Materials Literature
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Growth factors with sustained release have been introduced into scaffolds to simulate the structure and function of extracellular matrix.Collagen sponge integrated with bFGF-loaded PLGA microspheres has been prepared and its sustained-release performance for bFGF in vitro is studied.The bFGF-loaded PLGA microspheres w…
This paper investigated the hydrothermal formation of hemi-hydrate calcium sulfate whiskers(CaSO_4·0.5H_2O),using CaCl_2 and Na_2SO_4 as the raw materials.The influences of the precipitation of dihydrate calcium sulfate(CaSO_4·2H_2O) precursor and the hydrothermal conditions on the morphology of the hydrothermal produ…
The structure of phosphate - carbamate starch synthesized with urea,NaH_2PO_4 and com starch was detected by FTIR spectrum with the properties including pasted temperature,freeze - melt stability,transparence,viscosity and viscosity thermal stability systematically studied.The result shows that the product has been pa…
The influence of thermal shock on the mechanical properties and micro-structural of 6YSZ,(6Y-Mg) -ZrO_2 ceramics and 6YSZ-MgAl_2O_4 composites is investigated.By characterization of the phase and structure through XRD and SEM,the mechanism that mutability of 6YSZ ceramic fracture characteristics after thermal shock tr…
It is difficult to get even dying effect on silk habotai tie-dyeing especially for geometrical pattern because of the tight construction of silk habotai.And it is hard to get the reproducibility for same color and same pattern due to the same reason.How to choose the dyestuffs,chemicals and auxiliaries,how to get good…
In this study,the dietary fiber were extracted and purified from sweet potato starch residues of Anhui,Beijing Miyun and our laboratory by sieving and enzymolysis method,and its composition and physico-chemical properties were investigated.The results showed that the dietary fiber extracted from Anhui's residue had a…
Differential scanning calorimetry(DSC),microstructure observation,tensile test at room temperature and transmission electron microscopy(TEM) were used to study the microstructure,Portevin-Le Chatelier(PLC) effect and mechanical properties under different strain rates for 5A01(6.13wt%Mg) aluminum alloy.The results show…
A TC4-DT titanium alloy was first subjected to different solution treatment and then effect of electron beam welding on the microstructure of welded joint was investigated.The results show that a duplex structure of primary α-phase and β-phase transformed structure is formed in the alloy solution-treated at 960 ℃ unde…
The production process of wear-resistant low-alloy steel for ball mill liner was described,its chemical composition,microstructure and heat treatment processes were discussed.The results show that selectting rational chemical composition,appropriate heat treatment process can obtain the liner material with high streng…
The blast shock wave pressure and the bubble pulse period of RS211,HL-1,HL-2 and TNT explosives were measured,and then the peak pressure,shock wave impulse,shock wave energy and bubble energy were obtained.The experimental results showed that in the studied range,the shock wave energies and the bubble energies of the…
On the simulation model whose validity is verified,enactments of the friction coefficient scope and friction area of the braking shoes are simulated and analyzed by using thermo-mechanical coupling method and applying MARC software.The results show:the maximal temperature of the wheel and the brake distance aren't inf…
The interaction between an electron and confined-Longitudinal-Optical phonons in a wurtzite(zinc-blende) GaN/AlN quantum well is studied by using the Lee-Low-Pines(LLP) variational method.The ground-state energy,first excited-state energy and the transition energy of the free polaron in wurtzite material QW are calcul…
In core protection construction,the main screening function of core protection at reactor operation process is ensured through setting and design of taxoite ophiolite concrete and the control of heating and pouring.
Tungsten oxide powders with different morphologies were prepared by precipitation method and sol-gel method.And the Tungsten oxide-organic electrochromic films were prepared.The powders and films were characterized by XRD and SEM.The results show that the Tungsten oxide particles prepared by precipitation method are f…
Chemical etching treatment of AAO template is important for the further application of AAO template.The chemical etching is carried out by immersing AAO template in 1:9(V/V,about 15wt%) H3PO4 solution and 10wt% NaOH solution respectively.The results demonstrate that the pores of AAO template are widened firstly,and th…
Using magnesium chloride midde product by a titanium smelting factory as raw material,this paper carries on the research about preparing magnesium hydroxide by ammonia process,better process conditions were found by single-factor experiment and orthogonal test,magnesium hydroxide product conforms to standards of HG/T3…
To analyze the impulse discharge characteristics of porcelain long rod insulators of transmission line,the porcelain long rod insulators string,of which the string length ranged from 2units to 5units(dry-arc distance 2.9 to 7.25m)for both single-string and double-string insulators,was tested under switching and lightn…
In this paper,recent progress of the friction reducing and wear resisting property of polymer-based nanocomposites has been reviewed in the filler perspective.It mainly introduces the progress of the nano-fillers often used in friction reducing and wear resisting situation.And it analyses the friction reducing and wea…
Polycrystalline Ga-doped ZnO(Ga:ZnO)thin films are deposited on quartz glass sub-strates at room temperature by using radio frequency magnetron sputtering.The correlation between the growth conditions and Ga:ZnO film properties is studied through modulation of sputtering power density and target-to-substrate distance.…
The latest progress in properties research on thermoset/ montmorillonite nanocomposite which include unsaturated polyester,phenolic resin,epoxy is summarized up in this paper.The properties include mechanical properties,mechanical properties.Strengthened and toughened mechanisms about thermoset/montmorillonite nanocom…