Materials Literature
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In order to determine the optimal reinforcement phase of wind turbine blades composite material,the bamboos at 3-7 years were tested by a Q800 dynamic mechanical thermal analysis(DMA) instrument.The outer faces of bamboo board as the reinforcement of wind turbine blades composite materials were tested.The outer faces…
The conductivity of electrically conductive adhesives(ECAs) was improved by surface functionalizing silver flakes with dicarboxylic acids,or by directly adding dicarboxylic acids into ECA.The resistivity of ECAs was among(2-5)×10-5Ω·cm.Raman spectroscopy and X-ray photoelectron spectroscopy reveal that pentanedioic ac…
Polysulfone(PSF) ultrafiltration hollow fiber base membranes were fabricated by the dry/wet-spinning method.PDMS/PSF hollow fiber composite membranes were prepared by coating PDMS solution on the outer surface of PSF ultrafiltration membranes using dip-coated method.PDMS swelling behavior and pervaporation performance…
In order to understand the relationship between thermal aging level of oil-paper insulation and its space charge properties,accelerated thermal aging tests were conducted on samples composed of #25 mineral oil and ordinary Kraft paper.The space charge properties of aged samples under DC voltage(20 kV/mm) were studied…
In order to obtain the best spherical effect for HMX,the technical process of HMX spherulitic recrystallization from DMF-H_2O was studied.It showed that when temperature was 57℃,stirring speed was 140r/min,the ratio between volume of solvent and nonsolvent was 1:3.5,and dilution rate was 0.153mL/min,the recrystallizat…
Electroactive polyaniline(PANI) thin films were synthesized on platinum substrates by electrochemical polymerization,the electrochemical quartz crystal microbalance(EQCM) technique was adopted to investigate the polymerization process of the PANI film and its redox behavior in phenol solution.Combined with cyclic volt…
In this study,spruce wood used for piano was treated by either high temperature steaming or second drying.The hygroscopicity of spruce wood with wide or narrow annual ring was investigated.It was found that the moisture absorption of the samples was effectively decreased by both treatments,and that higher treatment te…
4-Amino-3-azidocarbonylfuroxan(ANFO) was first synthesized via nitration and nitrosation in one-pot,using malonic acid monohydrazide monopotassium salt as starting material.Then 3,3'-diamino-4,4'-azofuroxan(DAAFO)was prepared using ANFO.Finally,DAAFO were directly oxidized to DNAFO by hydrogen peroxide/sulfuric acid s…
This text made a simple review to the PCB surface processing,the important reactive mechanics of OSP,the characteristics of OSP product,the course of OSP that formed film,acetic acid and ammonia water initial value sensitive dependence to formed film,micoetching to formed film,and exercising mechanism of the OSP which…
The dissolving behaviours of second phase particles in ultra-low carbon Nb-Ti microalloyed steel during holding at 1300℃ were investigated by carbon extraction replicas,TEM and EDX techniques.The experimental results indicate that there are two kinds of precipitates in as-rolled steel: the coarsened Ti-rich precipitat…
The development on high temperature resistance adhesives was summarized at home and abroad.The research actualities of synthesis and modification for high temperature resistance adhesives,including organic adhesives(such as epoxy resin,polyimide,phenolic resins,polyurethane and other adhesives) and inorganic adhesives…
Chitosan was applied in paper barrier coating.The closed degrees of pore volume as well as oxygen barrier and moisture barrier properties under different coating weights were studied.Meanwhile,to improve moisture barrier properties with bi-layer composites of chitosan/PVDC was discussed.The results showed that the ori…
A kind of glycol containing imide function was synthesized from trimellitic anhydride,4,4'-diaminodiphenyl ether and diethylene glycol.A new type of polyurethane-imide elastic material was synthesized from isocyanate terminated PU prepolymer,glycol containing imide function.The productions are characterized with Fouri…
Magnesium slag cementitious material was prepared with magnesium slag,furnace slag and cement clinker.The effect of use level of magnesium slag and cement clinker,grinding process and supplementary activators on the strength of the cementitious material was studied.The mineral composition of hydration product of the c…
Serine proteases are involved in melanization which is used to combat with the intrusive pathogens and protect the damaged tissue in insect.To explore the role of serine proteases in the cascade activating system of prophenoloxidase during melanization in silkworm(Bombyx mori),we cloned a novel serine protease gene,de…
The hydrolysis mechanism of formoxyl of TADFIW was studied by a density-functional theory method in B3LYP/6-31G(d,p) level.The results showed that,when hydrolysis reaction of formoxyl of TADFIW took place,the oxygen atom of carbon-oxygen double bond had negative charges with 0.619e,while the carbon atom had positive c…
At present,General Services Administration(GSA) standard method is widely used for reference to analyze progressive collapse of buildings.However,the criteria of collapse evaluation of this method are found inapplicable in China.Although the loading on structure caused by air shock wave and the damage failure of struc…
(La1-xNdx)2Mg(Ni0.8Co0.15Mn0.05)9(x=0~0.3)hydrogen storage alloys were prepared by inductive melting,the effects of substitution of Nd for La on the phase structure,hydrogen storage properties and electrochemical characteristics of the alloys were studied systematically.The results show that the alloys are mainly cons…
This paper presented the study on the catalytic performance of a deposition-precipitation prepared Au catalyst supported on cop-per-manganese complex oxide,which was synthesized via a sol-gel method. This Au/CuxMnyOz catalyst with a low Au content exhibited high activity for both preferential CO oxidation and water-ga…
A new technology for testing dynamic properties of materials was proposed by developing an experimental setup based on a split-Hopkinson pressure bar system.The experimental setup can be used in dynamic indentation experiments to obtain the indentation displacements of materials and the impact load suffered by them.To…