Materials Literature
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Air-cooled proton exchange membrane fuel cells(PEMFC) simplify the traditional cooling and air supply system which improve the portable of it.An air-cooled stack with 19 cells was assembled to investigate the effects of air flow,stack temperature and dead-end mode of anode outlet on the stack performance.It revealed t…
The pure protein foaming agent featured with the shortcomings high production costs,low multiples of foaming.Horn powder,soybean meal,NaOH,chemical foaming agent,thickener,calcium are chosed by the main raw material;hydrolyzed protein foaming agent formulations and conditions of orthogonal experiments,and developed a…
The microstructure and properties of two kinds of low carbon alloy steel used for liner board were studied by metallographic microscope,microhardness tester arnd impact tester.The results show that the microstructure of the annealed state is proeutetoid ferrite by adding troostite,after quench-temper,the microstructur…
Based on the first-principle,the electronic structure and magnetic properties of the icosahedral(Ga)12N and(Ga)12B clusters are investigated using the generalized gradient approximation(GGA) under the density functional theory framework,its binding energy(BE),equilibria interatomic distance,the highest occupy molecule…
The numerical simulation on shear stress of Al2O3/Al2O3 joints brazed with the Al2O3 particles reinforced composite filler materials is processed.And then the effect of Al2O3 particles on residual shear stress of ceramic joints is researched.The results show that the maximum shear stress appears in the interface betwe…
Poly(acrylate acid-methacrylate-acrylamide) was synthesized with acrylic acid,acrylamide and methacrylate acid as monomer,N,N'-methylene bisacrylamide as crosslinking agent,potassium persulfate as initiator.Factors such as monomer concentration,monomer ratios and so on were investigated.The optimum moisture absorbency…
As the change of modern dress aesthetic concept,the outline model of modern male trousers has had certain changes.This article elaborated the acquisition size and relax quantity design of male trousers' main parts in detail,analyzed the structure design of main parts,such as: crotch,waist,crease line,etc.,deeply combi…
The Ansys simulate software is utilized to analyse the electrostatic force of the different thickness micro-cantilever beam at the same voltage(not get to the pull-in voltage) in the paper,it obtained the stress of fixed end of micro-beam and the relation between stress and thickness.And then on the basis of analyzing…
In this paper the authors test their main physical indexes of 20 soybean protein woven fabrics,and analyze them with mean method to their respective characteristics.Then sewing experiments carried out respectively on them to have the quality estimation of shrinkage.The related influences of the main characters of the…
This thesis introduces the characteristics,heating sealing method,principle,and heat sealing equipment of polyethylene pipeline,briefly summarizes the principle and operation process of heat sealing connection technique,and expounds the connection attentions and quality control points,so as to guarantee the security o…
To study the percutaneous absorption of the collagen oligopeptide to exsomatize rat skin,vitro penetration model was designed to investigate percutaneous absorption of collagen oligopeptide(the average molecular weight of peptid is 920 Da,50% of oligopeptide,12% of tripeptide) to rat skin.The results of the experiment…
The carbon nanotubes(CNTs)/AZ91 magnesium matrix composites were fabricated by preform-casting under the protection of Ar.The microstructure was observed and analyzed.The room temperature mechanical properties of the composites were tested.The tensile fracture was observed and analyzed via scanning electron microscope…
It is subjected to the important significance for researching and producing wood plastic composite in order to seek for the substitutes of the solid wood and the utilization of the remainder of the wood processing.Meanwhile,it is an effective way for recycling and regeneration of the waste plastics.The advantages of P…
The non-adhesive sealant for high temperature resistant of 600℃ was prepared with mixture of silazane as matrix resin,siloxane as toughness reagent,impregnant,and corresponding fillers(including mica,boron carbide and diatomite).The sealant could bear the pressure up to 4 MPa after twenty four circles between room tem…
Amphiphilic polymeric nanospheres with core of hydrophobic crosslinked polyacrylonitrile(PAN) and shell of hydrophilic crosslinked polyacrylamide and poly(acrylic acid),were prepared via a combination of molecular assembly-assisted emulsion polymerization and chemical modification method.Dynamic light scattering,FT-IR…
The direct electrochemical copolymerization of pyrrole and caprolactam on an indium-tin oxide(ITO) electrode was carried out by potentiostatic methods.The polymerization reaction was controlled under the applied potential over 1.2 V versus Ag/AgCl(saturated KCl) electrode in the nitromethane solution containing 0.05 m…
A silica-microspheres-entrapped monolith was in situ prepared in a 530 μm i.d.fused silica capillary.Performance factors of the prepared monolith capillary column including microstructure,resisting pression ability,permeability,anti-swelling and column efficiency were evaluated.The results show that the monolith is no…
Electroless nickel plating, electroless copper plating and electroless Cu–Ni composite plating were carried out on AB3-type hydrogen storage alloy LaMg2Ni6Mn3, respectively. The maximum discharge capacity is increased from 319 mA·h/g to 390 mA·h/g and the decline rate of discharge capacity is decreased from 20% to 1%…
The as-cast microstructure and phase structure of ZnAl10Cu2 alloy were observed and analyzed by optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),and X-ray diffraction(XRD).The formation mechanism of the structures was also studied.It is shown that the solidification of…
Titanium coatings were prepared via vacuum plasma spraying under different atmosphere environments,and then the oxygen content and bonding strength of the coatings were examined.The results show that atmosphere environment played an important role on the oxygen content of titanium coating,and thus affected significant…