Materials Literature
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Water-soluble porphyrin,tetra-(p-sulfophenyl)porphyrin(H2TPPS),and its metalloporphyrin complex(FeTPPS and ZnTPPS) were synthesized and characterized. The pH control for the reaction system and the use of dialytic bag can efficiently increase the yield and purity of the product. The structural traits and spectral prop…
The ordered mesoporous carbons(OMC) were synthesized by templating SBA-15 mesoporous silica materials.A novel OMC modefied electrode was prepared by using the chitosan as dispersant.The electrochemical behavior of uric acid(UA) was studied by cyclic voltammetry at this electrode.The result showed that the anodic peak…
Nephrogenic systemic fibrosis(NSF)is a general disease which is characterised with systemic fibrosis,serious cases may cause death.It has been found in recent years that this disease may be related to gadolinium-based contrast agents(GBCAS)for median or late-stage patients with renal insufficiency.This artical reviwed…
Axial ejector mechanism is usually used in precision cold extrusion die for stripping of parts.The resistance is large due to the forming springback of thin walled parts like a concave slide shoe for ball,thus resulting in part deformation or die damage.In order to solve the problem,rotary of cores is arranged to act…
TDI-80 was modified by tri(2-hydroxyethyl) isocyanurate(THEIC) with the reaction of TDI-80 introducing isocyanurate(IS) to the mian chain of PUE(m-PUE).The effect on the mechanical properties and thermal properties of PUE was studied by adjusting the content of THEIC.The test data of mechanical properties showed that…
Weldments of commonly used base metal 16Mn are prepared by single wire submerged arc welding process using alternating/direct current power source and the twin wire submerged arc welding process.For the welded joints obtained by above-mentioned welding processes,the tensile tests of the welded joints are conducted,and…
Mono-dispersive nickel nanoparticles have been prepared by chemical reduction method at the mixture media of distilled water and absolute alcohol using hydrazimum hydroxide as reductant,NiCl2·6H2O as starting material.X-ray diffraction(XRD) results indicate that the as-prepared samples are pure nickel without any othe…
Two complexes,[Cu(L)](1) and [Co(L)(H2O)2]n(2),have been synthesized via the complexation of copper(Ⅱ) acetate monohydrate or cobalt(Ⅱ) acetate tetrahydrate with a new Salen-type bisoxime ligand(H2L,4,4'-dibromo-6,6'-dichloro-2,2'-[ethylenedioxybis(nitrilomethylidyne)]diphenol),respectively.X-ray crystal structure det…
Polystyrene(PS) was pretreated by O2 plasma,then N-vinylpyrrolidone(NVP) was graft-poly-merized on PS surface in the Ar plasma environment. The effect of O2 plasma pretreatment on surface free energy of PS was investigated by means of contact angle(CA) and surface free energy(SE) measurements. As the result,the optimu…
The effects of extrusion speed and ingots of electromagnetic casting on microstructure and mechanical properties of AZ31 magnesium alloy extrusions are investigated.When extrusion speed is lower,grain size of the extrusion decreases and surface quality in extrusion AZ31 magnesium alloy is very good.As a result,the ten…
Digital printing of cashmere fabric was researched,in basis of the process of the digital printing and many problems in the digital printing.The bleeding in the process of the digital printing,the reasons of it were analysed,and the solutions were worked out.According to analysis the filling of the proprocess and para…
On the basis of studing on the present technology of Sulfur Hexafluoride(SF6) leak detection,infrared laser absorption used in detecting the concentration of SF6 is studied and analyzed in this paper.The simulation and experiment has proved that the system has realized the gas leakage detection in the room where the S…
A process of fabricating sub-micro-and micro-pores for drug loading on medical 316L stainless steel was demonstrated.An aluminum thin film was deposited on 316L stainless steel substrate by magnetron sputtering.The aluminum film was then anodized in 0.3 mol/L oxalic acid solution.The morphology of the porous 316L surf…
The effects of BF3-H2O catalyst,THF and EDC solvents on the quantum chemical calculation of the ethylene oxide cationic polymerization were studied,and the mechanism of BF3-H2O catalyzing ring-opening polymerization of ethylene oxide was also investigated.By using density functional theory B3LYP/6-311++(d,p) method,th…
The transparent and heat-insulated nano-dope,which was selective to absorption of sunlight with different spectrum,could be developed and applied widely in structural glasses.It was not only economically affordable,but also power frugal and environment-friendly.It provided energy-saving for structures with a new train…
The influences of the extruder operating conditions such as current,water absorption and melt flow speed are discussed,during the twin-screw extruder of cellulose acetate propionate(CAP).The compatible conditions are as follows:screw rotating speed is 500 r/min,screw temperature is 140,170,170,170,160℃,CAP-based biode…
Triazine-based 5-(4-hydroxyphenyl)-10,15,20-triphenyl cobaltporphyrin was prepared by the nucleophilic substitution of hydroxy porphyrin monomers to cyanuric chloride.They were purified on silica gel using dichloromethane as washing agent.The main spectra of UV,IR spectrum showed that the structure of the target produ…
Many literatures prove Al-Si hypoeutectic phase has certain relationship of crystal orientation,but there are no reports for the crystal orientation of hypereutectic.Taking the relationship of crystal orientation in hypoeuectic phase as reference,in which it is(220)Al∥(111)Si(111)Al∥(011)Si,we investigate the relation…
The researching advances on grain refining of Mg-Al alloys are reviewed. Grain refining methods of Mg-Al alloys include C-inoculation,superheating,anhydrous FeCl3 additions,etc. These methods all have some disadvantages. So new grain-refining methods of Mg-Al alloys have been searched by scholars at home and abroad,an…
A novel epoxy toughening diluent(U669) contaning epoxy terminated polyurethane was synthesized by the reaction of urethane prepolymer and domestic epoxy diluent 669.The blends of epoxy resin(E51) and U669 were cured with acetonitrile-hexane diamine and 593# respectively.The effect of U669 content on the properties of…