Materials Literature
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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…
Formulation and technology of low-density concentrated laundry powder by tower process were studied.In the experiment,it was found that the slurry viscosity was increased by sodium alkylbenzene sulfonate,sodium tripolyphosphate,4A zeolite,sodium carboxymethyl cellulose and sodium para toluene sulfonate,and decreased b…
Effects of the extrapolation length on the phase transformation of epitaxial ferroelectric BaTiO3 thin films on dissimilar cubic substrates have been studied on the basis of the mean-field Landau-Devonshire thermodynamic theory by taking an uneven distribution of the interior stress with thickness into account.It has…
Lanthanum nitrate was used to replace chromate for passivation of galvanized steel. The corrosion resistance of resultant lanthanum conversion coatings was evaluated by using neutral salt-spray tests. The effects of bath composition , temperature and time on the corrosion resistance of the conversion coatings were inv…
In cooperation with Nantong Huayan Grinding Research Center,the tooth pattan and material of double plate refiner were studied and optimized to lower beating power consumption and improve pulp quality.
A novel palladium(Ⅱ) complex [Pd(H2bpdc)Ala]Cl·3H2O (where H2bpdc is 2,2′-bipyridine-3,3′-dicar- boxylic acid and Ala is L-alanine) has been synthesized and characterized by IR spectra and elemental analysis. The crystal structure of the complex has been determined by single-crystal X-ray diffraction analysis. It crys…
Not only the design of anti-corrosion longevity of anti-corrosion coating used in friction surface of steel truss bridge bars should be ensured to meet the requirements of appearance,thickness and adhesion of general anti-corrosion coating of steel structure,but also the anti-corrosion coating should bear strong anti-…
Fluorouracil-loaded chitosan microspheres were prepared by one-step solidification technique with chitosan as drug carrier,glutaraldehyde as crosslinking agent.The preparation was optimized by single factor test with the appearance and encapsulation efficiency as the indexes.The effects of crosslinking agent concentra…
The nonionic reactive surfactant was prepared with monododecyl maleate and mono-polyglycol acrylate.Monododecyl maleate was synthesized by using maleic anhydride and fatty alcohol,while mono-polyglycol acrylate was produced using poly(ethylene oxide) and crylic acid.The structure of reactive surfactant was confirmed b…
The chitosan-vitamin C complex was synthesized through the electrostatic attractions among ions. The structure of complex was characterized by FT-IR and DSC. The results of solubility testing show the complex was water soluble. The testing results of auto-oxidation rates of pyrogallic acid indicate the complex was sup…
The title compound(C12H10O4N4,3)was synthesized by the reaction of 5-methyl-4-isoxazole formyl hydrazine with 3-nitro-salicylaldehyde in ethanol,its structure and the physiochemical properties were characterized by 1 [KG6]H NMR,thermogravimetric analysis,UV-Vis spectrum,and density functional theory(DFT).The single cr…
Gray cast iron matrix composites reinforced by tungsten wires were researched on as-cast and heat treatment conditions. The morphology and properties of the composites were observed and investigated by means of SEM, XRD, EDS, micro-hardness test and pin-on-disc wear tester in dry air. The results indicate that, tungst…
Cross-linked enzyme aggregates( CLEAs) is a non-carrier immobilization technique with the advantages of simple preparation,low cost and high unit activity. In this paper,papain-CLEAs were prepared and the effects of precipitation and cross-linking on CLEAs activity were investigated. It is shown that the highest activ…
Nine compounds were designed based on Benzo[1,2,-b:4,5-b′e]dithiophene(abbreviated as BDT) and oligothiophene as building blocks theoretically.Electronic and opticalproperties were comparatively studied by using DFT/PBE1PBE/6-31G(d) based on the optimized geometries at the same level.Calculated results suggest that th…
This paper is studies the effect of the neodymium on the microstructure and mechanics performance of the Mg-Al alloys.The alloys were smelted by the vacuum furnace.the results of microstructure and XRD showed: the grains will be refined and the Al3Nd which has a higher thermal stability will be generate in the alloys…
The energy-dispersive X-ray fluorescence spectrometry method(EDXRF) is applied for quantitative analysis of the gold ion mass concentration in plating solution.The prepartion method of standard sample and analysis method of plating solution are introduced,and the analysis results are compared with chemical analysis me…
The crystallized mesoporous metal oxides have the superior catalytic,optical,electrical,magnetical and mechanical performance and widely application range than their amorphism. The crystallization is one of the most important topics of synthesis of mesoporous materials. This paper began with a brief review of the prep…
A series of Co doped ZnO thin films Zn1-xCoxO(x=3%,6%,8%) were deposited on Al2O3(0001) substrates at room temperature by magnetron sputtering technique and subsequently coupled with the post-annealing treatment for half an hour at 500 ℃ under vacuum.A systematic study was done on the structural,optical and magnetic p…
Interfacial diffusion reaction and structure of Mg-Al diffusion dissolution layer at interface of AZ31B/Al joints prepared by electric field-activated diffusion bonding(EFADB)process using aluminum powder and aluminium foil as intermediate layer, respectively, were investigated. The microstructure, phases and componen…