Materials Literature
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Samples of RDX-CMDB propellants containing catalysts with RDX replaced by guanidinium azotetrazolate(GZT) were prepared using slurry casting technique.The influences of GZT on combustion behaviors of RDX-CMDB propellants including burning rates,pressure exponents and flame structure were studied,and the reasons for th…
For meeting the needs of functional finishing of skin-care textile,vitamin E(VE) core polyurethane microcapsules were successfully prepared via interfacial polymerization of polyurethane with toluene diisocyanate(TDI) and polyethylene glycol(PEG) as the prepolymer.The factors affecting microencapsulation effectiveness…
Non-hydrogenated silicon doped DLC film was prepared by DC magnetron sputtering of graphite target,frequency magnetron sputtering of silicon carbide target and ion source compound deposition technique.The performance of Si-DLC films with different Si content were excellent,which have low friction coefficient and wear…
A new one-dimensional nickel(Ⅱ) compound [Ni(BIPA)(1,4-bimb)(H2O)2](1) with 5-bromoisophthalic acid(H2BIPA) and 1,4-bis(imidazol-1-ylmethyl)benzene(1,4-bimb) has been prepared by hydrothermal reaction and characterized by single-crystal X-ray diffraction,IR,elemental analysis,TGA and powder X-ray diffraction(PXRD).Com…
The effects of non-spherical projectile shape on hypervelocity impact are investigated for the cube and flake projectiles,which are the typical shapes of orbital debris in ORDEM2000 and Standard Breakup Model(SBM),by using AUTODYN-3D hydrocode simulations.The characteristics of the debris clouds produced by the hyperv…
The classification and character of honey-comb board for furniture product was analyzed,then structure and process requirement of board on-frame,frameless honey-comb,semi board on-frame was illustrated according to different usage situation,and construction of board frame can be classified to two types: horizontal ass…
In the present study,using the chlorophyll fluorescence technique,the suppressive effect of germanium dioxide(GeO2)on Nitzschia sp.contamination during the cultivation of Saccharina japonica seedling was investigated with the photosystem II maximum fluorescence yield(Fv/Fm) as the index.The results showed that: 1) Whe…
The waterborne anionic polyurethane emulsion(PU) synthesized by using 4,4'-methy-lenebis phenylisocyanate(MDI) was mechanically blended with the polyacrylate latex emulsion(PA).The effects of the different proportion of PU and PA on the structures and properties on the composite materials have been studied.It has been…
Recent research on the mixing procedure of metal-matrix-composites reinforced with carbon nanotubes is reviewed.The effect of mixing procedure on the distribution of carbon nanotubes is analyzed.The future research direction about mixing procedure of metal-matrix-composites reinforced with carbon nanotubes is predicte…
The effect of intensifier on properties of soy protein/polyvinyl alcohol films were studied through a vague mathematics model,using tensile strength,elongation,transmittance and water absorption as indexes.The results showed that compared with the controlled films,the films added soluble starch had a distinctively hig…
Hydrogen-induce ductility loss in YB70 steel was investigated by measurements of tensile properties as well as TEM and SEM analyses of deformation and fracture.The result shows that the hydrogen-induce ductility loss in YB70 steel exceeds 80% when tensile specimens were hydrogen-charged for more than 2 h.Some transgra…
In the study,531 children of 4~6 years old in Henan area were chosen as objects and twenty-two items of their body data are analyzed by use of principal component analysis and regression analysis with SAS software.By principal component analysis,11 measurement indexes were selected which can summarize children's body…
A modified graphite electrode(GE) with poly(β-alanine) was fabricated through an electrochemical oxidation procedure and was used to electrochemically detect dopamine(DA),ascorbic acid(AA),uric acid(UA) and their ternary mixture by cyclic voltammetry(CV) and linear sweep voltammetry(LSV) method.The modified electrode…
The morphological structure, moisture regain and thermal properties of five kinds of the cellulose powders of kapok, cattail, bamboo-pulp, wood-pulp and reed-pulp were investigated. It was found that the cellulose powders showed irregular shapes and their surface had different degree of damage, but the morphological c…
Two Cr3C2-25%NiCr coating was prepared by high velocity oxy-fuel(HVOF) system using two commercially available agglomerated-sintered and sintered-claded feedtock.The influences of powder characteristics on the microstructure,porosity,microhardness and abrasive wear performance of Cr3C2-25%NiCr coating were investigate…
This study investigates the hydrogen-air PEMFC stack recession, whose stack has been used for three years. By installing a 5kW fuel cell stack in a golf cart, the test is done, including road test and bench test. The results indicate that the hydrogen-air fuel cell stack dynamic performance declines a lot, whose power…
To prepare high activity chito-oligosaccharide and to study its biological activity,the number average molecular mass of chito-oligosaccharide which prepared by degradation with specific chitosanase was determined with acetylacetone method.Mice were administered with chito-oligosaccharide with different doses,to discu…
According to the status of clothing market segmentation based on age differences,the age factor was introduced to study the size standard subdivision for wonen's garment and 379 groups of body-type data samples for adult women 26 to 55 years old were collected by using non-contact 3D body measurement instrument.Throug…
Al2(1-x)MgxTi1+xO5-δ(x=0-0.25) ceramic were prepared by hot-press sintering method at 1350-1550 ℃ in Argon atmosphere with α-Al2O3,anatase TiO2 and MgO followed the constitution of Al2(1-x)MgxTi1+xO5.Effect of sintering temperature and MgO additive on the densification of the material and oxygen vacancy which was a ki…
Four decorative panels made from regular blockboard,flame retardant blockboard,rubber insulation board,and fire retardant plywood were evaluated for their combustion properties:heat release rate(HRR),fire growth rate indices(FIGRA),total heat release(THR),total smoke production(TSP),and smoke growth rate(SMOGRA)using…