Materials Literature
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An S-rail impact model was established based on the parameters extracted from a true rail used in vehicle frame.An optimum crashworthiness design method was presented and utilized to obtain parameters of the S-shaped rail structures.The methodology adopted in this research made use of design of experiments(DOE),finite…
In this study,Polylactic Acid-Polyethylene glycol(PLA-PEG) was synthesized via melt copolymerization.The influence of the type and the amount of catalyst,the reaction temperature,the reaction time,the type and the amount of PEG on molecular weights of products are discussed.The performances of products are analyzed.Th…
Ionic liquid [Bmim ] PF6 was prepared under microwave heating and used as the reactive medium for preparation of TiO2/PMMA under microwave irradiation. Photocatalytic activity of the TiO2/ PMMA was investigated for degradation of methyl orange under ultraviolet irradiation. The TiO2/PMMA material was characterized by…
Two of the proposed High Temperature Gas Reactors (HTGRs) under consideration for a demonstration plant have the design object of avoiding creep effects during normal operation. The goal of negligible creep could have different interpretations depending upon what failure modes are considered and associated criteria fo…
The main mechanism of eddy current losses and hysteretic loss of Sendust Soft-magnetic alloy material used in dynamic field and high frequency was studied in this thesis,and process of experiment design was detail introduced.Accordingly the course that how to prepare the Sendust soft-magnetic alloy material's used in…
The aligned carbon nanotubes were synthesized by catalytic thermal decomposition.In this experiment,xylene was used as the carbon source with ferrocene as the catalyst precursor,H2and Ar as the carrier gas.The effects of process parameters on the orientation of the growth of carbon nanotubes were investigated.The resu…
The ZrO2 films,doped with different contents of Y2O3,were grown by electron beam evaporation.Its microstructures and optical propertied were characterized with X-ray diffraction(XRD),scanning electron microscopy(SEM),and atomic force microscopy(AFM).The influence of the film growth conditions on its properties was stu…
In recent years,much progress has been achieved in the development of biodegradable products using agricultural materials as basis,for the environmental threats restrict the use of non-degradable polymers.In order to obtain a cost-effective biodegradable plastic,a novel environmental-friendly starch/poly(butylene succ…
The printed circuit board(PCB)copper plating include to copper electroplating,stannum electroplating,nickel electroplating and aurum electroplating etc..Among them electroplating copper is an important craft within the circuit board manufacture,this text is main to introduce the craft technique of electroplate the cop…
Myocardial infarction is one of the main causes of death.Stem cells transplantation is a new method in treatment of myocardial infarction.Mesenchymal stem cells can differentiate into cardiocyte in vivo or in vitro.Both animal and clinical experiments indicate that locally delivered MSCs can promote vascular rengenerr…
By making use of potentiodynamic polariza-tion test,immersion test,and three-point bending stress corro-sion test,and in association with analysis of the corrosion prod-ucts by means of X-ray diffraction and scanning electron micros-copy,the corrosion resistance of 1Cr18Ni9Ti stainless steel in the aqueous solutions o…
Epoxy resin is toughening modified by acrylonitrile butadiene rubber(NBR),the performance of resin after modified is characterized.The result shows,the toughness of EP increase with the increasing of NBR content,and reached the top at 15%.The content of curing agent influenced mechanic performance of resin,and it is b…
Polyhydroxyalkanoates(PHAs)biosynthesized by enormous microbes has been well studied as one of new biomaterials with the most development potential.The recent advances in biosynthesis,recovery and purification,modification,and applications of PHAs,as well as its current production status are reviewed,and the future de…
The sponge spicules occur commonly in Palaeozoic marine carbonate rocks.Under microscope,the spicules could be discerned in thin sections by their distinct external morphology and optical characters.The glauconitized spicules were scarcely documented in literatures.Eisenack(1978) reported the finding of a fragmentary…
Needle-punced nonwovens is a kind of multiple void structure materials and own excellent acoustical absorption performance.Its prodution process is easy,raw materials source is rich and it has abroad application prospect.With people regarding environment,people look for way to eliminate noise and so acoustical absorpt…
Coating carbon nanotube surface with ZnO nanoparticles was successfully performed by sol method using Zn(CH3COO)2·2H2O and multi-walled carbon nanotubes (MWCNTs) treated with HNO3 as raw materials. The morphological structure of the as-obtained samples was characterized by XRD, TEM and SEM. Photocatalytic properties o…
The viscosities of the feedstock using for Sialon ceramic injection molding at different temperatures and the rates of shear strain were investigated by capillary rheometer.The rheological property of the feedstock was analyzed.The sensitivity of the viscosity on the rate of shear strain and the temperature was studie…
We report the preparation and optical properties of CdS/ZnS nanocrystals(NCs) are reported.By using the successive ion layer adhesion and reaction(SILAR) technique with few surfactants, we synthesized four samples with different shell thickness, including CdS core NCs and CdS/ZnS core/ shell NCs with 1～3 ZnS monolayer…
Liquid crystalline solutions of cellulose were prepared in a kneader by mixing cellulose and phosphoric acid/poly-phosphoric acid solution. The influence of cellulose concentration,temperature and P2O5 concentration in compound solvent on the solubility and dissolution behavior of cellulose was evaluated. The results…
Firstly,amino-terminated polydimethylsiloxane(NS) was synthesized with hydroxy-terminated polydimethylsiloxane(PDMS) and ammonia alkyl-silane coupling agent(DB-912) as raw materials;secondly,it was used as chain extender for the preparation of waterborne polysiloxaneurethane copolymer(WPSUR).Effect of NS molecular wei…