Materials Literature
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Basic principles of the selective catalytic reduction(SCR)of NOx by NH3 were introduced.In order to develop SCR catalysts used in diesel,the disadvantages and advantages of TiO2 and zeolite catalysts as well as problems and corresponding measures with respect to NOx abatement from diesel by TiO2 and zeolite catalysts…
A styrene acrylate soap-free copolymeric emulsion was prepared and was used as emulsif ier of alkenyl succinic anhydride(ASA) in the preparation of reactive ASA neutral sizing. It is simple in preparation, easy to disperse and has good emulsion stability. Using the waste paper board as pulp and adding aluminum sulfate…
The thesis discourses flame-retardant mechanism of polyester and introduces various type of flame-retardant agent,narrates the current situation of flame-retardant polyester as well as analysing the developing trend of flame-retardant agent of polyester.
In this paper,by taking the fused magnesia,fused magnesium aluminate spinel and fused spinel with TiO2 as raw materials,we studied the effect of adding 15% magnesium aluminate spinel or spinel with TiO2 on the performance of magnesia material respectively.The results indicate that after adding 15% magnesium aluminate…
Using reactive radio-frequency magnetron sputtering,ZnO films were deposited on Si(001) substrates with plused negative bias.The atomic force microscopy was used to study the morphological evolution of ZnO films.The nucleation and growth behavior of the films are quantitatively characterized with the dynamic scaling t…
The amino acid contents of the enzymatic hydrolysates of the fish scale collagen treated by papain, alcalase, flavorzyme and trypsin were measured. The result showed that the peptide yields of the different enzymatic hydrolysates were different. The peptide yields of the products treated by papain and alcalase were hi…
In order to attain the amount of crystal modifier in synthesis of nitrophenol potassium salts,the grained KPA was synthesized with the nonionic surfactant that containing H in the functional group served as crystal modifier.The surface tension and data of the surfactant,which will provide theoretical support for the d…
The fixed-bed reactor was used as the device where m-toluidine was prepared from m-nitrotoluene by gas phase catalytic hydrogenation using home-made Cu-SiO2 catalyst.The effects of different contents of copper and supports,such as Ni,Co and Cr in Cu/SiO2 catalyst were studied.The optimum catalyst system was composed o…
Reduced iron powder and atomized iron powder were used as the magnetic phase,corundum powder as the abrasive,high temperature inorganic binder as the adhesive,the iron powder was modified,four different Fe-Al2O3 magnetic abrasives were prepared by sintering method.X-ray diffraction and SEM were used to anayze the morp…
Nanoscale titanium dioxide(TiO_2) functional films were prepared on the surface of nonwoven polyester fabric at room temperature by DC reactive magnetron sputtering process.The surface morphology and the compositional properties of TiO_2 films were characterized by atomic force microscope(AFM) and X-ray photoelectron…
Ultra-high modulus polyethylene(UHMPE)fibers immersed in 3% acetic acid,3% ammonia and 10 g/L sodium hydroxide respectively for 24 h followed by drying for 12 h in chamber where desiccants were put in,then were treated by atmospheric pressure plasma jet(APPJ).The results showed that atmospheric plasma treatment contri…
In this paper,a primary study on fatigue performance of strengthening RC beams by using prestressed aramid fiber reinforced polymer(AFRP)sheets with permanent anchor was carried out.Based upon the experimental study of four specimens,the beams strengthened with prestressed AFRP sheets were compared with the beams stre…
The basic magnesium chloride nanorods were used as a precursor to synthesize the magnesium hydroxide nanorods with a diameter range of 100~150nm and average length of 3~5μm through precipitation conversion method,the drying curve and drying speed rate curve of magnesium hydroxide nanorods under 80~160℃ were derived th…
With utilizing SHS reaction flame spraying technology and introducing Al-CuO thermite to the spraying materials,Al2O3-based multiphase ceramic coatings on AZ91D are prepared.Results indicate that the thermal-shock resistance of reaction spraying coatings is better than that of common ones.Their thermal-shock times can…
As a potentially universal kinetics model,the applicability of Master Curve Model(MCM) on thermal decomposition of microcrystalline calcite particles was investigated in this study.A sigmoidal master curve was successfully derived from TGA data by MCM.The activation energies of the thermal decomposition reactions were…
A systematic characterization of single-walled carbon nanotubes (SWCNTs) after successive purification steps,including air oxidation at 350℃,hydrochloric acid etching and 600℃ annealing in Ar,have been performed combining X-ray absorption near-edge structure (XANES) and X-ray photoelectron spectroscopy (XPS).The resul…
With thermoplastic elastomer(SBS)as compatibilizer,SBS/polystyrene(PS)blend was prepared by pressure-induced flow processing(PIFP).Macro-properties and micro-morphology of polystyrene obtained by PIFP were studied.SEM images showed that micro-sheet structure could be formed via this process.And mechanical properties o…
In order to study apparel pressure comfort,the female elastic stockings as the experimental materials are chose,the combination of objective and subjective test methods is adopted to study the pressure comfort of elastic stockings.In the subjective test,the quantitative evaluation is carried out for evaluate the sever…
Alumina silicate fibres/TCP biological functionally gradient material(FGM) was fabricated by hot pressing technique.X-ray diffraction analysis,SEM,EDAX linear scanning analysis,density and hardness test were adopted to carry out the research of the FGM.The results show that fibre contents distribution changes symmetri…
Zn–0.05%Ni–V alloy coatings were hot-dip galvanized on the steel containing 0.09% Si by adding a small amount of V to a Zn–0.05%Ni bath. The effect of V content on microstructure of the coatings was studied. The resistance of the pure Zn, Zn–0.05%Ni, and Zn–0.05%Ni–V coatings to corrosion and oxidation was studied by…