Materials Literature
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Dispersion strengthened tungsten with nano-tantalum carbide(TaC) was prepared by spark plasma sintering(SPS) and then the thermal shock experiment was carried out under condition of bulk tungsten heated at 800℃ for 5 min and argon filled at room temperature for 10 min.The effects of the number of thermal shock and the…
Objective To develope a simplified and rapid method for the synthesis of CMC-CdTe quantum dots(QDs) by microwave irradiation and using modified QDs for imaging live cells.Methods Several synthesis parameters,such as molar ratio of reagents,pH,reaction temperature,and reaction time were studied in details.Under the opt…
A series of perovskite catalysts,LaCo1-xFexO3(x=0,0.2,0.4,0.5,0.6,0.8,1.0) were prepared by co-precipitation method for methane combustion.The structure and properties of these samples were characterized by XRD,BET,SEM,DSC-TG,TPR and methane catalytic combustion.Effect of Fe substituting Co on the structure and methan…
With a concentration fiber reinforced of 0.8wt% and 1.0wt% of KH550 silane coupling agent treated basalt fiber cloth respectively,and made it into basalt fiber reinforced epoxy resin(BFR-Epoxy).According to the FTIR test results,Basalt fiber reinforced epoxy resin,the C-OR bond were formed between the fiber and resin,…
ZnFeⅢ-hydrotalcite-like-compounds(ZnFeⅢHTLcs) were synthesized from ZnSO4 and FeSO4by two-step method,i.e.co-precipitation and subsequent oxidation by H2O2.The influence of the parameters such as ratio of materials,pH value and the oxidation condition,was discussed.Characterization of samples was carried out by XRD,FT…
Due to the hydrophilic property,the application of poly vinyl alcohol(PVA) in food package is greatly limited.In this paper,the effect of PVA-based composite film modified by adding nano-SiO2 on packaging efficacy was evaluated by measuring vapor transmission rate,water-absorbing rate,transmittance,gas permeability an…
The basic property,extraction method and the cosmetology application about hyaluronic acid,collagen,chondroitin sulfate,keratin in the eggshell membrane were introduced.These may provide useful references for deeper exploitation and utilization of eggshell membrane.
In order to study water treeing in polyethylene at different temperatures,low density polythene and peroxide cross-linked polyethylene were chosen as the testing materials.At room temperature(20°C),40°C,60°C and 80°C,liquid needle electrodes method was used for water tree development,and metallographic microscope was…
Two methods,PIONA and PHONA were built to analyze component of gasoline with different olefin content based on multi-dimensional chromatograph made by AC.They can meet demands of domestic gasoline component determination.The research results show that: PHONA model with two olefin adsorption temperatures is suitable to…
Rare earth-based hydrogen storage alloys are the first developed hydrogen storage alloys and the only hydrogen storage alloys applied in a large scale now.This review is devoted to review the progress in rare earth-based high performance hydrogen storage alloys.The preparation methods,such as induction melting,arc mel…
Luminescence-electricity bifunctional Eu(BA)3phen/PANI/PVP composite nanofibers were prepared through the doping of polyaniline(PANI) and rare earth complex[Eu(BA)3phen] in polyrinyl phrrolidone(PVP) via electrospinning.Scanning electron microscope(SEM),energy dispersive spectrometer(EDS),fluorescence spectrometer and…
Conventional fiber analysis methods,e.g.AATCC 20A—2010,can be used to identify aromatic polyester from other fiber materials,but can not identify polyester types(PET,PTT,PBT).In this article,differential scanning calorimetry(DSC) is used to qualitatively characterize different types of polyester materials based on the…
A new method to design the diameter of pass(Dx) was established according to the deformation characteristics of rolling and the properties of unidirectional tensile curve.The thickness of the cross-section and pass diameter were decreased,while the reduction of area increases with the process,but the increment decreas…
The PEG was grafted onto the surface of polyurethane membranes using a microwave irradiation technology,which was compared with the conventional heated method.The results showed that microwave could apparently accelerate grafting polymerization of the polyurethane surface.Microwave power,reaction time as well as the m…
The TiO2/5A catalysts were prepared by sol-gel-dipping method.The photocatalytic activities were evaluated by catalytic degradation rate of CN-in water samples,and compared with the catalytic activity of the P25 style nano-TiO2 for degrading CN-,then the effects of the percentage composition of 5A molecular sieve load…
Taxi emissions are an important source of urban air pollution,so controlling emissions from high emission taxis is critically important for air quality improvement.Six representative high mileage gasoline taxis in Beijing were chosen,and the effects of vehicle maintenance and replacement of the three-way catalytic con…
Objective: To investigate the effect of triterpenes compound of cortex periplocae(TCCP) on the expression of proliferating cell nuclear antigen(PCNA) in N-nitrosomethylbenzylamine(NMBA)-induced rat esophageal carcinoma.Methods: 120 male F344 rats were randomly divided into four groups: a model group treated with NMBA…
In this paper,the physical and chemical property and the synthetic process of PLA were introduced.Also the research progress of PLA′s performance promotion was summarized.it′s application field and application prospect were presented.
Aiming at the phenomenon that the damping bars would easily fuse under the asymmetrical operation of large hydro-generator,the eddy current loss of damping bars under the asymmetrical operation of a 1 000 MW hydro-generator was further studied on the basis of establishing two-dimensional electromagnetic field-circuit-…
Calcium carbonate was synthesized by biomimetic synthetic method using gas diffusion process and sodium citrate as control agent.The effect of mineralization time on crystallization and morphology of CaCO3 was studied.The as-prepared samples were characterized by scanning electron microscopy(SEM),transmission electron…