% and 32.8% Respectively; OMMT Doesn’t Play an Obvious Role to Hygrothermal Aging of PP/PA6/APP/OMMT Nanocomposites.
Research of Key Techniques to Improve Quality and Yield in Inositol Production Process
Authors: Zhao Li Chun , Zhu Min Peng
Published: August 2013

In inositol’s extraction process, the technological parameters and operational approaches of the following factors have a great influence on the final quality and yield: the quality and condition of raw material, acidolysis pressure, order of feeding and additives, use of neutralizer, removal of impurities in ion exchange section, vacuum degree in concentration section, evaporating temperature, outer steam pressure, purified washing and foreign ion tests. Though experiments, we concluded the key points and theoretical foundations to improve the products quality and yield. The results offer help for the actual production.
Bioactive Component Extraction from Antrodia camphorata Fruiting Body on Artificial Agar Media
Authors: Weng Wen Lu , Lo Hao Min , Chan Shih Jung , Liu Wen Huang
Published: August 2013

Supercritical fluid extraction (carbon dioxide), water extraction and ethanol extraction are used to extract bioactive components from fruiting bodies of Antrodia Camphorata to find out the optimum extraction condition through operation variable changes. Analysis comparisons tell that the best condition for water and ethanol approaches is 95% ethanol as the solvent, 45 °C as the operation temperature and 24 hours for extraction while supercritical fluid extraction prefers 95 % ethanol as the co-solvent, 250 bar as the working pressure and 45 °C as the operation temperature. There exist more and significant low polarity peaks in HPLC detection chromatograms for supercritical fluid extract liquids.
A New Host-Guest Biomaterial Apply for DNA Sequence Electrochemical Detection
Authors: Fan Hao , Feng Cui Han , Lin Yan
Published: August 2013

In this paper, a novel dually-labeled DNA probe (DLP) in a stemloop structure was designed to be labeled at one end with dabcyl, working as a guest molecule, and at its another end with CdS nanoparticle, working as an electrochemical tag to indicate the electrochemical signal of hybridization occurrence. One a-cyclodextrin/multi-walled carbon nanotube modified glassy carbon electrode (a-CD/MCNTs/GCE) was fabricated for the hybridizer capture. The DLP could recognize target DNA through hybridization event between complementary bases in the loop of probe DNA and target DNA. Without binding with target DNA, the DLP kept its stemloop structure which held dabcyl molecule shielded by the loop of probe DNA and CdS nanoparticle. This structure blocked dabcyl from entering the cavity of a-CD on the electrode. Once hybridization happened, the stem-loop structure of hairpin DNA opened and then dabcyl molecule could be easily captured by a-CD on the electrode. Thus, the electrochemical response of the CdS nanoparticle label at the other end of the hybridizer was proportional with the concentration of target DNA.
New Integration Technology on Preparation of Natural Seleniferous Rice Protein Peptide with Enzyme and Ultrasonic-Microwave Synergistic Technology
Authors: Hu Ju Wu , Li Xiong Hui , Xiong Hua
Published: August 2013

The natural seleniferous rice protein peptide was prepared by coupling with mixed-enzymes and ultrasonic-microwave synergistic technology in this paper. The kinds of enzyme was atteined first of all. Then the mathematical model of correlation among enzyme dosage, extraction temperature, extraction time and liquid-solid ratio were established by means of orthogonal experimental design. The optimal extraction conditions were determined as follows, alkali protease dosage 2.0%, extraction temperature 50°C, extraction time 40 min and liquid- solid ratio 7:1(m:g). Under such conditions, the extraction ratio was 72.2%, Se content was 6.88 μg/ml. The method could significantly improve the yield of natural seleniferous rice protein peptide and reduce the extraction time .The rich selenium rice protein peptide provides a very good source of selenium way in order to solve the lack of selenium source.
Effects of Processing on Mechanical Properties of Polypropylene Composites
Authors: Sui Xin , Wang Bao Hui , Wu Hai Ming , Wang Li , Zhao Wei , Li Li , Wu Hong Jun , Yuan Dan Dan
Published: August 2013

Based on the mechanism of processing and molding of multivariate polypropylene composite system, this paper studies the effect of the screw length-to-diameter ratio and the wedge angle of the helix angle of the twin-screw extruder on the properties of elongation at break of polypropylene composite. The relationship between injection temperature and injection pressure of injection molding machine is also analyzed. Experiments show that when length-to-diameter ratio is 30, and wedge angle is 16±5o, the elongation at break of test sample reaches its maximum value and tends to be stable. When melting pressure is 40 MPa and the injection temperature at 190 °C-220 °C, injection molding machine can improve the process flowing property of composite materials.
Water Prehydrolysis of Moso Bamboo Dissolving Pulp
Authors: Gu Tao , Weng Li Qing , Xue Guo Xin
Published: August 2013

The chemical comcomposition and water prehydrolysis of moso bamboo were studied to prepare high grade dissolving pulp. The results indicated that the moso bamboo was an appropriate none-wood material for great dissolving pulp goten as its high cellulose content. By single factor method, the optimum prehydrolysis conditions which were 150°C, 120minutes and 1:8 of liquor-to-wood tatio, were obtained. Based on the optimum conditions, the yield was 90.35%, and the retention rate of cellulose, pentosan, acid accumulator insoluble lignin, and ash were respectively 96.30%, 88.22%, 88.13%, and 11.71%.
Modified Octyl-2-Cyanoacrylate Tissue Adhesive for the Closure of Long Surgical Incisions
Authors: Yuan Ming Wei , Qin Yu Yue , Yuan Ming Long , Li Hong Li
Published: August 2013

Long surgical incisions required application of more flexible cyanoacrylate adhesive to relieve skin tension. A new formulation of octyl-2-cyanoacrylate (OCA) was modified by 0%, 3%, 6% and 9% (w/v) polytrimethylene carbonate (PTMC). The OCA/PTMC adhesives showed higher viscosity and bond strength than OCA monomer. The OCA/6% PTMC adhesive plus subcutaneous suture was used as group A (Treatment group), and the OCA/6% PTMC tissue adhesive alone was used as group B (Control group). 30 days later, there was no apparent scar formation in group A. A linear scar formation still could be seen in group B. The results supported the use of OCA/6% PTMC adhesive alone or adhesive plus subcutaneous suture in long surgical incisions, and the latter maintained better scar formation.
Synthesis and Characterization of CNT/Fe3O4-ZnS Nanocomposites
Authors: Wu Guang Tao , Li Jing , Li Xiu Ming , Zhang Hong Wei , Dong Yun Feng , Deng Yu Wei
Published: August 2013

ZnS was coated on carbon nanotubes (CNTs) that had been previously functionalized with Fe3O4 nanoparticles. The as-synthesized products were characterized by X-ray diffraction (XRD), transmission electronic microscope (TEM) and physical properties measurement system (PPMS). ZnS nanoparticles with sphalerite structure are successfully assembled on the surface of CNTs/Fe3O4 nanocomposites. The CNTs/Fe3O4-ZnS nanocomposites exhibit superparamagnetic behavior with saturation magnetization of 21.25emug1. The as-synthesized nanocomposites have great potential for applications in the field of wastewater treatment, electronic devices, sensors and biotechnology.
The Characterization of a New Antibacterial Polyurethane
Authors: Ti Yang , Wu Jian Ru , Chen Da Jun
Published: August 2013

In this paper, Fe-OCAP/PU blends were prepared. The mechanical properties and thermal stability of the samples were studied by tensile tests and thermogravimetric analysis, respectively. Results showed that the mechanical properties and thermal stability of the samples were improved with the increase of Fe-OCAP content. The antibacterial property of Fe-OCAP and Fe-OCAP/PU films was investigated by agar diifusion method and shake flask method, respectively. Fe-OCAP and Fe-OCAP/PU films showed efficient antibacterial activity against S.aureus.
Dynamic Self-Assembly Process of a Designed Peptide
Authors: Ruan Li Ping , Xing Zhi Hua
Published: August 2013

In this paper, we reported the dynamic self-assembly process of an half-sequence ionic self-complementarity peptide CH3CO-Pro-Ser-Phe-Cys-Phe-Lys-Phe-Glu-Pro-NH2, which could self-assemble into stable nanofibers and formed hydrogel consisting of >99% water. The dynamic self-assembly process was detected by circular dichroism (CD) and atomic force microscopy (AFM). CD spectrum revealed that the mainly contents of the peptide were regular β-sheet structure. The data indicated that though the secondary structure of the peptide formed immediately, the microstructure of the self-assembly process of the designed peptide formed slowly. AFM image illustrated that the self-assembly process was layer-by-layer assembly.
PEG-PLGA Nanoparticle Modified by Transferrin Loading Doxorubicin: In Vitro and In Vivo Studies for Glioma
Authors: Liu Guo Dong , Mao Jin Ning , Sun Tao , Jiang Zhen , Dong Jun , Huang Qiang , Lan Qing
Published: August 2013

Purpose A biodegradable PEG-PLGA nanoparticle (NP) modified by transferrin (Tf) was conceived. Doxorubicin (Dox), a widely used antitumor agent, without passing through the BBB, which limited its utility on glioma, was encapsulated inside (Tf-NP-Dox). Furthermore, its therapeutic efficacy to glioma was evaluated both in vitro and in vivo. Methods Tf-NP-Dox was prepared via modified single emulsion method. Its characterization including size, Drug loading capacity (DLC), entrapment efficiency (EE), Tf number on Tf-NP-Dox surface were estimated. The antitumor efficiency in vitro was evaluated via MTT assay. The transmembrane transportation was evaluated via HPLC assay. The antitumor efficiency in vivo was assessed on C6 glioma intracranial implant rats model. Results The average diameter of Tf-NP-Dox is around 200 nm with surface Tf molecule number per Tf-NP-Dox approximately 25. MTT assay demonstrated stronger cytotoxicity of Tf-NP-Dox to C6 glioma cells (P<0.01). HPLC assay showed Tf-NP-Dox transport Dox into C6 with higher efficiency compare to NP-Dox or Dox (P<0.01). On C6 glioma bearing rat, Tf-NP-Dox could transport more Dox into tumors tested by HPLC assay (P<0.05), and extended life span markedly compared to NP-Dox or Dox (P<0.05). Conclusions Tf-NP-Dox had a potential of glioma targeting and had a better therapeutic effect to glioma both in vitro and in vivo.
The Primary Investigation on Biological Effect of Mesoporous Bioactive Glass In Vivo
Authors: Sui Bai Yan , Wu Cheng Tie , Sun Jiao
Published: August 2013

Mesoporous bioactive glass (MBG) has superior bioactivity and degradation than non-mesoporous bioactive glass (BG) in vitro. But the biological effect of MBG in vivo is still unknown. In this study, MBG powders with 20μm were implanted into the femoral condyles in SD rats. BG powders with 20μm were used as a control. The local degradation and osteogenesis were observed at 1 week and 4 weeks after implantation, and the systemic toxicity of the degradation products were also evaluated simultaneously. The results revealed MBG powders had the faster rate of degradation and better osteogenesis effect than BG powders at 4 weeks, although the most of material still remained in situ. Histopathological analyses indicated the degradation products did not have any damage to major organs such as liver and kidney. In conclusion, this preliminary study demonstrated that MBG powders have more excellent biological effect at 4 weeks than that of BG in vivo. However the long-term effect needs to be confirmed.
Study on Corrosion Property of Fluoride Treated Biodegradable AZ31 Magnesium Alloy
Authors: Zhang Chun Yan , Ma Yan Long , Liu Cheng Long
Published: August 2013

In order to improve the corrosion resistance of Mg alloys as degradable implant material, fluorine conversion coatings were synthesized on AZ31 magnesium alloy by immersion in hydrofluoric acid (HF) for different time. Potentiodynamic electrochemical technique and hydrogen evolution testing were employed to investigate the corrosion behavior of the coated alloys in Hanks solution. It is indicated that the fluoride conversion coating, which is compact and composed of MgF2, can significantly decrease the degradation rate of Mg alloy AZ31 in Hanks solution. The most improved corrosion protection was achieved by immersion for 10 days. The corrosion current density was 40 times lower than that of the substrate and the hydrogen evolution rate of the coated sample was only one-fiftieth of the substrate.
Research Progress of Molecular Imprinting Technology
Authors: Xiao Shu Juan , Yu Shou Wu , Gao Shui Jing , Guo Hong Xia
Published: August 2013

Molecular imprinting technology（MIT）is a kind of new-emerging polymerizing technology with specific selectivity and affinity ability, An elucidation on the basic principles, and the broad applications of molecularly imprinted polymers (MIPs) in some fields are given in this paper. It also gives an overview of some recent development in the field and offers an insight into how the area is likely to evolve in the future.
TiO2 Nanotube Film as the Support of Platinum Electro-Catalyst with Enhanced Electrochemical Activity for Methanol Oxidation
Authors: Luo Yong Ping , Xu Shun Jian , Zhong Wei , Xiao Zonghu
Published: August 2013

A facile method to prepare well-dispersed Platinum nanoparticles (Pt NPs) on FTO and TiO2 nanotube (TNTs) film was reported. The so-prepared Pt/FTO and Pt/TNT film electrodes are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD). The results show Pt NPs have been dispersed on the supporting matrixs uniformly. Electrochemical investigations indicate that Pt/TNT has higher electrocatalytic activity and better tolerance to poisoning species in methanol oxidation than Pt/FTO, which can be ascribed to the high dispersion of Pt NPs on the TiO2 nanotubes surface. The present method is promising for the design of high performance catalysts for direct methanol fuel cells.
Numerical Simulation on the Preparation of Vinyl Acetate Catalyst in Fluidized Bed
Authors: Zhang Pan , Cui Kun , Xu Ning , Wang Guang Jian
Published: August 2013

Based on the preparation of zinc acetate/activated carbon catalyst in the fluidized bed reactor, the Eulerian multiphase model in Fluent was used to numerically simulate the gas-liquid-solid flow and the gas-solid-solid flow hydrodynamic characteristics in fluidized beds. The instantaneous phase volume fraction and the flow hydrodynamic characteristics of the three phases were analyzed, and in view of the zinc acetate/activated carbon catalyst with bad uniformity prepared by present method, a new mode of operation with dynamic rules was proposed. The simulation results show that activated carbon particles with different density can realize layer inversion using this mode of operation, and the uniformity of zinc acetate/activated carbon catalyst will be effectively improved.
Analysis of Nitrogen Oxides Formation in CH4/Air Laminar Premixed Flame
Authors: Zhang Jun Xia , Yang Bing Biao
Published: August 2013

Many combustion processes seriously pollute the environment because of producing nitrogen oxides emission, which abstracts wide attention from researchers. How to reduce nitrogen oxides emission is important to protect the environment. At the present work, a reduction mechanism based on a detailed chemical reaction kinetics mechanism, Gri_Mech3.0 was adopted to analyze nitrogen oxides formation in a CH4/air laminar premixed and turbulent diffusion flames, a two dimensional turbulent diffusion flame was simulated with the EDC model. Parameters were obtained, including flame temperature, burning velocity and mass fraction of nitrogen oxides. The results of laminar premixed flame show that nitrogen oxides emission mainly comes from the thermal and prompt NO mechanisms. A large amount of free radicals O, H and OH produced by combustion processes provide reactants for the reactions of nitrogen oxides formation. Mole fraction of nitrogen oxides increases with the increasing of both flame temperature and chemical equivalence ratios. By contrast, there is a lower mass fraction of nitrogen oxides formation for the fuel-lean flame.
Synthesis and Characterization of 4-Phenylethynylphthalic Anhydride
Authors: Meng Xing Li , Zhao Zhan Yu , Chen Xiao Bin
Published: August 2013

4-phenylethynylphthalic anhydride (4-PEPA) was synthesized by the palladium/copper catalyzed Sonogashira coupling reaction between phenylacetylene and 4-bromophthalic anhydride. The yield achieved 85.48%. The single crystal of 4-PEPA was grown and crystallized by solvent diffusion method. The structure of the compound was characterized by single crystal X-ray diffract-tion method, UV-vis, 1H NMR, 13C NMR and FTIR. All characterizations above demonstrated the structure of 4-PEPA. HPLC gave the purity achieving 96.62%. TGDSC was used to investigate the thermal stability of the compound. Vibrational frequencies of 4-PEPA calculated using the density functional theory (DFT/B3LYP) method with the 6-31G(d) basis sets were in good agreement with experimental values.
Electrochemical Performances of Li4Ti5-xAlxO12 (x=0.03, 0.05, 0.10) as Anode Materials for Lithium Ion Battery
Authors: Gu Fang
Published: August 2013

Li4Ti5-xAlxO12 (x=0.03, 0.05, 0.10) were prepared by a solution method. The electrochemical performances including charge-discharge and AC impedance were investigated. The structure of the samples were characterized by X-ray diffraction. The results revealed that proper Al doped into Li4Ti5O12 would not change or destroy the crystal structure. Li4Ti5-xAlxO12(x=0.03, 0.05) had better capacity than Li4Ti5O12, because of the decrease of electric resistance. But when the quality percent of Al was too big, it will bring negative influence to Li4Ti5O12. Al3+ doping did not change the electrochemical process, instead enhanced the electronic conductivity and ionic conductivity. The reversible capacity and cycling performance were effectively improved.
Influence of Carbonization Conditions on Mg Ion Concentration in Mg (HCO3)2 Solution
Authors: Wang Yu Lian , Yin Wan Zhong , Zhong Wen Xing
Published: August 2013

In this paper, Mg (HCO3)2 solution, was obtained by the carbonate reaction of Mg (OH)2 solution , using magnesite as raw materials. Mg ion concentration was measured by ICP-AES method. The effect of carbonization temperature, carbonization time, flux of CO2 and agitation speed on the concentration of Mg ion in Mg (HCO3)2 solution was investigated. Results showed that Mg ion concentration reduced with increasing temperature, but increased a little as time went on and flux of CO2 improved. With increasing the agitation speed, Mg ion concentration increased firstly, then decreased, finally remained unchanged. XRD analysis shows that the purity of obtained Mg (HCO3)2 solution is very high.
Methanol Dehydrogenation to Formaldehyde over Zinc Oxide-Modified Sodium Carbonate
Authors: Wang Qing Song , Li Gong , Huang Min Jian , Zhou Shu Xi
Published: August 2013

Methanol dehydrogenation to formaldehyde was conducted in a fixed-bed flow reactor under the atmospheric pressure with sodium carbonate modified by metal oxides. The effects of catalyst composition, reaction temperature, weight hourly space velocity (WHSV) on the reaction were investigated. The catalysts were characterized by XRD, TG and nitrogen adsorption. The results indicated that ZnO/Na2CO3 containing 2wt% ZnO prepared by mechanical grinding method had higher catalytic activity for methanol dehydrogenation to formaldehyde. The conversion of methanol and the selectivity of formaldehyde were respectively 57.62% and 77.84% under the condition of wmethanol/wfeed =0.19, reaction temperature 650°C and WHSV (methanol) 7h-1.
Study on the Photocatalytic Properties with Different Ratio Films of ZnO:Fe2O3
Authors: Hou Gui Qin , Gao Shui Jing , Zhang Wen Li
Published: August 2013

The nanocomposite films with different ZnO:Fe2O3 ratio was prepared by Sol-Gel method on slides glass, Its structure performance was characterized by XRD, SEM, and the photocatalytic performance of different ZnO: Fe2O3 ratio films was investigated. The results showed that: the three layers film that with Zn: Fe ratio was 1:2, had the best photocatalytic effect.
Synthesis, Crystal Structure and Photoluminescent Properties of a New Uranium-Containing Silicotungstate
Authors: Tan Rong Xin , Cui Shu Xin , Wang Hui , Jiang Ya Ping , Song Wen Zhi
Published: August 2013

A new uranium-containing silicotungstate A-β-Na14[Na2(UO2)2(SiW9O34)2]·43H2O (1) was synthesized in an aqueous solution. The compound was characterized by elemental analysis and infrared spectra analysis. A single-crystal X-ray analysis was carried out on crystal (1) which crystallizes in triclinic system, space group p ī, with a = 13.386 Å, b = 13.506 Å, c = 16.183 Å, α = 85.337o, β = 73.608o γ = 64.833o and Z = 1. Polyanion (1) consists of two A-β-SiW9 units which sandwich two uranium and two sodium ions, leading to a Keggin-type sandwich structure. The photoluminescent spectrum of (1) shows typical emission features of uranyl compounds.
Study on Gasoline Combustion Dust with ASE and HPLC
Authors: Liu Shu Jun , Feng Kun , Xu Hao Nan , Wang Ying
Published: August 2013

The gasoline combustion dusts was analyzed by accelerated solvent extraction-high performance liquid chromatography(ASE-HPLC) in this paper. The optimum extraction conditions were that extraction time was 30min, temperature was 120°C and the pressure was 100Mpa. It is a efficient extraction method for a laboratory to quickly extract gasoline combustion dust samples.
Mechanical Properties and Fracture Characterization of Al-5%wtMg Composite Reinforced with Carbon Nanotube
Authors: Chen Ya Guang , Cai Xiao Lan , Sun Hong Peng , Le Gang , Hu Cui
Published: August 2013

High-Energy Ball Milling was used to disperse carbon nanotubes (CNTs) in Al-5wt%Mg matrix and hot-pressing were used to consolidate the composite powders with different CNTs contents. The results showed that a certain weight of CNTs can be homogeneously dispersed in the matrix through the high-energy ball milling, the most of CNTs are embedded in the Al-5wt%Mg matrix and have a close bonding with the Al-5wt%Mg matrix. In addition, CNTs can play the role of grinding aids to prevented agglomeration of particles. Tensile strength and hardness of the CNTs/Al-5wt%Mg composites increase by 47.9% and 37.25% respectively when the CNTs was 2wt% in the Al-5wt%Mg composites. The fracture surfaces of the composite with 2wt% CNTs involved in the pulling out and breakage of CNTs. In this case, both Orowan looping and load transfer were proved to be the strengthening mechanisms of the CNTs/ Al-5wt%Mg composites.
Surface Modification of Parylene C Film and Application
Authors: Zhang Li Sheng , Zhou Yuan Lin , Guo Yang , Yang Ye
Published: August 2013

In this article, we report the surface modification results of Parylene C Film by solution of sodium naphthalene complex and its application. In this work, the function group and the crystal structure of the film were characterized separately with Attenuated Total Reflection Fourier transformation infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD).The result of test shows that the bond of carbon (C) and chlorine (Cl) is damaged; The crystalline of the film reduces, and the NaCl crystal exist on the film surface. The surface energy of the film is increased from 28.64mJ/m2 to 41.48mJ/m2, and the shearing tension of modified film was reached over 212.8kPa.The generalized analysis result indicated that nucleophilic reagent destructs the C-Cl bond on the benzene ring, the chlorine (Cl) atom on the benzene ring and the sodium ion in modified reagent forms the sodium chloride which adheres to the film surface.
Influence of Substrate Temperature on Properties of Transition Materials from Amorphous to Microcrystalline Silicon Prepared by VHF-PECVD
Authors: Wang Wen Ming , Yang Hui Dong , Zhang Ji Sen , Li Shan , Luo Xin Rong , Feng Shi Li
Published: August 2013

Thin films of amorphous/microcrystalline silicon transition zone prepared at different substrate temperature by very high frequency plasma enhanced chemical vapor deposition (VHF-PECVD) have been studied in this paper. The influence of substrate temperature on microstructure,photoelectric properties and growth of these materials have been investigated. The results show that in a certain extent with the increase of substrate temperature,the structure of material evaluated from amorphous to microcrystalline,the deposition rate and dark conductivity ,the photosensitivity had been improved.However,the optical conductivity had been reduced. The optimized substrate temperature for thin films deposition under our current growth system is about 240°C,at which deposition rate can reach 0.6nm/s.
Preparation and Mechanical Properties Study of Blown Film from Star Copolymer of Poly(Epsilon-Caprolactone-co-L-Lactide)
Authors: Liu Shi Qi , Jiang Lin , Zhang Ying Jie , Yuan Ming Long
Published: August 2013

Star copolymers of ε-caprolactone and L-lactide (ε-CL/L-LA) were synthesized with different compositions in the presence of pentaerythritol and using stannous octoate as catalyst. The copolymers were characterized by 1H NMR spectra analysis and then blown into films in a single-screw extruder. The mechanical properties study show that the copolymers differed widely in their elongation at break and tensile strength according to the ratio of monomers and pentaerythritol in the copolymerization. The tensile strength of the films deriving from extrusion is much higher than that obtained through solvent volatilization.
Preparation of Polypropylene and Polysulfone Composite Ultrafiltration Membrane though Physical Coating Method
Authors: Shao Fei Fei , Zhang Yu Feng , Ni Lei
Published: August 2013

Polypropylene/polysulfone composite ultrafiltration membrane was prepared though coating method using microporous polypropylene hollow fiber membrane as a support layer and polysulfone membrane as a functional layer. Membranes of different pore sizes were prepared by L-S phase translation though changing the concentration of PS. The properties of the composite membrane include water flux and rejections of PEG-2000 were studies. The flux of 78 L/m2h and 98 % rejection was achieved at PS concentration of 11%, Polyvinylpyrrolidone of 4 %, liquid phase coagulation time of 3 hours.
Study on Preparation of Nano-Sized Iron Oxide Thin Films and its Modification
Authors: Zhu Yan , Wang Jing
Published: August 2013

Nano iron oxide thin films were prepared by both citric acid sol-gel and dip-coating method. The modifications of nano ferric oxide thin film materials were carried out by using PEG and bismuth nitrate . Both nano ferric oxide thin film materials prepared and the modified were characterized by SEM, XRD. It is indicated that that modification of wether PEG or bismuth nitrate to the thin film can reduce the convex surface and the thin film surfaces are more uniform.
The Occurrence and Control of the Surface Defects of Color-Coated Sheets
Authors: Yan Ya Kun , Li Xiao Hong , Ge Ying , Zhao Wen Cheng
Published: August 2013

This paper briefly introduced the coating process that generally used in the domestic and overseas Color-coated lines, emphatically analyzed the surface defects of the Color-coated sheets that easily occurred during the production and the methods which can prevent those defects.
Applications of Spraying Technology in the Converter Hood
Authors: Lu Yan Hong , Liu Xiao Ming
Published: August 2013

According to analysis of operation condition and failure mechanism of converter hood, we designed a protective coating material and sprayed on the converter hood of Tianjin Iron & Steel Group Co. Ltd. by supersonic arc spraying technology, extended the working life of the converter and increased the output and benefit.
Hyper-Dispersant Modifier Prepared and Applied in Polyethylene Composites
Authors: Wang Shao Hui
Published: August 2013

A new hyper-dispersant with Silicon radicals as anchoring group and poly (butyl acrylate) as solvatable chain was synthesized and its effect on the properties of PE/Talc composites was investigated in this paper. Fourier transmission infrared spectroscopy (FT-IR) results show that the modifier react on the Talc powders surface and the modified Talc powders particles. The impact strength of PE/Talc composites increased about 32.5% compared with that of PE/Talc (filled with same non-modified fraction) respectively. Based on surface analysis by scanning electron microscope (SEM), the Talc powders particles buried well in PE matrix when Talc powders was coated with the new modifier.
Estimation of the Elastic Modulus and Moisture Absorption of Sisal Fibre
Authors: Shen Yi Ou , Li Yan , Lv Feng
Published: August 2013

Microstructures of sisal fibres were revealed optically. Statistics on dimensional parameters for sisal fibres were used to establish a geometrical model in order to estimate the elastic modulus and moisture absorption capability of sisal fibres. The single fibre tensile test was conducted on the sisal. The predicted longitudinal modulus and water absorption was in good agreement with experimental results. It was found that the lumen ratio is a significant factor in determine the mechanical properties of the natural fibre.
Effect of Calendering Conditions on the Properties of Paper
Authors: Liu Peng Tao , Liu Xue Si , Liu Jin Gang
Published: August 2013

The effect of calendering temperature, speed and linear load on the properties of opacity, brightness, smoothness, paper thickness, gloss and ink absorption of art paper were studied by orthogonal experiment. The art paper coating formulations were as follows: GCC-60 100 pph, solid content 64.6% for precoating; GCC-95 40 pph, Kaolin 60 pph, and solid content 61.3% for top coating. Bar coater was involved to coat by hand in the lab and the coating weight was controlled at 20±2g/m2. After calendering in different conditions, the optical properties and printability of paper were analyzed. Regression analysis was used to study which of the calendering conditions was the dominant factor influencing the paper properties. The results showed that linear load was the dominant one, followed by the calendering temperature and calendering speed. After calendering, smoothness and gloss increased, while the brightness and opacity decreased.
The Effect of Different CeO2 Addition on Performance of Ni-WC Composite Coating by Vacuum Fusion Sintering
Authors: Miao Lu , Wang Ya Nan , Li Yan Hui
Published: August 2013

By vacuum fusion sintering technique made different CeO2 addition Ni-WC composite coatings on 45 steel. Hardness, wear resistance property and corrosion resistance property of the Rare-earth Ni-WC composite coatings were measured and analyzed by Rockwell hardness tester,micro-hardness tester, friction wear testing machine and Salt spray corrosion box. The results showed that:The CeO2 content comes up to 0.75% of the coatings` hardness, wear resistance and corrosion resistance property better than those of other coatings.
Preparation and Characterization of UV-Curable Talc/Acrylate Composite Coatings with Enhanced Flame-Retardancy
Authors: Sun Xiao Ying , Kang Jing Ling , Hang Jian Zhong , Jin Lu Jiang , Xu Fan , Shi Li Yi
Published: August 2013

Talc, with different particle sizes, was incorporated to improve flame resistance properties of UV-curable talc/acrylate composite flam-retardant coating at different contents via mechanical blending. Hardness, transmittance, haze, cross-cut adhesion and abrasion resistance results showed that the mechanical and thermal properties of the coatings improved effectively with no comprising on optical properties by adding Talc. The flame retardancy of the UV-curable coatings was investigated by thermogravimetric analysis (TGA) and Microscale Combustion Calorimeter (MCC). The results showed that the incorporation of Talc into the organic network led to an improvement in the thermal stability and flame retardancy of the coating materials. When talc content increased from 0 to 30 wt%, the peak heat release rate (PHRR) decreased from 191.1 W/g to 130.6 W/g, and the total heat release(THR) droped from 17.0 kJ/g to 11.1 kJ/g.
Electroless Nickel Plating on ME20M Magnesium Alloys with an Environmentally-Friendly Pretreatment
Authors: Guo Cui Tian , Xin Shi Gang , Huang Qing
Published: August 2013

Coating of ME20M magnesium alloys was first carried out using electroless nickel plating technique with an environmentally-friendly pretreatment. The morphology and specific weight loss of the pickling process were investigated. The Ni-P coating was characterized by its structure, morphology, chemical composition, adhesion strength and corrosion resistance. The SEM image shows that the pyrophosphate pickling process can produce a rough surface and the thermal shock test indicates excellent adhesion strength between magnesium alloys and Ni-P coating. The damp heat test and electrochemical measurement prove the Ni-P coating significantly increase the corrosion resistance of ME20M magnesium alloys.
Computational Simulation and Prototype Testing of Nanocoating on Products in Aerospace Industry
Authors: Li Jeremy Zheng
Published: August 2013

The material damages in aerospace industry caused by correction can be detected in many different products including welded and bolted areas in aircraft and jet engines. The corrosion occurs when different conducted materials contact to each other in electrolyte media and different conducted materials present potential difference that causes rusting. The rusting problems in products lead both safety issues and billions of dollar loss in different businesses including aerospace industry. This paper studies the rusting mechanism and anti-corrosive coatings by applying computational simulation and prototype experiment. Both computer-aided analysis and sample testing demonstrated similar results which confirm the feasibility of analytic methodology introduced in this research paper.
Effect of MgO Coating on Whisker Preform Strength of Aluminum Matrix Composite Fabricated by Squeeze Casting
Authors: Zhang Lei , Zhang Rui Wu , Wang Li Dong , Qiao Ying Jie , Xu Shi Chong , Fei Wei Dong
Published: August 2013

In this paper, MgO with different contents was coated on the surface of magnesium borate whisker using chemical precipitation method. The resistance to compression of whisker perform was measured, and the effect of MgO coating on the deformation resistance of magnesium borate whisker perform was studied. The result shows that the compression strength of whisker perform sintered at 900°C was enhanced with increasing MgO coating ratio to magnesium borate whisker. The compression strength was increased from 0.80MPa for coating ratio of 0 to 1.34Mpa for coating ratio of 1:10. Then magnesium borate whisker-reinforced pure aluminum (MBOw/Al) composite without apparent microscopic defects was fabricated using modified whisker perform. The tensile strength and elastic modulus at room temperature attain 240MPa and 130GPa, respectively.
Research on Performance of the Cu-Based Friction Materials Repaired by Spark Plasma Sintering
Authors: Du Jian Hua , Liu Yan Wei , Jia Cheng Chang
Published: August 2013

The worn Cu-based friction disks were repaired and remanufactured by the spark plasma sintering (SPS) technology. The morphology and component of the repaired friction disk were analysed by SEM and EDS. The mechanical properties were characterized by microhardnessmeter and friction tester. The results indicated that the microstructure of the repaired areas combined closely with the worn areas and the components were well-distributed. The friction coefficient of the repaired materials is close to the unrepaired, but the hardness declined slightly.
Analysis of Fracture Behavior of Metal/Ceramic Functionally Graded Materials under Thermal Stress
Authors: Fan Cheng
Published: August 2013

In this presented work, a coupled thermo-mechanical model is employed to analyze the thermo-mechanical behavior of ceramic functionally graded materials (FGMs) and the crack formation and propagation process of ceramic coating was simulated step in step and step by step using the RFPA (Realistic Failure Process Analysis) 2D-Thermo code. The thermal shock fracture behavior is discussed based on the basis of the simulated crack morphology and elucidated the mechanism of crack deformation and crack propagation. The state change from compression to tension whose magnitude is large enough to exceed the tension strength of ceramic causes the vertical crack. The numerical results agreed well with the experimental results in the previous literature.
Preparation and In Vitro Degradation of PLLA Super Fiber Membrane
Authors: Yu Jian Xiang
Published: August 2013

In this paper, non-woven micron-nanofiber mats of PLLA were successfully prepared via electrospinning technique, and the mats were characterized by SEM, their degradation performance was studied too. The results indicated that PLLA fibers have Bead-string morphology and the surface morphology changed to porous after degradation.
Cyclic Voltammetric Studies of the Behavior of Pb-0.3%Ag-0.06%Ca Rolled Alloy Anode during and after Zinc Electrowinning
Authors: Yang Hai Tao , Liu Huan Rong , Zhang Yong Chun , Chen Bu Ming , Guo Zhong Cheng , Xu Rui Dong
Published: August 2013

In this paper, electrochemical behaviour of Pb0.3%Ag0.06%Ca rolled alloy anode during the 6 days galvanostatic electrolysis in acid zinc sulphate electrolyte solution was investigated with Cyclic Voltammetry (CV) techniques. The phase composition of the anodic oxide layers during the electrolysis was observed using X-Ray Diffraction (XRD). The results revealed that with the increasing electrolysis time, the anodic peak (PbPbSO4) is mainly present a rise trend in the first day electrolysis, thereafter, almostly keep a constant value. And the anodic peak (PbPbSO4) gradually moved in the positive direction while the anodic peak (PbSO4β-PbO2, PbOα-PbO2) strongly moved in the negative direction. The cathodic peak (β-PbO2 and α-PbO2PbSO4) and (PbO and PbSO4Pb) mainly present a rise trend and gradually moved in the negative direction. Besides, the corrosion phase of the anodic oxide layers mainly consist of PbSO4, Pb, α-PbO2 and PbS2O3. After electrolysis for 3 days, the major phase of the anodic oxide layers is PbSO4 with a few Pb phase. When the electrolysis reaches the 6th day, the major phase of the anodic oxide layers is also PbSO4 with a few α-PbO2 phase. The preferred growth orientation of PbSO4 is (021) ,(121) and (212) planes.
A Study on Suizhong 36-1 Oil Field Acid Sludge Formation Influence Factors
Authors: Wang Ji Gang , Zhan Ning Ning , Zhao Wen Xiu , Chang Zhi Jian , Fan Zhen Zhong , Wang Xin
Published: August 2013

Acid sludge is one of the major oil field acidification increased production ineffective. Therefore, the acid sludge formation of influencing factors on improving acidification effect is of great importance. The Suizhong 36-1 oilfield is selected as the research object , a more in-depth study of the acid sludge formed in the acidification process influencing factors . The results show that: With the increase of crude oil in the colloid and asphaltene content , the amount of oleic acid mixture to form acid sludge also increases . Strong acid ionizing out of the higher concentration of H+ , the faster of the speed, the forming acid slag trend is obvious. The residual acid pH value increased , the amount of acid sludge also will continue to rise.
Calculation and Analysis of Multifractal Spectrum of Sinter Surface
Authors: Cui Zhi Min , Sang Rong Li , Li Yuan Liang , Zhang Qing Jun
Published: August 2013

Multifractal spectrums of sinter with different alkalinity were analyzed by multifractal software. The results show that sinter pore structure change from uniform to non-uniform with the improvement of alkalinity, Δα increases from 0.53 to 0.55. The structure of sinter pore is mainly microscopic by competition between macropores and micropores, Δf changes from 0.14 to-0.44. The distribution of sinter pores is quantitatively characterized by multi-fractal spectrum, which is consistent with transmission electron microscopy image.
Study on the Properties of the SPPs Self-Interference
Authors: Ma Wen Juan , Zou Wen Dong , Wang Wei Hong
Published: August 2013

In this paper, surface plasmon polaritions (SPPs) induced by a tightly focused and radially polarized vortex beam on a planar metal/dielectric interface is simulated and the properties of the SPPs self-interference are studied. It is shown that utilizing vortex beam can avoid the influence of the central zero-order angular spectrum. Besides, the impacts of various factors as different topological charge, substrates parameters and metallic film material on the generation of SPPs interference pattern are compared and analyzed.
Variation of Surface Tension of Water in High Magnetic Field
Authors: Chen Long , Li Chuan Jun , Ren Zhong Ming
Published: August 2013

The surface tension of water in high magnetic fields up to 10T was investigated with aid of the high-magnetic-field tensiometer (HMFT). It was found that the surface tension of water linearly varied with the magnetic field intensity and increased by 0.48mN/m or 0.65% in 10T. The increase of the surface tension of water could be attributed to the increase in the number and stabilization of the hydrogen bonds in the magnetic field.
The Statement of Material Mix-Match in Jewelry Design
Authors: Xue Hong Yan , Jiang You Ya
Published: August 2013

With the steps of the society moving forward, with the improvement of technology, with the residents material life becoming richer and richer, people start to pay more attention to enrich their spiritual life, rather than treat the jewelry simply as the symbol of wealth, moreover they are going to make it a way to show their personalities. Material mix-match, as one of the most important way of design, is also usually used in the field of jewelry design. Sequentially brings the new light spot for jewelry design on both visual and implicational hierarchies, and promotes the quality of jewelry. Thus human beings start to use material mix-match to define themselves. After many years of study of design, the authors gradually summarized the regular patterns/features/procedures of material mix-match for jewelry design.
Production of Sugar Beet and Maize as Energy Crops in Saline Alkali Soil
Authors: Geng Gui , Song Fu Qiang , Yang Feng Shan , Yu Li Hua , Wang Tie Jun , Pi Zhi , Peng Chun Xue , Yang Yun , Sun Fei , Sun Zhi Wei , Zhao Hui Jie
Published: August 2013

The production of sugar beet and maize as energy crops were investigated in saline alkali soil in China during three growing seasons. A dramatically decreases of yield of grains and starch of maize was found in both medium and heavy saline-alkali soil in the three years. But there were no decreases of yield of root and sucrose of sugar beet in medium saline-alkali soil and reduction of yield of root and sucrose of sugar beet in heavy medium saline-alkali were faintly. The results indicate that sugar beet is more tolerant to salt stress and maintains higher production of sugar may be a major bioethanol crops in saline-alkali soil in China.
Adhesion Properties of Pigment Dyes Using Ultrasonic Energy
Authors: Rao Xiao Juan , Hu Qiong Yu , Li Li Jun , Xiong Fei , Cao Gen Yang
Published: August 2013

Pigment dyes are vastly used in dyeing and printing of all kinds of fibers. Ultrasonic energy and cationic modifying were applied in pigment dyeing. The results shown that both of cationic modify and ultrasonic energy can make for better dyeing effect. And the ultrasonic energys condition is 30 °C in 5 min.
Influence of Fabric Textures on Pilling Performance of Wool Sweaters
Authors: Zhang Wei
Published: August 2013

The weft knitted fabrics including plain, rib, rib and Milano with 31.25tex and 17.86tex wool yarns were taken as research objectives with a view to investigate the influence of fabric textures on pilling performance of wool sweaters. According to the GB/T4802.3-1997, the pilling performances of various samples were tested and studied. The results show that the fabric textures have great influences on pilling performance of wool sweaters. The anti-pilling performance is rib > rib > Milano >plain. The bigger the sinking depth is, the more serious the pilling phenomenon is. With larger liner density yarns, the anti-pilling performance of 1x1 ribs are better; With medium and less liner density yarns, the anti-pilling performance of 2 x 2 ribs are better.
Effect of Technology Factors on the Resin Impregnation Results of Poplar
Authors: Han Jian , Liu Kai Neng , Gao Xi Tao
Published: August 2013

Aimed to improve the properties of Poplar, this study, taking phenol-formaldehyde resin (PF) and urea-formaldehyde resin (UF) as impregnation resin, probed the effect of the technology factors-vacuum time, solid content of resin, impregnation temperature and time on the impregnation results of Poplar, and the relationship between the resin and the wood was researched through infrared spectrum. The weight percent gain (WPG) of test-pieces increased with vacuum time extending, and WPG of the test-pieces were greatest when the solid content of resin was 30%, and the impregnation temperature was 25-30°C. when the impregnation time extended from 3 h to 9 h, WPG of the test-pieces presented increase trend which wasnt obvious. In this wood impregnated resin, the reaction between the resin and the hydroxy in wood formed ether bond binding, which proved that the resin and the wood occurred the chemical reaction.
Study on PS-Molybdophosphoric Composite Fibers  via Electrospinning Process
Authors: Zhang Zhi Ming , Li Ting Ting , Cao Jie , Li He Ti
Published: August 2013

Fine polystyrene fibers have been generated from electrospinning of PS/molybdophosphoric acid in THF and DMF solution. The fiber diameters ranged from 500 nm and increased by adjusting the volume of DMF, the amount of the PS/ molybdophosphoric acid and spinning voltage, the size of the distance. Surface morphology of the nanofibers was characterized by scanning electron microscopy (SEM). The fibers generated from the solutions were more homogeneous in sizes, especially when more THF was added. With the phosphomolybdate amount of increase in untreated, cold pressing, hot pressing modulus showed a trend to decrease. The infrared results show that the composite membrane contains four phosphomolybdate absorption peaks, which is consistent with the predicted results.
Progress on Fabrication of Free-Standing and through-Hole TiO2 Nanotube Arrays
Authors: Xu Kun , Liu Jian Xiong , Wu Zheng Yu , Wei Jiang , Yu Ting Ting
Published: August 2013

TiO2 nanotube arrays have attracted remarkable attention in recent years for diverse applications including water splitting photocatalysis, gas sensors, lithium-ion batteries and dye-sensitized solar cells, etc due to its semiconductor properties ,large surface area and nanotublar structures. Compared with TiO2 nanotube, free-standing and through-hole TiO2 nanotube membranes with optimized microstructure, direct electrons transfer,stability to mechanical vibrations,have a broader applied potential. This report presents several preparation methods of free-standing and through-hole nanotube membranes, and explains the mechanism of detachment process. These methods can be classified into two types: one is an in-situ method and the other is an ex-situ.