Materials Literature
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Stacrh/NaAA/CR water-absorbent composites were prepared by blending polychloroprene with starch,NaAA and vulcanizing agents.The effects of the different swelling mediums on mechanical properties and water absorbent properties of stacrh/NaAA/CR water-absorbent composites were investigated in deionized water and NaCl so…
Ni/CCA catalysts with different Ni loading were prepared by impregnation method used carbon-covered alumina(CCA) as support.The samples were characterized by N2 physisorption,X-ray diffraction,Ultraviolet-vi-sible diffuse reflectance spectroscopy,H2 temperature-programmed reduction,H2 temperature-programmed desorption…
PVA/FeCl3/Co(CH3COO)2 composite nanofibers were synthesized by using sol-gel processing combination with electrospinning technology,where polyacrylonitrile and manganese acetate were used as precursors.After high temperature calcination,CoFe2O4 nanofibers were successful prepared.The samples were characterized by scan…
The history of piezoelectric polymer is reviewed and the mechanism of piezoelectricity is discussed.The development of piezoelectricity in aliphatic polyamide is summarized detailedly.The piezoelectricity of aromatic polyamide and laminated film are discussed.Finally the research fields are pointed out.
A facile method to selectively synthesize nano-scaled Gd2O3 with different morphology has been developed in our report.The products can be prepared by a two-step hydrothermal process via homogeneous generation of hydroxide ions through the hydrolysis of urea and further heat treatment,the formation of different morpho…
The research situation,the technical characteristics and the latest progress of at home and abroad were summarized.The research direction of heterogeneous catalyst for hydroformylation reaction was pointed out.
Coarse-grain tungsten carbide(WC) composite was produced by the technology of consutrode D.C.arc in-situ metallurgy.The microstructure and phases of the composite was investigated by XRD,SEM,EDS.The results show that W atoms diffuse in the C-rich overheating liquid phase and then WpC(WC,W2C) granules are in-situ synth…
The nanocrystal silicon films were prepared by pulsed laser ablating with a high resistivity single crystalline Si target at the ambient pressure of 0.3 Pa of pure argon gas.A bunch of argon gas flow was introduced at 0.35 cm above the ablation point with the axial range of 0.7 cm.Nanocrystal Si films were deposited o…
Objective To study the effects of two main cephalosporin antibiotics(cephalexin and cefradine) on Tetrahymena thermophila at the environmental relevant concentration through testing the changes of the activities of superoxide dismutase(SOD) and lactic dehydrogenase(LDH).Methods Tetrahymena thermophila,which were in a…
The research studied the optimum preparation condition of chitosan immobilization microspheres support,and provided theoretical foundation for the further its immobilization on lactase.The chitosan microsphere was prepared by condensation/precipitation.The results showed that 2g/mL chitosan(1% ice acid solution) was d…
Hafnium oxide(HfO2) anti-reflection and protective films were prepared on surface of CVD ZnS by RF magnetron sputtering process.The structure and properties of HfO2 films were examined by XRD,SEM,AFM,FTIR and nano-indentation tests.The results indicate that the structure of HfO2 films are monoclinic phase and the film…
For large press roller end joint special structure—great X mode 8° conical body processing difficulty,through designing unique manufacturing process and NC program,the machining of the roller end joint was ensured to be successful.The design of the special tool also has originality.
Using plasma treatment technology combined with alkali deweighting of polyester fabric surface treatment,the polyaniline/polyester composite fabric was prepared by in-situ chemical oxidative polymerization.Influence of low temperature plasma treatment power,vacuum degree and time on polyaniline/polyester composite con…
The corrosion behavior under the rust layers was the most important and longest of the corrosion morphology.Several influencing factors,such as the complexity of the process,rust layer components,pH values,Cl-concentrations and temperature,on corrosion behavior of steels under the rust layers were reviewed.
Gold nanorods with multiple aspect ratios were prepared using seeded growth method.The refractive index sensitivity of nanorods was studied by monitoring the shift of localized surface plasmon resonance peak when the surrounding refractive index was changed.The experiment results show that sensitivity increases almost…
With the traditional cast penetrating technology,high cast chromium iron composite layer was formed on the surface of the guide plate ZG35.The microstructure of the cast layer with different contents of the nanometer TiN was researched by means of SEM,XRD and TEM.The results show that the cast layer is composed of the…
Ship hatch is a hatch opened the key components on wheels,depending on the area of ship service,the wheels must meet the strength,low temperature impact,extending the surface hardness requirements.QT700-2 thick large-scale,high-grade ductile iron products in the domestic use of the occasion and rare.With the shipbuild…
Chloromethylated polyethersulfone(CMPES) was successfully synthesized by chloromethyl octyl ether(CMOE) as the chloromethylation reagent.Subsequently,CMPES membranes were quaternized by trimethylamine aqueous solution to form quaternized PES hydroxide(QAPESOH) membranes.QAPESOH membranes of degree of chloromethylation…
Based on sulfur nature cycle,respectively introduces the principle of microbial desulfurization on industrial gas containing H2S、SO2,analysed the typical process and microbial desulfurization key factors,development direction of this technology was proposed,it has certain directive significance on microorganisms in in…
The kinematic control of guide rollers was a key and difficult point in special-section chemical flange rolling process.Based on the volume invariant principle,the guide rollers' locus was calculated by mathematical software MATLAB,then the data was imported to ABAQUS simulation software,and the radial ring rolling pr…