Materials Literature
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Ultrafine poly(e-caprolactone) (PCL) fibers were prepared via electrospinning, fibers were bonded by thermal treatment. Scanning electron microscopy(SEM), X-ray diffraction(XRD), attenuated total reflectance-Fourier transform infrared spectroscopy(ATR-FTIR) and differential scanning calorimeter(DSC) were used to chara…
Surface modification of the cellulose acetate fiber for cigarette filter was performed by wide spacing atmospheric pressure glow discharge plasma(APGDP) was studied.Capillary effect was tested and the morphological change along longitudinal section of the fiber was observed and analyzed by scanning electron microscopy…
Cailiao Baohu 2010,43(10),17 ～ 19(Ch).The colloid of polyvinylpyrrolidone(PVP)/ AgNO3 was coated on the surface of polyimide(PI).Resultant coated colloid was irradiated to generate Ag nanoparticles via laser-induced reduction of silver nitrate.Micron-patterned electroless Cu coating was prepared on laser-irradiated PI…
Based on testing of corroded reinforced concrete beams in different load levels and comparison with three control beams,this paper presents the effects of mechanical loading on the corrosion of reinforcing steel and the steel mass loss rate.Beams specimens were subjected to the sustained load corresponding to stress r…
The influence of different carbonization techniques on microstructure and surface strengthen of titanium sheet and the kinetics analyses of grain growth were investigated in this paper.According to the transition structures,observed under optical microscope,obtained by different heat-treatment temperatures(600 ℃,700 ℃…
Objective To investigate of collagen fibers contents in myocardial of dogs by autologous bone marrow mesenchymal stem cells(BMMSCs)transplantation after acute myocardial infarction.Methods AMI models were established by ligating dogs left anterior descending coronary artery(LAD),and then BMMSCs labeled with Brdu were…
This article is try to explain or analyze the key technologies of controlling the surface quality of low carbon steel as cast strip through investigation of interface heat transfer between solidified shell and liquid steel.The one of the key technologies of controlling surface quality of low carbon steel as cast strip…
To extend area application of it,all kinds of process properties of superfine waxy corn starch particles were studied as compared with the conventional waxy corn starch.The results showed that the solubility,the water-binding capacity,the rate of hydrolysis with enzyme and the gelatin transparencey of waxy corn starch…
The mesoporous molecular sieve Al-MCM-41 is prepared in ammonia water by hydrothermal crystallization,using cetyltrimethyl ammonium bromide(CTABr) as structural template agent,tetraethyl orthosilioate(TOES) as silica source and aluminum chlorhydrexusp(AlCl3·6H2O) as aluminum source.The effects of the ratio of reaction…
The equipment corrosion of oil and gas gathering and transportation system would seriously affect the normal production run.The tank′s corrosion occured all the time,and difficult to be detected.Through further research of oil tank corrosion,produced oil tank corrosion reasons,tank corrosion characteristics of the fac…
Cr~(4+)-doped transparentβ-Zn_2SiO_4 glass-ceramics were prepared by high-temperature melting and subsequent heat-treatment. The absorption spectra confirmed that Cr~(4+) in Cr~(4+)-dopedβ-Zn_2SiO_4 glass-ceramics is located in a weak crystal field.Racah parameters of Cr~(4+)-Zn_2SiO_4 glass-ceramics were estimated,in…
Methylene di-aniline was synthesized and used as core material,for synthesizing six different branched generations of dendritic polymers by means of divergent method.Suitable conditions for synthesis of each branched generation product were found as follows:n(methylene di-aniline)∶n(methyl acrylate)=1∶8,under 35 ℃ for…
Desulfurization performances of MHY30 and MHY40 activated carbon reactivated with steam and modified by H2O2 have been investigated to deprive SO2 of thermal plant flue gas.Analysis was done on the basis of reaction space theory under the condition of desorption by water.Results show that the first adsorption capacity…
Lead-free piezoelectric ceramic SrxBa1-xNb2O6(SBN,x=0.49～0.56)were prepared by the conventional solid state method with SrCO3,BaCO3 and Nb2O5 as raw materials.The effects of the composition and sintering temperature of the SBN ceramic on its phase structure,micromorphology and dielectric properties were studied.The re…
The performances and characteristics between polyurethane(PU) sealant,silicone sealant and PU sealant modified by organosilicon coupler were compared and analysed.The synthesis methods of PU prepolymer modified by organosilicon coupler and the influences of raw materials on the sealant performances were introduced.
The structural and electronic properties of N@ C60,P@ C60 and As@ C60 were investigated with quantum mechanics.Compared with isolated C60,the C60 cage deforms slightly,and the three doped atoms(N,P,As) lie in different positions in the cage.The interactions between the cage and the doped atom mainly cousist of charge…
Rare earth perovskite-type oxide catalyst as a substitute for traditional rare metal catalyst has a great potential to purify automotive emission due to good catalytic activity and low cost.The developing history and current status,the catalytic mechanisms and major preparation technologies of rare earth perovskite-ty…
A recommended treatment process using a deoxidizing/desmutting agent for replacing traditional nitric acid-hydrofluoric acid pickling is used to treat the surface of cast aluminum alloys. A comparison was made between the recommended process and traditional and simpler processes. The results showed that the new proces…
The flow behaviors of Ti-xNb-0.7Ta-2Zr-1.4O(x=22.4,22.85,24.5) alloys during room-temperature compression were investigated.The results show that the true stress—strain curve exhibits stress oscillation phenomenon characterized by alternate strain hardening and softening,which is caused by a change in the dominant def…
A cDNA clone encoding a novel cystatin,Cysteine Proteinase Inhibitor(CPI),was isolated from a normalized cDNA library constructed from upland cotton of a gland mutant Xiangmian-18.The cDNA insert comprises 378 bp and encodes 125 amino acid residues that contain the conserved motif of cysteine protease inhibitors belon…