Materials Literature
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In this paper we studied three major factors which have important effect on the extraction of polysaccharide,they are the solids/the liquids,temperature and extraction time.The results of the thogonal experiment show that the optimal extraction condition was composed of the solids/the liquids 1 ∶ 8(g/mL),temperature 9…
Linear shape charge may produce high speed jet once high explosive is detonated.To study the detonation process of the high explosive and jet formation of the linear shape charge,a three-dimensional numerical simulation program is developed by using the material point method(MPM).Velocity,density,pressure distribution…
For the purpose of detecting the sensitive parts of an embedded atom method(EAM) potential which is considered to be used in molecular dynamics simulation of radiation effects of Zirconium, we introduce a modulation function to modify the pairwise potential and the atomic electron-density distribution of the EAM poten…
In this study,some algal specimens were collected from the southern part(43°20′~43°50′ N,88°19′~88°54′ E,1 104~1 148 m a.s.l.) of the Dabancheng rift valley in Urumqi,Xinjiang,China in June and August 2010,where many wetlands including rivers,swamps,lakes and ponds are distributed.Desmids are very rich in the study ar…
Apart from the processing technology for spunlaced nowovens,the properties of the raw materials also have an important influence on product performance. The result shows that the morphological structure,flexural rigidity,fineness,length,breaking strength and water regain are the important influencing factors. Of which…
The residual solvent content of the dimethyl sulfoxide(DMSO) is a key to measure the performance of the PAN precursor products,is the main cause of formation of PAN precursor surface and internal defects,the residual content of PAN precursor manufacturing process will directly affect the yield and quality of PAN precu…
In order to investigate the effect of surface nanocrystalliztion on the low temperature gas nitriding,the surface nanocrystallization is realized on 20Cr steel by using supersonic fine particles bombarding(SFPB),and followed by low temperature gas nitriding.The microstructure was characterized by XRD and TEM,and the h…
Zn2 + in-situ doped nano-LDHs material was prepared in the two-stage reactor by reaction of the salt solution of MgCl2.6H2O,AlCl3.6H2O,ZnCl2.6H2O,and the alkali solution of Na2CO3,NaOH.XRD,TEM,TG were employed to analyze effect of doped Zn2 + on crystal structure,morphology and thermal stability of MgAl-CO3LDHs.The re…
In order to further study the tensile properties of the polyester yarn,the yarn was processed by styrene-butadine-styrene(SBS)and polyurethane(PU).Tensile properties were tested and the results were analyzed.The experimental results indicated that there were close relations between tensile properties and the kind of r…
The research object is the oxygen-enriched air reformer in Shanxi Huaxin Chemical Fertilizer Co.Ltd.The effect of H2O on the flame speed and NO formation characteristics of coke oven gas is studied with the Chemkin software using a detail methane kinetic mechanism containing 53 species and 325 elemental reactions.The…
In this article di( 2- ethylhexyl)- 1,2- cyclohexane dicarboxylate( DEHCH) was synthesized by the reaction of HHPA with iso-octanol using concentrated sulfuric acid as catalyst. The effects of DEHCH content on the mechanical properties,volatility and migration stability in solvents of poly( vinyl chloride) were studie…
To elucidate the mechanisms of nano-silica induced cytotoxicity and oxidative stress in vivo and in vitro.ICR mice were contaminated using nano-silica three times by oral gavage.The level of MDA(malondialdehyde) and SOD(superoxide dismutase) in the lung tissue were detected as in vivo toxicity endpoints for nano-silic…
Mg2Y8Si6O26∶Ce3+,Mn2+ phosphor was synthesized by the high temperature solid-state reaction,and the structure and luminescence properties were characterized by X-ray diffraction(XRD) and fluorescence spectrophotometer.The XRD pattern demonstrated that the synthetic material belongs to the hexagonal phase of Mg2Y8Si6O2…
6,7-Epoxycitral was prepared by the reaction of citral with m-choloroperbenzoic acid(mCPBA) in the solvent of methylene chloride.When the reaction time was eight hours,the molar ratio of mCPBA to citral was 1.1 ∶ 1,and the reaction temperature was 0 to 10 °C,the yield of 6,7-epoxycitral reached 75.0%.6,7-Epoxycitral w…
Polyacrylonitrile were modified by KMnO4 and extended at high temperature.With the analysis of sound velocity orientation instrument,Fourier infrared spectrum(FTIR),differential scanning calorimetry(DSC) analysis and tensile testing,the structures and characterizations of the original and modified polyacrylonitrile an…
The research of solid catalyst preparation technologies has always been an important part of the development of catalytic technology. In this paper,the recent research progress of solid catalysts conventional preparation methods has been summarized. Several kinds of solid catalysts preparation methods are mentioned,su…
Aiming at utilization status of bulk curing barn energy in China,existing problems were analyzed. It was pointed out that the development of bulk curing barn should depend on development of new energy sources and mixed using,innovative energy-saving barn,and study energy-saving baking process,emphasis on energy conser…
Polyamidoamine(PAMAM) dendrimers are synthetic molecules which are now widely used as vectors in drugs delivery and gene transfer research.Since folic acid(FA) receptor is over-expressed on the surface of tumor cells,the tumor-targeting effect of dendrimers can be improved though grafting folic acid at the terminal of…
Lithium manganese oxide, as a future cathode material for Li-ion batteries, has become one of most focused material in recent years. But its poor high-temperature performance hinders its further application. In this research, SiO2 was used to modify the surface of this material. And X-ray diffraction(XRD), scanning el…
To obtain a kind of new material of lithium ion battery septum,with Lithium Tert-butoxide as the catalyst,a polymer electolyte of poly( ethylene-co-vinyl alcohol) end-capped with lithium sulfonate( EVOH-SO3Li)is synthesized from poly( ethylene-co-vinyl alcohol)( EVOH) and 1,3-propane sultone,the EVOH-SO3Li non-woven m…