Materials Literature
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The state and reactivity of surface oxygen species of mesoporous silica-supported vanadium oxide catalysts for oxidative dehydrogenation of propane have been investigated by microreactor tests combined with in-situ electron spin resonance, temperature-programmed surface reaction, and ultraviolet-visible diffuse reflec…
In this study,silk was modified with cation compounds and dyed with four reactive dyes.The result showed that the rate of fastness on cation-modified silk was 96.60% for the reactive brilliant red dye X-BR100%,99.86% for the reactive brilliant blue dye X-BR140%,97.00% for the reactive brilliant orange dye K-R100%,and…
It is discussed that the influence of salt deliquescent on the aluminum corrosion.The deliquescent behaviors of NaCl,(NH4)2SO4,Na2SO4 and NH4Cl were studied on the surface of plated gold in situ with quartz crystal microbalance(QCM) in the cleaned atmosphere at 25±1 ℃ and 80%±2% relative humidity(RH).Then,the atmosphe…
The phosphors Zn1-xMo1-ySiyO4∶Eu3+x(0.05≤x≤0.30,0≤y≤0.09) were prepared by solid state reaction technique at 800 ℃. The powder X-ray diffraction patterns of the samples show that the phosphors are of single phase and the doping Eu ion and Si ion have little influence on the host structure. The effects of flux and calc…
ZrW2O8 thin films were deposited on quartz substrates by pulsed laser deposition using a ZrW2O8 ceramic target and with subsequent annealing.The microstructure,chemical composition and morphology of the ZrW2O8 thin films were observed and determined by X-ray diffraction,X-ray photoelectron spectroscopy and scanning el…
The basic application properties of QUIMIDERM NP-2(NP-2) have been studied in comparison with DERMAFINISH LUB(LUB) using sheepskin wet blue leather.The results showed that NP-2 owned excellent stability of emulsion,resistance to acid,chrome salt and waxberry extract,etc.And the physical properties of the fatliquored l…
The characteristics of the amorphous alloy catalysts and the effects of supports and addition of metals or rare earth metals on their thermal stability and catalytic properties were reviewed.The sulfur poisoning mechanisms for amorphous nickel-based alloy catalyst and the effects of supports and addition of metals or…
Fabric fault of warp direction is one of major fabric faults in water-jet weaving.The causes and their prevention of some common fabric faults as ends breaking,slack and tight ends,nap warp,warp streak and reediness are introduced.
The surface covalent grafting of multiwalled carbon nanotubes with poly(ethylene terephthalate)(PET) by poly(acryloyl chloride) interlayer was prepared by two step method.The multiple acryloyl chloride groups generated on the surface of poly(acryloyl chloride) grafted MWCNTs were reacted with the hydroxyl groups of PE…
The glasses of SiO2-B2O3-R2O system with different oxide content were prepared by traditional method.The glass density,glass refractive index and the alkali resistance were investigated.The results show that the density,refractive index and alkali resistance of glasses increase with the increase of SrO content.Additio…
The influences of length and distribution of glass fiber and the influence of dispersed lubricant on properties of the reinforced PA66 composites for thermal barrier strip were analyzed and studied.The results showed that: the even-distributed glass fiber whose length was 0.75mm was conducive to extrusion of thermal b…
2-hydrazino-benzothiazole was synthesized by the benzothiazole and hydrazine hydrate and 6-bromo-2-hydrazino-benzothiazole was synthesized by brom(o)-. 0-[(6 bromo-2-benzothiazole hydrazono) methyl] phenol was also synthesized by 6-bromo-2-hydrazino-benzothiazole and salicylide .the different modified benzothiazole al…
Aiming at complex Automatic Flatness Control (AFC) system of Hi-Tech Cold Strip Rolling Mill which equipped with more than four kinds of actuators which participated in closed-loop feedback control of flatness (including Reduction Tilt and Segments Spray Cooling),the general expression of the AFC mathematical model wa…
A series of Cr-Ce catalysts was prepared by impregnation method.The effect of the loading of active component Cr2O3、CeO2,reaction temperature and molar ratio of reaction gas on the reaction was investigated.The catalysts were characterized with XRD techniques.Experimental results indicated that Cr2O3 was the favorable…
The corrosion behavior of 7A04 aluminum alloy deposited with NaCl in several simulated environments ((25±2) ℃ and relative humidity (RH) (95±5)%) was investigated by mass gain method, Fourier transform infrared spectroscope, scanning electron microscopy and X-ray diffractometry. The corrosion mechanism for aluminum al…
The processing of thermoplastic starch is briefly described.Research works on modifying thermoplastic starch materials to enhance the water resistance and lower humidity sensitivity are summarized.Blending with biodegradable polymers,cross-linking treatment and surface modification are the main methods used currently.…
Al2O3 porous ceramics was prepared with ethyl cellulose as pore-forming agent. Effect of process parameters on properties of Al2O3 porous ceramics was discussed. The result shows that pore-forming agent content, ball milling time and agglomeration temperature have effects on porosity and folding strength. The rise of…
This article analyzes the actuality of retrieving and reuse of SMW and lots of important problems which embarrassing the development of retrieving and reuse of SMW seriously.Some suggestions about how to promote the retrieving and reuse of SMW in practice are presented based on these problems.
The cationic starch sizing agent was synthesized using corn starch as raw material and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride as cationic etherification agent,and the properties of glue size(including viscosity and viscosity stability,adhesiveness,its miscibility with PVA and the property of size film) a…
A imine resin systems adhesive with low cost and high temperature resistance was synthesized. So the antistatic and high temperature resistance composites laminated board without empty holes in surface and inner was prepared when mass fraction of prepreg resin was 40%,mass fraction of conductive carbon black was 1.105…