Materials Literature
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The recent progress of increasing energy density of electrochemical capacitors(EC) was reviewed.The electrochemical performance of various EC with the different modified electrode materials and the emerging materials was presented in detail.The challenges which EC meets were pointed out,and the application prospects o…
The influence of thermal oxidative aging on dispersion stability of SBR latex was investigated.The results showed that,during the thermal aging,carboxylic acid which was produced in a oxidative decomposition reaction of nonionic surfactant caused the decrease of pH value,and then the reduction of pH value caused the d…
In order to study the galvanic corrosion of 7475 aluminum alloy,the galvanic corrosion of the 7475 aluminum alloy with TC18 titanium alloy is measured by means of current density of electric couples.The morphology and the depth of the corrosion surface are analyzed by a SEM and an optical microscope.The galvanic corro…
In plate rolling,width spread of each rolling pass has definite bearing on the width precision of the finishing products.Based on the conventional width spread model and technological characteristics of plate rolling process,a width spread coefficient computation model dedicated to multi-pass rolling process is derive…
Shielding effect and emission criterion of a screw dislocation near an interracial crisscross crack are dealt with in this paper. Utilizing the conformal mapping technique, the closed-form solutions are derived for complex potentials and stress fields due to a screw dislocation located near the interracial crisscross…
A series of polybenzobiso xazoles,including PBO,poly(1,4-naphthalene benzobisoxazole)(1,4-PNBO),poly(2,6-naphthalene benzobi soxazole)(2,6-PNBO),poly(2,5-thiophene benzobisoxazole)(PTBO) and poly-4,4′-(1,2-diphynylethylene benzobisoxazole)(4,4′-PDPEBO),were synthesized by polycondensation of 4,6-diamino-1,3-benzenedio…
A C/SiC/Si-SiC multilayer coating for protecting carbon/carbon(C/C) composites against oxidation was prepared by slurry and pack cementation.X-ray diffraction(XRD) and energy dispersive spectroscopy(EDS) analysis showed that the inner coating obtained from the slurry and pack cementation was a C/SiC gradient layer act…
NiMo supported catalysts were prepared using three composite supports, namely HY-Al2O3, TiO2-Al2O3, ZrO2-Al2O3. Effects of the support,the support composition and active metal loadings on the catalytic performance of the cata- lysts for diesel hydrodesulfurization were investigated. Characterization results of the cat…
The development status of the evenness instrument and the development of evenness testing expert systems were introduced.With the advances of computer technology,after decades of development,the yarn evenness instrument was getting mature.Based on Spectrum analysis,the mechanical,Capaitive and photoelectric test instr…
Kneading blocks were introduced into regular intermeshing counter-rotating twin-screw extruder to enhance its mixing performance.PE-HD/PS blends were mixed with this equipment and the resulted morphology and diameter of the dispersed phase(PS) were investigated using SEM.It showed that the kneading blocks did improve…
This paper tests the residual stress in nanocrystalline 316L stainless steel and ordinary 316L stainless steel,whose results are compared and whose results show that nanocrystallization induced by ultrasonic shot peening is a reliable way to increase the material's strength character.
An integrated process modeling system for continuous hot rod and bar mill is introduced in this paper.The system is designed and dedicated to analyzing the influences of mill configuration and processing parameters on deformation,temperature change and microstructure evolution of rolled rod and bar during multipass ho…
Objective: To investigate the analgesic effect of morphine encapsulated in polylactide-grafted dextran copolymer(MP/DEX-PLA) nano-micelles on acute nociception in rats.Methods: 40 male adult SD rats,weighing 220～280g,were randomly allocated to four groups(n = 10): group A(control group),group B(received DEX-PLA withou…
To study the characteristics of the surface of wood fibers,including the surface tension and its variation at different temperatures,contact angles have been measured and regression has been theoretically calculated.Results show that the surface tension of fir,poplar and bamboo wood fibers at 25 ℃ is 46.75,40.01 and 3…
Ca3-x-ySc2Si3O12:xCe3+,yNd3+ phosphor powders were synthesized by the conventional solid-state reaction method in a reductive atmosphere.The structure of the phosphor was characterized by X-ray diffraction.The influences of Ce3+/Nd3+ concentration on the spectrum shape,fluorescence intensity and fluorescence lifetimes…
To improve the bending rigidity of polyester filament lining fabric,the influences of fabric structure on the bending rigidity during dyeing and finishing were studied.Experiments to simulate the dyeing and finishing processes were undertaken,process conditions were varied so that structural change of the fabric as af…
Nanocomposite coat-ings usually have higher hardness and better wear resistance,friction-reducing performance,corrosion resistance,high temper-ature performance,electric performance and electro-catalytic performance as compared with conventional composite coatings.Particularly,Ni-based nanocomposite coatings were stud…
Objective To investigate the feasibility of a freeze-drying technique preservation protocol on the acellular vascular scaffold. Methods Acellular vascular scaffolds were treated by freezing and drying technique at-70℃(6.67×10-4kPa) for 6h, then appraised the scaffolds by histological and ultrastructural observation an…
Two injection molding processes,i.e.pellet molding process and powder molding process,were compared.Fctors of influencing the powder molding process were analyzed in four aspects,i.e.equipment,mould,formula and process.
Using optical microscopy,scanning electron microscopy(SEM) and electron back scatter diffraction(EBSD),microstructural evolution of twin-roll-cast(TRC) ZK60 magnesium alloy was examined during hot compression and annealing treatment.The microstructure of the twin-roll-cast alloy hot-compressed(HC) at low and high stra…