Materials Literature
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Using sodium silicate as silica sources,trimethylchlorosilane(TMCS) modified SiO2 hydrogels were prepared by a simple sol-gel process.After immersing and aging,surface modification,solvent replacement and fractional drying,mesoporous SiO2 aerogels were obtained via an ambient pressure drying technique.The density,spec…
Tetramethyl biphenyl epoxy resin(TMBP) was synthesized from 3,3′,5,5′-tetramethyl-biphenyl-4,4′-diol and epichlorohydrin via a two-step method using 18-crown-6-ether as a phase-transfer catalyst.The effect of temperature,reaction time,and phase-transfer catalyst on product yield was investigated.It was found that a ma…
Platinum carbon(PtCx) nanostructure was prepared by ion beam deposition,and its electron transport property was studied.The microstructure and composition of PtCx nanostructure were analyzed by SEM and EDX,the nanostructure size analyzed by AFM,and its atomic structure analyzed by HRTEM.The AC measurement was performe…
Metal dusting is a catastrophic corrosion in Fe-based and Ni-based alloys,which occurs in the hydrocarbon atmosphere at high temperature,the process of metal dusting in low alloy steels is discussed in this paper.According to Hochman-Grabke′s mechanism,the improvement of this corrosion can be divided into three phases…
Pipeline construction in particular terrains such as mountain,Gobi,steep slope,narrow ridge,beach,frozen earth,highway and river crossing,the protection of pipeline,especially of the pipeline external anticorrosion coating,faces great technical challenge.This paper introduces a gravel jacket for mechanical protection…
MgO/La2O2CO3 catalyst prepared by the thermal decomposition of the precursors obtained from the coprecipitation method was tested in low-temperature OCM(oxidative coupling of methane).The result showed that such catalyst could ignite the reaction at Tex=460 ℃(external furnace temperature),and hold the reaction for at…
The theoretical result of electron scattered by lithium atom in the rang of 0.1 ～ 20 eV was obtained with the equivalent potential model .Total elastic scattering cross section and differential cross section were calculated and compared with the previous more accurate experiment and other theoretical data.Our work wer…
This article explore ways of strengthening the engine room to solve the problem of some rooms of the load for the relevant projects for reference.
Endothelial microparticles are vesicles of less than 1 μm diameter,shed from endothelial cells in response to activation or apoptosis. They are the markers for the function of endothelium. Studies have shown that endothelial microparticles can exert both beneficial and detrimental effects on inflammatory responses,coa…
Micro-arc oxidation(MAO) is a novel technique,which can in-situ form the ceramic coatings on the surfaces of some non-ferrous metals. The ceramic coatings prepared by MAO show good adhesion with the substrate and excellent mechanical properties. The basic principle of the MAO technique on aluminum alloys is introduced…
RTV/Mg(OH)2 and RTV/Mg(OH)2-Al(OH)3 coating were prepared.The effects of Mg(OH)2 and Mg(OH)2-Al(OH)3 with various doping content on the insulation property of the coatings werestudied.Results show that the dielectric permittivity of the coating increases with the increase ofMg(OH)2 fillers.When the content of Mg(OH)2…
In this paper,by blending silk fibroin(SF) and carboxymethyl chitosan(CMCS),different ratios of SF/CMCS blend membranes were got.The change behaviors of the conformational of CMCS-induced silk fibroin were studied,and the blend membranes’ hygroscopicity,permeability and water retention was tested.When the CMCS content…
SEBS elastmoer(styrene-ethylene/butylene-styrene triblock copolymer)was utilized as a toughening agent for PP.The mechanical properties,morphology and crystal properties of PP/SEBS blends with different content of SEBS were studied by SEM,DSC,melt flow index,notched impact and tensile properties tests.It revealed that…
Using conventional activated sludge as seeding sludge,sodium acetate as carbon source and nutrient ratio of COD ∶ N ∶ P=100 ∶ 5 ∶ 1,the effect of the influent COD concentration on synthesis of polyhydroxyalkanoates(PHA) by activated sludge was investigated in SBR operated in alternative anaerobic/aerobic mode.The resu…
The status and function of Chinese rabbit hair industry in the national economy and foreign trade export were illustrated briefly in this paper.Development trend and influence of rabbit hair manufacture and process in our country was elaborated by the variation of textile market at home and abroad,which also influence…
The flow path of deep desorption system of waste acid by CaCl2 method was introduced.Problems occurred during the recovery of waste acid by this process in Xinjian Tianye(Group) Co.,Ltd.were described as well as the matters needing attention and the technological modifications,and the shortages of this deep desorption…
Combined with the engineering condition,the general failure mode and failure mechanism of coating and cathodic protection system for the oil gas transmission pipeline as well as the axial position in the pipe where coating deteriorates frequently are analyzed.The cathodic shielding and stress corrosion cracking in the…
A chemical oscillating reaction of amino acid-KBrO3-H2SO4-acetone system was studied using glycine as organic substrate and catalyzed by tetraazamacrocyclic nickelThe complex [Cu(bipy)(pc)(H2O)(ClO4)]·H2O(1)(bipy:4,4'-bipyridine;Hpc:α-pyridine carboxylic acid) has been synthesized and characterized by single crystal X…
Organic-inorganic heteropoly compounds(4,4′-bipy)4H4[PMo12O40](CH3COO)·1.5 H2O(1) and(4,4′-Hbipy)2(4,4′-bipy)2H[PW12O40]·3.5H2O(2)(4,4′-bipy = 4,4′-bipyridine) were synthesized based on construction of saturated Keggin polyoxoanions.Resultant heteropoly compounds were analyzed by means of elemental analysis,infrared s…
In Pickering emulsions, the solid particles adsorbed on the interface of oil-water can stabilize emulsion. Pickering emulsions can be prepared through a simple method and it has many advantages, but it hasn' t been used in the papermaking up to now. The research situation of Pickering emulsion' s theory and its applic…