Materials Literature
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This study focuses on the conditions of preparation of C/C-SiC composites through polymer infiltration and pyrolysis method using hydrogen-containing polysiloxane as the precursor and divinylbenzene as cross-linking agent. The densities of different C/C composites (ρ=1.02, 1.21, 1.60, 1.78g·cm-3) increased to 1.24, 1.…
A new superparamagnetic material was synthesized by a method involving the use of dimethylolpropionic acid (DMPA) and ferrous powder in N,N-dimethylformamide (DMF) as a solvent in this work. Through the magnetic balance measurements, fourier transform infrared spectrophotometry (FTIR) and so on, it was found that the…
The microstructure and tensile properties at room temperature of as-extruded Mg94.5Zn4Y1Er0.5 alloy sheet were studied. The results show that the alloy is mainly composed of equiaxial-liked α-(Mg) grains and W phase containing lots of rare earth elements (F.C.C. structure, a=0.707nm). The elongation and tensile streng…
The NiP/TiO2 bilayer coatings were prepared on low carbon steel substates using a combined electroless plating and sol-gel method. The performance of photocathodic protection of the bilayer coatings was investigated by the electrochemical method. The results show that the coating with four TiO2 layers and calcined at…
APP-V can be transformed to APP-I and APP-II, and APP-II can also be transformed to APP-V. However, the crystalline transformation process is not well known. By process of diammonium hydrogen phosphate, the intermediate APP-X in between ammonium polyphosphate form II (APP-II) and form V (APP-V) was found and measured.…
A model for grain growth simulation, in the presence of the second phase particles, is established with the help of a Cellular Automata method. The effect of the time when the second phase particles are introduced on grain growth is simulated. The simulation results show that the second phase particles inhibit the gra…
A series of novel liquid crystal were synthesized with alkyloxyben- zimidoylbenzoic acid (CnABOH) and poly(4-binylpridind) (PVP) through hydrogen bond self-assemble between carboxyl groups of alkyloxybenzimidoylbenzoic and nitrogen of PVP. PVP was used as a hydrogen bond acceptor polymer. The CnABOH (n is the number o…
La3+/halogen (F-, Cl- and Br-) co-doped TiO2 was synthesized by alkoxide hydrolysis method. The prepared La3+/halogen TiO2 photocatalysts with anatase phases and rutile phases were characterized with XRD, EDS, TEM and surface area analytic technology. Methyl orange was used as model pollutants to evaluate its visible…
The interaction between 3, 5-dinitrobenzoic acid and bovine serum albumin (BSA) was studied by the method of fluorescence spectroscopy. By the analysis of fluorescence spectra and fluorescence intensity, it was observed that the 3, 5-dinitrobenzoic acid had a strong ability to quench the intrinsic fluorescence of BSA…
In this dissertation, the electric arc spraying coatings on steel structure were sealed over with the organic coatings addition with nano-sized TiO2, SiO2. Some means as light microscope, SEM, energy spectrum and binding force tests were adopted for research the permeability of the sealer. The mechanism for permeable…
Influence of frictional wear characteristics of the cast iron-cast iron friction pair were investigated in the Self-repairing Additive with different concentration by using MMU-5G end-face friction and wear testing machine. The capability of generating self-repair coatings on the cast iron tribo-surface was verified i…
A novel series of Pyridinium salts with rhenium group attached to the alkyl side chain, viz. [CnPy][ ReO4] (where CnPy is the N-alkyl- pyridine cation and Cn=(CH2)n-1CH3, n = 2-6), have been synthesized and characterized. The physicolchemical properties of the ionic liquids have been determined and estimated. The infl…
The treatment of resist water and oil by low-temperature plasma technology for recycled polyethylene terephthalate(PET)fiber automotive interior carpet was studied.The best process conditions were optimized:low-temperature plasma processing power was 150W,vacuum was 30Pa, time was 10 min,perfluorooctylsulfonyl amide(C…
TDI as main isocyanate, IPDI as end-capping reagent, waterborne polyurethane emulsions (WPUs) surface-sizing agent have been obtained. The properties of WPUs and papers sized by WPUs with different DMPA content, different NCO/OH molar ratio and nNCOTDI/nNCOIPDI are systematically examined. The results show that WPUs a…
Shape memory polyurethane (SMPU)/Vapor grown carbon nanofibers (VGCNF) composites with different surface functionalized method were prepared via sol-gel process. The structure and properties of the composites were investigated by scanning electron microscopy (SEM), universal testing machine, and dynamic mechanical ana…
According to the low current efficiency of magnesium sacrificial anode, magnesium sacrificial anode material with gadolinium addition was investigated. The electrochemical properties of the material were measured by constant current method. The microstructure and composition of the anode material were characterized by…
Solid-state Al−Li/NaBH4 mixtures with salts have been fabricated for hydrogen evolution through a milling process, providing uniform dispersion of metals Al, Li and salts among pulverized NaBH4 particles, in order to increase the contacts of NaBH4 with active catalytic sites. The results show that the mixture has good…
Optical reflectometry is applied as a tool for studying single and simultaneous adsorption of a carbohydrate, a nonionic surfactant, and a protein, For the nonionic surfactant poly(ethylene oxide) alkyl ether on a silica surface the adsorption process is fast and reversible, and the maximum adsorbed amount was 2.45 mg…
Thin silicon nitride films were prepared on PET by r.f. reactive sputtering. Deposition Rate, reactive mechanisms, the thickness attribution, chemical stoichiometry and impurity were studied by means of RBS, XPS, and ellipsometer. Results show that chemical stoichiometric films with N-to-Si atomic ratio of 4:3 were ac…
In this article, Pt nanoparticles protected by 1-dodecanethiol (DDT) were self-assembled on iron surface forming mixed self-assembled films. Those nanoparticles were prepared in aqueous solution and transferred from water phase to toluene phase. The self-assembled films of nanoparticles protected by DDT were prepared…