Materials Literature
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The multi-walled carbon nanotubes(MWNTs) were modified by mixed strong acids and sulfuryl dichloride(SOCl2) successively.Their solubility in organic solvents and dispersivity in matrix of polyimides were improved greatly by modification.The unmodified and modified MWNTs were characterized by X-ray photoelectron spectr…
Radiation monitoring system is important for the PWR nuclear power plant,and the research of design methods and principles for the radiation monitoring system can greatly improve the design ability of the system for PWR nuclear power plant,and reduce the risk of system retrofit.According to the Nuclear power plant reg…
Oligomeric intermediates with the degree of oligomers(m) 1.61~5.44 were synthesized from neopentyl glycol and sebacic acid with 95% yield.The complex esters were obtained by esterification of the oligomers with rapeseed acid,and the yield of the complex esters were 90%.Experimental results show that viscosity of the c…
In order to enhance the service life of transformers and its insulation level,synthetic fiber insulation paper has been widely used in the dielectric insulation engineering because of its excellent dielectric,mechanical and thermal stability,moisture resistance and other properties.Injection,accumulation and dissipati…
Enzyme activities of 525 Bacillus strains were detected by Conway diffusion method to screen out Do chi Bacillus stain with high glutaminase activity and enhance glutamic acid content.The results showed that B.subtilis GA317,a Do chi Bacillus stain with glutaminase activity 68.407mg NH3/(g yeasy·h·37℃) which is 5.59 t…
Three kinds of organic thin films transistors(OTFT) with different ratio of channel width to length were fabricated by using copper phthalocyanine and silicon dioxide as the active layer and the insulating layer,respectively,and titanium/aurum as the electrode.The electrical properties of the three devices were compar…
The influences of heat treatment and cold rolling reduction rate on the microstructure and mechanical properties of low carbon Si-Mn TRIP steel were studied by color metallograph method,X-ray diffraction and tensile testing.The results show that for different intercritical annealing temperatures,the volume fraction of…
Superhydrophobic cotton fabric with a contact angle of above 150° has become a hot spot of research in recent years for its potential applications.This paper addressed the factors influencing the wettability of fabrics,research advances in preparation of superhydrophobic cotton fabric,including characterization method…
Nanocrystals of up-conversion phosphor Er3+ and Yb3+ co-doped In2O3 were prepared by solvent thermal method using glycol as solvent.The samples were characterized by X-ray diffraction,transmission electron microscopy,diffuse reflectance spectra,and upconversion luminescence spectra.X-ray diffraction analysis showed th…
Based on Life Cycle Assessment(LCA),with the actual situation of aluminum industry in China in 2008,a quantitative analysis of energy consumption and greenhouse gas emissions caused by aluminum alloy extrusion were carried out,including the primary aluminum production and semi-fabrication stage.Studies have shown that…
Phosphotungstics acid with Dawson structure and characted by FT-IR,UV-Vis and TG-DSC.The catalytic performance in synthesis of n-Butyl acetate with acetic acid and n-butanol was investigated and the mechanism was discussed.The optimized condition were as follows: the mass ratio of the catalyst to total reactant was 0.…
Nanocrystalline diamond films with outstanding performance have been widely used in many fields.But the diamond films deposited by microwave plasma chemical vapor deposition(MPCVD) are usually affected severely by the deposition process.The effect of methane concentration on the quality of diamond films deposited by M…
N-Allylpyridinium chloride ionic liquid(Cl) is synthesized by one-step process.1H-NMR,FT-IR,MS and DSC-TGA analyzers are used to study its chemical structure and thermal stability.The intermiscibility and water absorption of Cl are investigated as well.The results show that Cl ionic liquid is a good solvent for cellul…
The relationship between the ultraviolet(UV) transmission and structure for lithium aluminosilicate glasses is investigated by infrared spectroscopy and X-ray photoelectron spectroscopy.The results show that UV transmission is determined by bridging oxygen bone and non-bridging oxygen bond.In the lithium aluminum sili…
In MFL inspection,as the thickness of the ferromagnetic material to be detected or the buried depth increases,flaws are more and more difficult to be found.In order to search the ultimate,the detectability was studied experimentally on a thick steel plate with blind holes in different depth.Signals under different mag…
Alloy Ni-44Ti-5Al-2Nb-1Mo(atomic fraction,%) is directionally solidified(DS) at a constant temperature(1 550 ℃) in a range of withdrawal rates(0.3,1.2,3.0,6.0,18.0 mm/min) by liquid metal cooling technology.An investigation of the microstructural characteristics indicates that the DS processes do not affect the phase…
Poly(trimethylene terephthalate)(PTT)/poly(butylene terephthalate)(PBT) blend and its ternary systems reinforced by carbon nanotubes(CNTs) were prepared by melt-mixing.The effect of CNTs on the transesterification between PTT and PBT was then studied through nuclear magnetic resonance spectroscopy(NMR).The possible me…
The process of oxidation reactions and solvent extraction for coking diesel with hydrogen peroxide organic acid as an oxidant was studied.The influence of the different oxidation systems,the oxidation temperature,the oxidation time,the volume ratio of oxidants to oil,the different extractants,the extraction temperatur…
V-doped TiO2 films were prepared by sol-gel method starting from tetrabutyl titanate and vanadium(Ⅲ) 2,4-pentanedionate.Their properties were characterized by XRD,UV-Vis absorption spectra,FT-IR,and XPS with the undoped film samples as the control.Both the V-doped and undoped TiO2 films are anatase and the band gap de…
Tungsten-doped indium oxide(In2O3:W,IWO) films were prepared by DC reactive magnetron sputtering.The effects of oxygen partial pressure and sputtering time on surface morphology and photoelectric properties of IWO films were investigated.The result showed that the film surface morphology was closely related with the p…