bluuebunny/crossref_metadata_2025 huggingface dataset:
Theoretical Investigation on Microstructure of the Novel 24R-Type LPSO Phase in Mg97Zn1Y2 Alloy
Authors: Tang Ping Ying , Zeng Meng Xue , Li Dong Lin , Tang Bi Yu , Peng Li Ming , Ding Wen Jiang
Published: May 2011

The first-principles calculation based on density functional theory has been carried out to study the microstructural feature of the novel 24R-type long period stacking ordered structure in Mg97Zn1Y2alloy. The lattice positions of the Y and Zn atoms are determined theoretically, it is shown that the additive atoms are firstly enriched in the stacking fault layers at the two ends, a small amount are distributed in the interior stacking fault layers of the structure. And the arrangement of these Y and Zn atoms trends to be along the diagonal line of the unit cell. The structural stability is analyzed and the electronic density of state is discussed as well as.
Homogeneous Grafting of Bagasse Cellulose in Ionic Liquid
Authors: Wei Xiao Yi , Wang Qing Huang , Li Ji Hua , Chen Jia Cui , Huang Mao Fang , Tang Yong Fu , Fu Tiao Kun , Su Jun Bo
Published: May 2011

A new cellulose graft copolymer was synthesized by the homogeneous graft polymerization in ionic liquid. The methyl methacrylate was successfully grafted onto the bagasse cellulose in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) as a homogenous media. The obtained copolymer was characterized by Fourier transform infrared spectroscopy (FT-IR) and Scanning electron microscope (SEM). The results of thermal analysis curves exhibited two separated pyrolysis with cellulose and the grafted pMMA. Moreover, the homogenous reaction media applied can be carried out in completely recycled ionic liquid, and the modified cellulose has a potential value for oil absorbent.
Preparation and Characterization of Pol(vinyl Alcohol）/ Cellulose Nanocomposites
Authors: Bai Lu , Gao Yuan , Li Shuai , Zhang Li Ping
Published: May 2011

In this study, nanocomposite membranes were prepared from poly (vinyl alcohol) (PVA) with different amounts of cellulose nanocrystals as filler and characterized by thermogravimetry (TG). Swelling sorption behavior of various feed alcohol mixtures was investigated at 80°C, and found that NCC in PVA matrix could help to reduce the overall membrane swelling. Mechanical properties of the nanocomposite membranes were examined in relation to NCC content in the composite. Optimal NCC content in the composite was found to be 3 wt% in terms of its overall properties as compared to neat PVA film. With the addition of 3 wt% NCC to PVOH the ultimate tensile strength showed improvement compared to pure PVA. The PVA/ NCC nanocomposite membrane had shown increases in elongation at low filler loadings. The TG analysis demonstrated that the nanocomposite membranes exhibited higher thermal resistance.
The Effect of Embedded Optical Fibers on the Static Mechanics of Composite Materials
Authors: Tian Heng , Ji Yun Dong , Wang Ji Hui , Yin Yan Zi , Sun Jiu Xiong
Published: May 2011

This paper mainly investigates the effect of embedded optical fibers on the tensile and bending propertities of cross-ply glass fiber reinforced plastics. Different optical fibers and different embedded layers are both considered. The results show nearly all the specimens are varying within a small region. But 3 OF at 0°embedded in bending specimens exhibit about 18.3% reduction, and the effect of 3 OF in the under layer is more than that of 3 OF in the upper layer.
Study on the Salt Spray Corrosion and Erosion Behavior of TC4 Titanium Alloy
Authors: Shao Shu Ai , Xi Hui Zhi , Chang Yun Peng
Published: May 2011

The erosion and salt spray corrosion–erosion cyclic properties of TC4 titanium are systematically studied in this paper. 1Cr11Ni2W2MoV martensitic stainless steel was selected as the comparison material. Experimental results show that the erosion resistance and salt-spray corrosion resistance have no direct relation to the hardness of two kinds of material. TC4 with low hardness and good toughness exhibits much better erosion resistance than 1Cr11Ni2W2MoV with high hardness and poor toughness under the same test conditions. The erosion rate at 90°impinged angle is lower than that at 30°impinged angle. The combination of erosion and salt spray corrosion reduced the erosion rate of TC4, producing negative interactions.
The First Synthesis of N,N,N’,N’-Tetramethyl-1, 3-Disaminomethyl- Adamantane Dihydrochloride
Authors: Zhu Hua , Guo Jian Wei , Yang Chu Fen , Liu Sa , Peng Jin Ping , Cui Yi Hua
Published: May 2011

A new tertiary amine derivative of adamantane —N,N,N’,N’-tetramethyl-1, 3-disaminomethyl adamantane dihydrochloride (1), which is a key intermediate for preparing Gemini surfactants and bola surfactants, has been synthesized in this paper. The target compound (1) can be synthesized in high yield by using 1-adamantanecarboxylic acid as raw material. The structure of these compounds has been identified.
Effect of Kaolin Clay Content on the Cell Morphology and Physical Properties of Injection Molded PS Foams
Authors: Jiang Ming , Chi Heng
Published: May 2011

The effect of kaolin content on the cell structure of PS foam and the correlation between the cell structure and the physical properties were evaluated in this work. The kaolin as a nucleating agent did facilitate the cell nucleation. The cell structures were apparently enhanced with increasing kaolin content. In addition to facilitating nucleation, the kaolin confined the motion of chain segments of the matrix polymer, which contributed to the change in cell structure by confining cell growth and cell coalescence to some extent. The foam with smaller cell size and larger cell density absorbed more energy, hence the impact strength increased remarkably with decreasing cell size and increasing cell density.
Synthesis and Crystal Structure of Bis(L-α-N-(2-Pyridylmethy)phenylalaninato-N, N', O)-Zinc(II) Trihydrate
Authors: You Qi , Cui Yu , Sun Guo Xin , Yang Yu Lan
Published: May 2011

N-(2-pyridylmethyl)-L-phenylalanine methyl ester was synthesized in our laboratory，and the title compound was synthesized by the reaction of N-(2-pyridylmethyl)-L-phenylalanine methyl ester and Zinc acetate dehydrate. Bis(L-α-N-(2-pyridylmethy)phenylalaninato-N, N', O)-Zinc(II) trihydrate was prepared and structurally characterized by X-ray diffraction. It crystallizes in orthorhombic, space group P21212 with a= 15.0928 (8), b = 16.4209 (6), c = 5.9930 (3) Å, V = 1485.29 (12) Å3, Z = 2, Mr= 630.00, Dx = 1.409 g/cm3, μ = 0.88 mm-1, F(000) = 660, Rint = 0.0205, R = 0.028 and wR = 0.059 for 2943 observed reflections with I > 2σ(I). It is a mononuclear discrete structure. The zinc atom coordinates with two oxygen and four nitrogen atoms from two ligands in a distorted octahedral geometry, with the oxygen atom from the carboxylate, two of nitrogen atoms from NH parts and the other two nitrogen atoms from the pyridine ring. With three free water molecules, the present structure has a network of hydrogen bonds.
The Third-Order Nonlinear Optical Properties and the Optical Limiting Properties of Sulfonic Metallo-Phthalocyanines
Authors: He Chun Ying , Qun Wu Yi , Chen Zhi Min , Song Ying Lin , Shi Guang , Duan Wu Biao , Wang Bin , Zhang Wang
Published: May 2011

The optical limiting properties of CuPcTs, NiPcTs and CoPcTs were investigated with nanosecond pulses at the wavelength of 532nm. Among them, CuPcTs exhibits the strongest optical limiting effect. An explanation based on nonlinear absorption and refraction is provided. And also, the relationship between the d-electron configuration and the third-order nonlinear optical properties of CuPcTs, NiPcTs and CoPcTs were discussed.
Chemical Composition and Allelopathic Potential of the Essential Oil from Datura Stramonium L.
Authors: You Li Xin , Wang Shu Ju
Published: May 2011

In this paper, we analyzed the chemical composition of the essential oil fromDatura StramoniumL. and determined their phytotoxic activity on five cultivated crops. The main components of essential oil were sterols and their derivatives, and the major constituents were 5.alpha.-Ergosta-7,22-dien-3.beta.-ol (16.53%), 3-Hydroxycholestan-5-yl, acetate (14.97%), and 26,26-Dimethyl-5,24(28)-ergostadien-3.beta.-ol (10.39%). The essential oil and its aqueous saturated solution fromD.Stramoniumsignificantly inhibited the germination and growth of lettuce, radish, common bean, maize, and cucumber. The results indicated thatD.Stramoniummay release allelochemicals, both water-soluble and volatile compositions, into environment to inhibit other plant species.
A Novel Exhaust-Driven Adsorption Icemaker on a Fishing Boat
Authors: Qi Xiao Ni , Liu Zhen Yan
Published: May 2011

Adsorption refrigeration is an effective way to use low-grade energy sources such as industrial waste heat without damaging the environment. A novel exhaust-driven adsorption icemaker on a fishing boat is introduced in this paper. Based on the previous study, combining with the single adsorption cooling tube technique, this paper presents an adsorption cooling unit with unique structure driven by exhaust waste heat (hereinafter referred to as "waste heat cooling tube" WHCT). Different with the previous tubular structured adsorption bed, WHCT is made of seamless stainless steel pipe, the adsorbent bed, evaporator / condenser are all placed in one tube. Adsorption working pair of calcium chloride-ammonia has been proposed and developed for adsorption cooling. The working principle and structure are introduced in this paper.
CCD Imaging Definition Controlling Methods in Continuous Casting Slab Surface Defects Acquisition
Authors: Zhao Li Ming , Qi Ou Yang , Chen Deng Fu , Zhang Xing Lan
Published: May 2011

In hot slab continuous casting (CC) process, the Machine Vision (MV) inspection method for slab surface defects has been becoming a research focus with the development of charge-coupled device (CCD) camera imaging technologies. To acquire a informative and reliable defects image is a prerequisite that means a maximum defects detection rate and minimum false recognition in the next image processing stage. In this paper, based on the CCD imaging principle and definition evaluation algorithm, the slab surface radiation feature at high temperature and CCD optical imaging properties had been analyzed under the focal plane, meanwhile, the CCD image definition of optical integral time controlling method had also been studied, which the defect image variance (IV) function, image average gradient (IAG) and information entropy (IIE) were calculated and analyzed. In the end, the image definition controlling algorithm for hot slab surface ROI imaging that adopted IIE evaluation algorithm, based on CCD integral time imaging controlling principle, had been proposed. This method also can support practical value for other machine vision engineering.
The Pore Fractal Characteristics of Concrete Materials under Salt Freezing Conditions in Cold Area
Authors: Tang Ming , Tian Yong , Mu Xiao Bo , Jiang Ming
Published: May 2011

For further research on durability of concrete material under salt frozen conditions in cold area, the non air-entraining concrete with water-binder ratio of 0.4 and 0.28, air-entraining concrete with water-binder ratio 0.28 and the air content 7.0% are studied respectively. The fractal dimension of three kinds of concrete pore at different pore diameter range were determined by MIP(mereury intrusion porosimetry) before and after salt freezing and were studied in a comparative way. The research shows that the fractal dimension of pore diameter at range of 50nm ~ 550nm after salt freezing changed remarkably, namely salt frozen process has greater influence on pore within this range. Objectively the pore within this range in concrete suffered supercooled water osmotic pressure is the greatest. In addition, the total porosity reduced after salt freezing injury while fractal dimension changed more obviously. The fractal dimension of concrete pore could be a good reflection of concrete structure after salt freezing injury, showing that the diameter at 50nm ~ 550nm after salt frozen injury coarsening is obvious. Thus the fractal dimension of diameter within this range can be used as a key parameters after salt freezing injury.
QSPR/QSAR Study of Mercaptans by Quantum Topological Method
Authors: Chen Xuan , Nie Chang Ming , Wen Song Nian
Published: May 2011

A new molecular quantum topological index QT was constructed by molecular topological methods and quantum mechanics (QM), which together with Gibbs free energy(G), Constant volume mole hot melting(CV) that were calculated by density functional theory (DFT) at the B3LYP/6-31G(d) level of theory for mercaptans. Index QT can not only efficiently distinguish molecular structures of mercaptans, but also possess good applications of QSPR/QSAR (quantitative structure-property/activity relationships). And most of the correlation coefficients of the models were over 0.99. The LOO CV (leave-one-out cross-validation) method was used to testify the stability and predictive ability of the models. The validation results verified the good stability and predictive ability of the models employing the cross-validation parameters: RCV, SCVand FCV, which demonstrated the wide potential of the index QT for applications to QSPR/ QSAR.
Properties of Thermoplastic Dialdehyde Sweet Potato Starch Affected by Carbonyl Contents
Authors: Zhang Shui Dong , Wang Xiu Li , Wang Yu Zhong
Published: May 2011

Dialdehyde starch has been used to improve comprehensive properties of thermoplastic starch (TPS) in this study. Dialdehyde sweet potato starch (DASS) with various carbonyl contents has been prepared using sodium periodate to oxidize sweet potato starch in the neutral condition. The structure properties of DASS were analyzed by SEM and XRD. The results demonstrate that DASS with the higher carbonyl content comprise lower crystallization. The thermal, mechanical and biodegradable properties of TPDASS were investigated, and the results illustrate that the moisture adsorption and biodegradable ratio decreases with the Tg of TPDASS with higher carbonyl content. This phenomenon could be attributed to the partial cross-linking of DASS which is due to semi-acetal formation by itself. Meanwhile, the mechanical properties of TPDASS95 were less sensitive to the content of plasticizer. The tensile strength could reach even 12.9 MPa while the water content was higher than 13.5% and the biodegradable ratio was 28%.
Elastic Polyesters from Glycerol and Azelaic Acid
Authors: Kadhum Abdul Amir Hassan , Baharu Mohd Najib , Mahmood Mohd Hilmi
Published: May 2011

Elastic polyester from glycerol and azelaic acid with different molar ratio was synthesized by simple catalyst-free esterification reaction. The ratio of azelaic acid to glycerol used in this experiment was 1:2, 1:1 and 2:1. The polyester with ratio 1:2 and 1:1 appear as clear, bubble free, non tacky and flexible after 48 hours at 125°C while the polyester with the ratio of 2:1 was cured after extension of 60 hours. The formation of ester bonds of the polyester produced is detected on the monomer molecular ratio and also on the efficiency of water removal during esterification process.
Fatigue Strength Study on Different Structure Type of Hatch Corner
Authors: Xie Yong He , Wang Wei , Zhang Heng
Published: May 2011

The fatigue strength study of the hatch corner is carried out ,based on the S-N curve method and the assumption of the linear cumulative damage of Palmgren-Miner's rule, using the hot spot stress method. Study on the effect of the structure different type to the fatigue strength of the hatch corner is carried out through changing its construction details and thickness. By comparing, the reasonable structure is obtained, and the scale effect should be put into consideration in fatigue design.
Hydration Characteristics and Hydration Products of Tricalcium Silicate Doped with Superplasticizer and Silica Fume
Authors: Ding Qing Jun , Wang Yu , Huang Xiu Lin
Published: May 2011

By using XRD, isothermal microcalorimetry, ESEM, EDS, NMR, the effects silica fume and polycarboxylate superplasticizer (PC) on the hydration behavior of tricalcium silicate (C3S) paste were researched. The results show that: PC suppresses the hydration of C3S while silica fume promotes the hydration of C3S by consumption of generated Ca(OH)2. Both PC and silica fume change the morphology of hydration products C-S-H gel from needle-bar-like to reunion-like, along with the polymerization state of silicon-oxygen tetrahedron varied greatly. Especially silica fume significantly affects Q1, Q2 percentage of silicon-oxygen tetrahedron.
Stability and Synthesis of Dispersion Polymerization of Acrylamide in Ethanol/Water Media
Authors: Zhang Qing Xuan , Li Yu Wei , Wang Jing
Published: May 2011

Dispersion polymerization of acrylamide (AM) has been carried out in ethanol/water (90 v% ethanol) media with Polyvinylpyrrolidone(PVP) as a stabilizer, several surfactants as co- stabilizers, Sodium hydrogen sulfite (NaHSO3) and ammonium persulfate ((NH4)2S2O8) as a redox initiator(I). The influences of initiators, monomer (AM), stabilizer and co-stabilizer concentration, the ratio and types of nonionic and anionic surfactants, pH on reaction stability and coalescence stability have been investigated. The results showed that as the initiator concentration increased, reaction stability declined, but the coalescence stability of emulsion increased. As the monomer mass percent lower than 20%, mass percent of PVP stabilizer between 6.15% and 8.12%, the high reaction stability reached. The surfactant composite consisted of nonionic and anionic surfactants had a better ability to stabilize the emulsion than any surfactant used alone. When m (OP-10): m (SDS) was 2:3, the mass percent of the emulsion is more than 3%, and the best reaction stability and coalescence stability were obtained. The suitable pH was 6.5.
Research on Reaction Mechanism of SiC and AlF3 in CO Atmosphere
Authors: Wang Jia Ping , Li Yong , Zhu Xiao Yan , Bo Jun , Zhang Jian Fang , Li Hui
Published: May 2011

The reaction between SiC and AlF3 has been investigated in CO atmosphere at high temperature. Experimental results are shown that the reaction intensity between SiC and AlF3 is accelerated with the rise of temperature. At the temperature of 950 (aluminum electrolytic operation temperature is 935±15), the reaction intensity of SiC and AlF3 is not high and the major reaction products are SiF4 gas and Al4C3; Al4C3 occur severe hydration at room temperature which leads to the pulverization of specimens. The unexpected cells stop should try to be avoided or reduced during the usage of Si3N4-bonded SiC sidewall brick in aluminum electrolysis cells because of Al4C3 existents possibly.
A Three-Dimensional Transient Model of Two-Phase Mass Transfer in Anode Side of Passive Direct Methanol Fuel Cells
Authors: Chen Yue Ping , Guo Hang , Ye Fang , Ma Chong Fang
Published: May 2011

A three-dimensional, two-phase, multiple-component, unsteady model for the anode side of passive direct methanol fuel cells is presented in this work. The model is formed by a drift-flux model and can capture in-plane distributions of species along different directions in the cell. After grid independency test, this model is used to investigate numerically transport behaviors in the anode of liquid feed direct methanol fuel cells. The results illustrate the feasibility of the passively delivering methanol to the electrochemical reaction site, and characterize the relevant transport phenomena. Moreover, the evolution of species concentration, velocities along different directions in the cell and the mass transfer limitation were also presented. The three-dimensional model is valuable for understanding and predicting mass transfer in passive direct methanol fuel cells.
Fluorescence Spectroscopic Studies of Interaction between 4-Aminobenzenesulfonic Acid and Bovine Serum Albumin
Authors: Liu Jian Li , Cao Xiang Yu , Lu Xiu Li , Huo Ya Peng
Published: May 2011

The interaction between 4-aminobenzenesulfonic acid and bovine serum albumin (BSA) had been studied by fluorescence spectroscopy. The binding constant (K=2.51×104) and binding points (n=0.998) of 4-aminobenzenesulfonic acid with BSA were determined at 298 K based on fluorescence quenching results. The thermodynamic parameters such as enthalpy change (ΔH), entropy change (ΔS) and Gibbs free-energy change (ΔG) for the reactions were also calculated according to the thermodynamic equations. The negative ΔH and ΔS values in case of 4-aminobenzenesulfonic acid-BSA complexes showed that van der Waals interactions and hydrogen bonds might play a major role in the binding of 4-aminobenzenesulfonic acid to BSA. The distance, r, between donor (BSA) and acceptor (4-aminobenzenesulfonic acid) was obtained according to the Förster’s theory of non-radiation energy transfer. The results of synchronous fluorescence spectra revealed that 4-aminobenzenesulfonic acid induced conformational change of BSA.
Discussion on the Decomposition Laws of Limestone during Converter Steelmaking Process by Static Decomposition Model under Constant Temperature
Authors: Guo Luo Fang , Li Hong , Li Zi Quan , Li Yong Qing , Song Wen Chen , Feng Jia
Published: May 2011

Variations of decomposition rate and decomposition layer thickness of six spherical limestone particles with different sizes are calculated and compared with each other by the experiments and model of static decomposition of limestone under constant temperature. The results indicate that: the decomposition process of limestone can be explained by unreacted core model (UCM) when it is heated sharply; the decomposition rate of large particle is greater than that of small one; the smaller particle size, the larger decomposition layer thickness in unit time.
The Influence of Indian Concentrate Chrome Ore on Top Quality Magnesite-Chrome Brick for RH Degasser
Authors: Li Rui , Li Yong , Wang Dong , Li Yang
Published: May 2011

The top quality magnesity-chrome adding Indian concentrate chrome ore as investigated at this present. The samples adding 5%、10%、15%、20% Indian concentrate chrome ore respectively are prepared. The results shown that the thermal shock resistance of the brick is improved by adding right quantity of Chromium Concentrate and the brick which adding Chromium Concentrate have a better performance.
Influence of Sol Compositions on Boron Adsorption by Boron-Selective Hybrid Gels
Authors: Liu Hai Ning , Ye Xiu Shen , Zhang Hui Fang , Wu Zhi Jian
Published: May 2011

Hybrid gels with boron-chelating groups were prepared using bis(trimethoxysilylpropyl)amine (TSPA) and the precursors synthesized from (3-glycidoxypropyl)trimethoxysilane (GPTMS) and N-methylglucamine (MG). Boron adsorption by the hybrid gels and a commercial boron-selective resin D564 were compared. The experimental results demonstrated that sol compositions have a great effect on the boron adsorption by the hybrid gels. Changing the sol compositions is a convenient way to adjust the adsorption capacity of the hybrid gels. The highest boron adsorption amount of the hybrid gels was found to be 1.54 mmol g-1, higher than that of the commercial resin D564 (1.39 mmol g-1). The hybrid gels reported in this study are easy to prepare, having a higher adsorption capacity and a good mechanical strength.
Ordered Nano-Laminated Films and Fluorescence Dynamic Characterization of Tb-Bisphthalocyanine
Authors: Zheng Chun , Sun Sheng Nan , Ma Li Min , Marí B , Cui Hai Ning
Published: May 2011

Stable monolayers of Tb (III) -ocat-4-n-nonyloxyphthalocyanine (TbPc2) and TbPc2 blended with amphibious arachidic acid (AA) on air-water interface have been obtained and their solid multilayers have been successfully deposited by Langmuir-Blodgett (LB) technique. The characteristics of their structure and fluorescence are disclosed. The multilayer has a periodic layered structure with a layer spacing of 2.2 nm. Fluorescence lifetime results suggest that the excitons exist by photo-excitation in the film of TbPc2.
Influence of Sodium Tartrate on the Precipitation of Magnesium Carbonate
Authors: Guo Min , Guo Tan , Li Quan , Wu Zhi Jian
Published: May 2011

Magnesium carbonate precipitation by the reaction of MgCl2 with Na2CO3, using sodium tartrate as an additive was studied. The effects of sodium tartrate concentration, reaction temperature, and stirring speed on the precipitation were investigated comprehensively. Scanning electron microscopy (SEM) and X-ray powder diffraction methods were used to characterize the carbonate precipitate products. Sodium tartrate concentration, reaction temperature, and stirring speed have significant effects on the morphology of the carbonate products. Sodium tartrate has an inhibitive effect on the precipitation. The product weight decreases with the increase in the amount of sodium tartrate added, and with the increase in reaction temperature, but is almost irrelevant to the stirring speed. The products obtained at 25 and 50°C were all identified as nesquehonite. The experimental results show that the use of an additive would be an effective method to adjust the morphology of magnesium carbonate.
Preparation, Characterization and Decolorization Performance of Magnetic Fe-Mn Binary Oxide with High Surface Area
Authors: Jia Zhi Gang , Peng Kuan Kuan , Li Yan Hua , Zhu Rong Sun
Published: May 2011

Magnetic mesoporous Mn-Fe oxide catalyst with high surface area was prepared by calcining the corresponding oxalate precursor. The calcined sample was characterized by XRD, FTIR, N2 adsorption, TEM, and SEM. The catalytic property of the porous Mn-Fe oxide catalyst was evaluated by catalytic decolorization of methyl orange (MO). XRD, SEM, and TEM analysis and N2 adsorption–desorption isotherm revealed mesoporous Mn-Fe oxide strucutre with high-surface area and uniform pore-size distribution. The results of catalytic performance measurements showed that the Mn-Fe binary oxide was an effective catalyst. The as-prepared catalyst could be recycled as a magnetically separatable catalyst to treat dye-containing wastewater.
Desorption and Reusable Properties of a New Boron-Selective Hybrid Gel Adsorbent
Authors: Ye Xiu Shen , Gao Xiao Lei , Liu Hai Ning , Wu Zhi Jian
Published: May 2011

A hybrid gel adsorbent bearing boron-selective functional groups was prepared by the reaction of bis(trimethoxysilylpropyl)amine (TSPA) and a gel precursor in water. The gel precursor was synthesized from (3-glycidoxypropyl)trimethoxysilane (GPTMS) andN-methylglucamine (MG). The boron adsorption behavior of the gel and a commercial boron-selective resin D564 was investigated. The gel adsorbent has a suitable mechanical strength and an adsorption capacity of 2.00 mmol g-1, which is higher than that of the resin D564 (1.64 mmol g­-1). Boron can be desorbed from both the gel and the resin D564 with a 0.25 mol L-1HCl solution. The good reusability of both the gel and the resin D564 was confirmed by fourteen consecutive adsorption-desorption-regeneration cycles.
Synthesis of Sr2Si5N8:Eu2+ Phosphor for Enhanced Red Emission
Authors: Luong Van Duong , Zhang Wen Tao , Lee Hong Ro
Published: May 2011

For removing impurities to improve luminescence properties, Eu2+- activated Sr2Si5N8 red phosphor for white light-emitting diodes (LEDs) was prepared by multiple heat-treatment synthesis which includes carbothermal reduction and nitridation. The X-ray diffraction (XRD) patterns were showed the standard single phase of Sr2Si5N8. With an optimized amount of Eu2+ (2 at. %) dopant, the broad excitation band of Sr2Si5N8:Eu2+ indicated that the phosphor was suitable for application of white LEDs with UV or blue chip, and red emission peak at 628 nm in spectra originating from the 4f65d1→4f7 transition of Eu2+ ion. After third heating process, luminescence properties of the obtained phosphor were improved obviously and higher than commercial YAG:Ce3+ phosphor.
Brazing of Low Carbon Steel Automotive Radiator Pipe Using of Cu-Zn Alloy
Authors: Li Yu Long , Yang Jin , Li Wei , Yu Ye Xiao
Published: May 2011

In order to join the automotive radiator pipe with high-quality and high-efficiency, flame and induction brazing experiments of steel radiator were carried out using Cu-Zn alloy. Results show that Cu-Zn brazing filler metal can wet the steel well under different heating conditions. The average tensile-shear strength of the brazed joints was more than 400MPa. Brazing experiments of automotive radiator pipe were carried out for comparing the heating methods. Results show that the joints acquired by the induction brazing method were much better in the appearance, further; the amounts of brazing alloy were relatively less. Brazed radiator pipes were then electroplated, and sealability tests of the brazed pipe were investigated, which indicated the pipes and joints remained in good condition after the tests.
Effect of Heat Treatment on Phase Transformation and Precipitation Behavior of Cu40Zn-1.0 Wt% Ti Brass via Powder Metallurgy
Authors: Li Shu Feng , Imai Hisashi , Kojima Akimichi , Kosaka Yoshiharu , Yamamoto Koji , Takahashi Motoi , Atsumi Haruhiko , Kondoh Katsuyoshi
Published: May 2011

The effect of heat treatment on phase transformation, precipitation behavior and micro-hardness response of Cu40Zn-1.0Ti brass was investigated via powder metallurgy method. The volume fraction of α phase increased with elevated temperature, equaled to that of β phase at 400 °C, and reached to a maximum value of 55.9% at 500 °C. The solid solubility of Ti in Cu40Zn brass matrix decreased with elevated heat treatment temperature, showed high chemical potential for precipitates reaction in Cu40Zn brass. The micro-hardness of the BS40-1.0Ti brass was primarily dependent on the solid solubility of Ti, but also dependent on the phase ratio of α and β phase.
Solubility and Electrical Conductivity of Common Sodium Salts in Selected Ionic Liquids
Authors: M. Alnashef Inas
Published: May 2011

The solubility of different commercially available sodium salts was measured at 120°C for the potential use in the production of sodium metal by electrochemical processes in Ionic liquids (ILs) at relatively moderate temperatures. The results showed that the anion, cation, and substituents on the cation of the IL have a great effect on the solubility of the salts. It was found that the solubility of the salts in some ILs is higher than the value required in the production of sodium metal. An electrochemical method was used to measure the electrical conductivity of the selected ILs. Moreover, the effect of sodium salts on the conductivity of the ILs was studied. The conductivity of IL increased with the dissolution of sodium salts. In general, the conductivity of the studied ILs with/without sodium salts was suitable for the use in the production of metal sodium.
Synthesizing TiAl Alloy by Spark Plasma Sintering from Mechanically Activated Powders
Authors: Wang Zhi Wei , Bu Zhi Xiang , Wang Li Shi
Published: May 2011

Powder of Ti-46at%Al alloy was synthesized through mechanical activation (MA) and then sintered and concurrently consolidated in a short sintering time of 900 s by using spark plasma sintering (SPS) process. The XRD and SEM profiles show that the microstructures of TiAl alloys contained γ TiAl and small amount α-2 Ti3Al phase, whose amount can be controlled by the sintering temperature. The compacts retained the original fine-grained fully densified bodies by avoiding an excessively high sintering temperature. The alloys sintered at higher temperature with this process showed a coarser microstructure. So it is possible to produce dense nanostructured TiAl alloys by mechanically activated spark plasma sintering (MASPS) within a very short period of time.
The Optimization Design Research on the Seismic Control of Large-Span Spatial Structure
Authors: Zhao Xiang , Wang She Liang , Dai Jian Bo , Zhao Xi Cheng , Zhu Xi Yu
Published: May 2011

Focuses on the dynamical collapse of large-span spatial structure, this paper uses giant magnetostrictive material as the main component to design a kind of new GMM actuator, which could used in active vibration control of large-span spatial structure. The genetic algorithm has been used to optimize the position of actuators in large-span spatial structure, and the optimization of the results has been analyzed by numerical simulation. The research shows that the GMM actuator has fine actuator effectiv.
Study of PVC Plasticized by Octodecyl Acyl Tributyl Citrate
Authors: Cui Jin Feng , Guo Jun Hong , Ma Yong Qiang , Li Yan Hua , Qing Cai Xia , Zhou Ying Ping , Zheng Yu , Yang Bao Ping
Published: May 2011

The PVC composite was prepared by extrusion melt using a new plasticizer octodecyl acyl tributyl citrate and PVC resin. Influence on mechanical and resistance to cold properties of PVC was studied by tensile and low temperature impact tests. The thermal behavior, texture and mechanism of plasticizing of OTBC plastifying PVC were supported by TG, DSC and SEM. The result indicated that the glass transition temperature of plastifying material was about 36°C, breaking strength was 25.3MPa, elongation at break was 250% and, plasicizing efficiency was 0.88, resistance to cold property better than plastifying material of DOP’s, domains between two phases of micro-texture were small and distributed homogeneously when OTBC content in PVC resin was 30%.
The Porosity of Liner Effect on the Shaped Charge Jet Penetration
Authors: Gao Yong Hong , Liu Tian Sheng , Huang Min Rong , Gu Xiao Hui
Published: May 2011

Shocking temperature rise of the shaped charge with porous liner before collapse was calculated based on the Herrman equation of state. Shaped charges with 36mm charge diameter were used to fire at the 603 armor steel target, the penetration-standoff curves(P-S) of the shaped charge liner with 88.6% and 90.3%T.D were measured and compared. It is shown that proper porosity is helpful to lengthen the jet break up time and penetration depth，which is of significance for the application of porous liner.
A Study of Cutting Temperatures in Turning Carbon-Fiber-Reinforced -Plastics (CFRP) Composites with Sharp Worn Tools
Authors: Chang Chung Shin , Chang Yuh Ming
Published: May 2011

Temperatures of the carbide tip's surface when turning Carbon-Fiber-Reinforced Plastics (CFRP) composites with a sharp worn main cutting edge tool is investigated. The frictional forces and heat generated in the basic cutting tools are calculated by using the measured cutting forces and the theoretical cutting analysis. The heat partition factor between the tip and chip is solved by using the inverse heat transfer analysis, which utilizes temperature on the carbide tip’s surface measured by infrared as the input. The tip’s surface temperature is determined by finite element analysis (FEA) and compared with temperatures obtained from experimental measurements. Good agreement demonstrates the accuracy of the proposed model.
Accumulation Models of the Natural Gas in the Foreland Basins of China and their Physical Simulation Experiment
Authors: Zhang Hong
Published: May 2011

The paper chooses foreland basin as its research object. after summarizing the accumulation characteristics of the different phases and different parts of them, the common models of the whole foreland basin are given and the physical simulation experiments are carried out. It shows that the foreland basins experience three phases of evolution. Phase 1 is the period that the source rock and structure oil and gas traps form. Phase 2 is the period that multi-cycle reservoir and lithologic oil and gas pool form. phase 3 is the period that foreland uplift belt and fault anticline pool form. Then a foreland basins has three different belts including of thrust belt, foredeep and foreland slope belt, foreland uplift belt, and the belts have different accumulation models. With regard to the hydrocarbon accumulation period of the foreland basin, the thrust belt have precedence to other belt. foredeep and foreland slope belt forms the secondary pools. Foreland uplift belt accumulates hydrocarbon very quickly.
Simulation and Experimental Study of Inverse Heat Conduction Problem
Authors: Chen Ley , Askarian S , Mohammadzaheri M , Samadi F
Published: May 2011

In this paper, a neural network method is proposed to solve a one dimensional inverse heat conduction problem (IHCP). The method relies on input/output data of an unknown system to create an intelligent neural network model. Multi layer perceptrons with recurrent properties are utilised in the model. Prepared input/output data are used to train the neural network. Reliable checking processes are also offered to justify the robustness of the method. A numerical sequential function specification (SFS) method is used as another technique to solve the IHCP. The numerical result is compared with that of the proposed method and good agreement is shown between the two methods. However, the numerical method can be only used to solve the IHCP off-line due to the high computation requirement. The proposed neural network method can be used in real-time situations as shown in the experimental tests.
The Study of Polylactic Acid/corn Straw Fiber Composite Cushioning Material by Hot-Press Forming
Authors: Wang Yu , Zhang Ping , Gao De , Pei Lei
Published: May 2011

In this paper, we have studied the hot forming process of composites made by polylactic acid (PLA) and corn straw fiber. In order to obtain the composite cushioning material with ideal density and expansion ratio, the parameters of processing was optimized. It showed that the optimum condition as follows: the hot-press time was 5min, the pressure was 15MPa and the temperature was 200°C. The structure of the composite was characterized by FTIR.
Evaluation of Antioxidant Activity of Alcoholic Extract from Peanut Hulls
Authors: Bi Jie , Yang Qing Li , Yu Li Na , Sun Jie , Zhang Chu Shu
Published: May 2011

In this article, the antioxidant activity of the crude extract from peanut hulls was tested with phosphomolybdenum complex method, the reduction of K3Fe(CN)6 and DPPH assay. The IC50 value for DPPH radical scavenging lied 14.86μg ml-1, and 28 μg mL-1 of PHF exhibited total antioxidant activity and reducing power which were comparable to that of the ascorbic acid standard at 52.41 and 15.41 μg mL-1, respectively.
Synthetic Technics of Methyl Acrylate through Aldol Condensation with a Multisubsection Fixed-Bed Reactor
Authors: Jing Tao , Tian Jing Zhi , Sun De Zhi
Published: May 2011

Two types of catalysts, V2O5-P2O5/SiO2and Cs-Sb2O5/SiO2, were separately prepared with SiO2as carrier. Their catalytic properties were investigated in the process of synthesizing methyl acrylate through aldol condensation with methylal and methyl acetate, and the influence of the catalyst’s filling up technique on the reaction was studied. Reactions were performed in a fixed-bed reactor. The research results indicate that aldol condensation reaction is effectively promoted when the two catalysts were filled up in appropriate subsections of the reaction tube. Specifically, when V-Si-P Oxide was filled up at the 4thsubsection and Cs-Sb2O5/SiO2catalyst at the 6thsubsection with the temperature of the reactor at 400 °C and the mol ratio of methyl acetate and methylal at 1.6:1 and the space velocity at 3.2 h-1, then the conversion rate of methylal was 50.9%, the selectivity of methyl acrylate was 90.63%, and the ester yield of methyl acrylate was 46.15%.
Preparation and Characterization of Thin Films TiO2 Prepared by Various Amount of Triton X-100 Surfactant for Photodegradation of a Dye Pollutant
Authors: Sanguanruang Sudjit , Leotphayakkarat Rachan , Fangern Nitikarn , Koonsaeng Nattamon , Chawengkijwanich Chamorn
Published: May 2011

Dipping borosilicate glass in modified sol-gel solution was used to prepare thin film TiO2. The sol was prepared from titaniumtetraisopropoxide(TTIP), hydrochloric acid (conc. HCl), ethanol(EtOH), TritonX-100 surfactant and acetic acid(AcOH). The mole ratios of the starting solution were surfactant: EtOH: AcOH: TTIP: conc.HCl= R: 45: 6: 1: 0.1. The amounts of surfactant (R value) were varied as 0, 0.5, 1, 2, 3 and 4 moles, respectively. After dip-coated, the borosilicate glasses were dried at room temperature and heated for 15 minutes at 500 °C (rate3°C/min). The obtained films were uniform; however, varied in transparency, decreasing when the TritonX-100/TTIP mole ratios had been increased. The crystal structure, optical property and the morphology of thin films TiO2 were characterized by X-ray diffraction (XRD), UV–Vis spectroscopy, Environment Scanning Electron Microscope (E-SEM) and Atomic Force Microscopy (AFM). Spectra of XRD showed that all the TiO2 thin films were anatase phase. From UV–Vis technique, it was found that their UV absorption edges were approximately 380 nm. A cracking on the surface of TiO2 thin films appeared when the amounts of the surfactant were increased. From AFM image, TiO2 particles were spherical size, ranged from 11.2 to 35.5 nm and the roughness of the films increased with the increasing of TritonX-100/TTIP mole ratios. Under UV illumination, the photodegradation results of Reactive Yellow17 was pseudo the first order reaction and the film of TritonX-100/TTIP mole ratio = 1 : 1 was the highest removal efficiency with the apparent rate constant (k) = 2x10-2 min-1 and half life (t1/2) = 34.65 min.
The Cyclization of 2-Chloro Nicotinic Acid
Authors: Zhang Qi Wei , Cheng Yao , Guang Wang Ya
Published: May 2011

Studied the craft of synthesize 2-ChloroNicotinicacid, which was 3-Dimethylamino -acrolein and Eethylcyanoacetate as raw materials, synthesized 2,4-pentadienoicacid-2-cyano-5- dimethylaminoethylester, then used HCl gas to cyclize it, the product Ethyl 2-chloronicotinate was hydrolyzed to get 2-chloronicotinicacid. The effects of solvent and catalyst were discussed. The results showed that 2,4- pentadienoi cacid – 2-cyano-5-(dimethylamino) ethyl ester can be dissolved in dimethylethane at low temperature, so that it avoided the own polymerization when cyclization synthesis Ethyl 2-chloronicotinate. The yield was 91.84%. The craft was simple and had less steps and higher yield; there is the potential for industrialization
Selective Reduction of Chloronitrobenzene to Chloroaniline on Ni/Al2O3 Catalysts Got-up Ionic Liquids
Authors: Huang Xing , Zheng Mang , Wang Yu Xiang , Li Dan Dan , Zhao Ya Juan
Published: May 2011

Ionic liquids-modified Ni/Al2O3 catalysts are found to be alternatively excellent media for the heterogeneously catalyzed hydrogenation of halonitrobenzenes to corresponding haloanilines.It gives rise to higher selectivity and lower dehalogenation in the hydrogenating process compared with that observed in conventional nickel catalyst.
The Decolorization Property of Azo Dyes Using a Tsukamurella Sp. J8025 Isolated from Activated Sludge
Authors: Wu Wen Tung
Published: May 2011

A Tsukamurella sp. J8025 with the capability of removing the synthetic dyes (methyl orange) was isolated from activated sludge. The strain J8025 grew well in aerobic and semi-aerobic condition, but the best decolorization was in semi-aerobic culture (static condition). For the optimal decolorization, the most suitable pH and temperature were pH 6.0 and 30°C. More than 80% of methyl orange was decolorized in the LB medium within 4 days of incubation. The decolorization rate could be strongly promoted to over 90% in LB media with glucose within 2 days of incubation. This probability of reason for the consumed glucose as the best energy source was to enhance the cell growth and decolorization activity.
Research on Polarization Curve and Anode Discharge Mechanism in Electrolysis Cells for Preparation of Al-Li Alloys
Authors: Li Ji Dong , Zhang Ming Jie , Wang Yi Yong , Ai Xin Gang
Published: May 2011

At 953K, anodic over voltage by electrolyzing LiCl and Li2CO3 were measured respectively by continuous pulse oscillograph method in a mixture fused salt of LiCl-LiF in a laboratory electrolyte cell and the change of polarization curve obtained was studied as well. According to kinetics of electrode process theory, we calculated and analyzed anode reaction mechanism and reaction rate-determining step. The results indicate that when over voltage entered into the Tafel zone with current density in range of 0.1 to 0.3A·cm-2, electrode reaction of LiCl is controlled by electrochemical polarization but electrode reaction of Li2CO3 is controlled by chemical polarization. With current density increase further beyond the Tafel zone (i>0.4A·cm-2), electrode reaction is changing gradually from dual control influenced by electrochemistry or chemistry united with concentration polarization to single concentration polarization. While electrolyzing Li2CO3, it is complexing oxygen ions discharging on carbon anode slowly that determine the whole electrode reaction rate.
Application of Chemical Grouting Material in the Controlling Process of Argillaceous Roadway under Rich Water Condition
Authors: Zhao Yi Ming , Kan Jia Guang , Liu Kun
Published: May 2011

Weakening phenomenon of argillaceous surrounding rock under water effect universal exists in the excavation and supporting process of roadway in coal mine, the destructive effect of water acting on the argillaceous surrounding rock serious threatens the coal mine safety production. In this paper, the application of chemical grouting material in the control process of argillaceous roadway under rich water condition was studied. Simultaneously the sealing and strengthening mechanism of chemical grouting and its advantages were also analyzed. A filed application of the technique was aslo conducted and the observation results in-situ identify that chemical grouting combined with high-performance supporting technology can effectively maintain the long-term stability of argillaceous roadway under rich water condition.
Study on the Rheological Properties of PTFE/PVA Blended Solution
Authors: Wang Yao Wu , Sun Run Jun , Zhang Zhao Huan , Chen Li Ping , Yao Mu
Published: May 2011

PTFE suspension latex and PVA solution are blended at different ratio, and the rotary rheometer is used to test the rheological properties of these solutions. The result shows that both PTFE suspension latex and PTFE/PVA blended solution are all shear thinning fluid; with increasing shear rate, apparent viscosity decreases; with increase of PVA content in blended solution, apparent viscosity and Non-Newtonian index increase, and spinnability of blended solution can be improved; with increase of temperature, the apparent viscosity decreases.
Molecular Design of Solvents for Extractive Distillation
Authors: Song Jing , Qi Tao , Qu Jing Kui , Zhang Xue Gang , Shen Wei Feng
Published: May 2011

This paper presents an optimization technology for the molecular design of environmentally friendly solvents for extractive distillation. The approach based on the concept of group contribution methods (GCM). To decrease the complexity and random of design problem, a set of functional groups are pre-selected based on the modified UNIFAC method. Combination of groups can produce different molecule, once the molecule is generated, the properties are evaluated to determine if it satisfy the criteria. The criteria include separation performance and environmental performance. Simulated annealing algorithm is used to search feasible molecular structures. The molecule transition strategies and parameters of algorithm are described detailedly. Finally, the method is demonstrated with two examples, and the design results show that the proposed technology is a valid technology to design the desirable solvents.