Materials Literature
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After a brief review of existing methods for fabric wetting and wicking measurement,a new numerical approach based on dynamic image acquisition and analysis was proposed to study the liquid wetting and wicking properties of woven fabrics.A measuring system was first developed to record on-site the images of liquid asc…
Because carbon black/polyurethane conductive fiber produced by wet spinning has lower fracture strength and initial modulus ratio,it is treated by cross-linking agent ethylenediamine which is low poison and high effeciency.The results show that:ethylenediamine can make polyurethane/carbon black conductive fibers in th…
Eudragit L-100, a reversibly soluble-insoluble polymer, was used for the simultaneous immobilization of cellulase and xylanase from Trichoderma reesei. First, the effect of pH on the enzyme activity and the reversible solubility of carrier were studied. Then, the effects of carrier concentration and cross-linker (1-(3…
A series of α-methyl-α-cycloalkyl- and α-cycloalkyl-para-substituted acetophenones have been synthesized. These compounds were found to react photochemically in the solid state to give cyclization and cleavage products as expected for a Norrish Type II reaction. It has been found that α-methyl substitution of α-cycloa…
Huanghua pear fruit was immersed chitosan solutions (CTS) at a concentration of 0%,0.5%,1.0%,1.5% or 2.0% for 1 min to form a coating and then stored at room temperature for 16 days.Compared with the control,the 4 CTS treatments decreased weight loss and fruit rot,maintained a relatively high TSS (total solid substanc…
The reasonable production techniques of 8011-H18 PTP foil substrate have been founded after the measurement and analysis of the mechanical properties,rupture strength,surface tension and pinhole degrees of samples made with four different production techniques like tensile test,punch test,the surface tension testing a…
An alkali-soluble photosensitive oligomer (APSUA) containing Si was synthesized through a two-step synthesis with epoxy resin N,N,N′,N′-tetraglycidyl-4,4′- diamino diphenyl methane (AG-80),acrylic acid(AA),hydrooxypolydimethylsiloxane,isophorone diisocyanate (IPDI) and dimethylol propionic acid (DMPA) and 2-hydroxyeth…
With asbestos tailings as raw materials,conditions of the preparation of light magnesium oxide were chosen as follows: size of mineral particle was 80mesh with sulfuric acid leaching;acid amount was 120% of the theoretical value;liquid-solid ratio was 4∶1;the reaction temperature was 95±2 ℃;reacting time was 1 h;separ…
Samples suffer from X-ray radiation damage during the protein crystal diffraction data collection process.Radiation damage disrupts covalent bonds in molecules,causing breakage and delocalization of disulphide bonds,even disrupting the lattice structure,and is one of the major reasons for errors occurring during the c…
Three-dimensional framework copper(Ⅰ) coordination polymer with cuprous chloride,and 3-(pyridin-2- yl)-1,2,4-triazole,has been hydrothermally synthesized.Crystal data for this complex:Monoclinic,space group P2_1/n, a=1.2033(2) nm,b=1.289 1(3) nm,c=1.5823(3) nm,V=2.338(8) nm~3,D_c=1.779 g·cm~(-3),Z=4,F(000)=1 248.GooF…
Dense fine grained alumina ceramics were prepared by the combustion reaction plus pressing method.The microstructure changes of the ceramics,as well as their densification and grain size changes at a fast heating rate,were examined by transmission electron microscopy and field emission scanning electron microscopy.The…
The fast and deep case plasma nitriding technique is applied to gear of centrifugal compressor.The nitriding layer is investigated by using optical microscope,X-ray diffractometer,electron probe micro analyzer,knoop micro-hardness tester,micro-friction wear tester and scanning electron microscopy.The thicknesses of th…
Nickel dimethylglyoximate precipitate was synthesized with alkaline dimethylglyoxime and nickel chloride solutions under ultrasonication. The prepared product was characterized by XRD,FT-IR,FE-SEM and TG. The results indicate that as-prepared product is rod-like nickel dimethylglyoximate nanocrystals. Its diameter ran…
With MFRMS system,aluminium oxide thin films were deposited on glass substrates at room temperature under different oxygen pressure ratios(5%-11%).The evolution of Al2p core level and oxygen concentration in the films was studied by XPS spectra.The relationship between the structure and oxygen partial pressure was stu…
Three poly(p-phenyleneethynylene, PPE) derivatives containing pentiptycene group were synthesized through sonogashira coupling reaction. They were PPE-A with symmetrical substitutes, PPE-B with symmetrical alkoxyl substitutes and PPE-C with alkyl substitutes. PPEs were characterized by 1H NMR and FT-IR, UV-Vis and PL.…
Objective:To evaluate the effects of micro-arc oxidation (MAO) and poly-L-lactic acid (PLLA) surface-modification on the biocompatibility of magnesium alloy WE42. Methods:Micro-arc oxidation surface-modificated WE42 (MAO/WE42) materials and MAO+PLLA surface-modificated WE42 (MAO+PLLA/WE42) materials were prepared. The…
The effects of solution treatment on microstructures and properties of the aged 1933 aluminum alloy forgings were investigate by optical microscopy (OM),scanning electron microscopy (SEM),transmission electrical microscopy (TEM),X-ray diffractometry and tensile testing.The results show that the recrystallization fract…
The reason of surface imperfection,which appeared in the production of investment casting for monocrystalline hollow blades used in the advanced aeroengine,have been investigated in this paper. The imperfection of local laminayion and cleavage within ceramic shell mould has been effectively inhibited by modulating the…
The recent progresses of codoped TiO_2 photocatalyst are reviewed.These newest researches on the double metal elements co-doping,double nonmetal elements co-doping,metal and nonmetal element co-doping and more than two elements co-doping of nano TiO_2 photocatalysts are introduced.The mechanism of synergy of codoped T…
2,2'-Dibenzamido diphenyl disulfide(pepton-22)was prepared from aniline and sodium thiocyanate by the additional reaction,hydrolysis reaction,oxidation reaction and acylation reaction.The effect of reaction time,solvent and dropping velocity of sulfuric acid on the reaction was investigated.The structure of the interm…