Materials Literature
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Flame retardancy of new phosphorus-nitrogen flame retardant(OP)based on aluminum dialkylphosphinate for nylon 6 was studied.The results showed that the flame retardant had good flame retardancy for nylon 6.When the loading of OP was 25 wt%,the LOI of the nylon 6/OP composite was more than 30 and the flame retarding cl…
This article gave the considerations of the TEOM RP1400a PM10 based on the operation principles,analyzed the conditions of negative value apperance,abnormal flow-rate,obvious non-continuous undulation on the monitor,abnormal display,etc.and proposed the corresponding solutions.
【Objective】 To investigate the effects of acute hypoxia on the electrophysiological properties of VSMCs in guinea-pig spiral modiolar artery.【Methods】 Whole-cell patch clamp recordings were performed to study the effects of acute hypoxia on the whole-cell membrane current,resting membrane potential(RP),membrane input…
Non-equilibrium molecular dynamics(NEMD) method and Tersoff potential energy function were used to simulate the vacancy structural defects effects on the lattice thermal conductivities of silicon thin films.The results of calculations demonstrated that the thermal conductivities of Si thin films decreased rapidly with…
Lotus seed pod procyanidins(LSPCs) were extracted with 70% aqueous ethanol solution and purified by AB-8 macroporous resin adsorption,and their stability and thermal degradation kinetics were investigated.LSPCs were found to be very stable under low temperature,light-avoiding and weakly acidic conditions.NaCl,sucrose…
The cellulose may dissolve in the NaOH/urea/thiourea compound resolver system.This experiment used the orthogonal experiment's method study the NaOH/urea/thiourea density the influence which dissolved to the cellulose,and the influence of each kind of dissolved condition to the dissolves effect.XRD,FT-IR are used to a…
To research the influences of various reasons on the alternating current(AC) pollution flashover voltage of hydrophilic insulator,calculation formulas for residual pollution layer resistance in consideration of arc root radius or neglecting of arc root radius were used,and the Obenaus model was used to calculate the p…
Thermally stimulated depolarization current(TSDC)was used to determine charge transportation and trap levels in dielectric.To investigate and improve TSDC measuring system,the TSDCs of polyester(PET) film cooperating with two types of electrodes,as well as temperature gradient in both types of electrodes,were measured…
Compositions and functional characteristics of peanut protein,film-forming mechanism of peanut protein and major properties including tensile strength,elongation rate during breaking,and water vapor permeability of peanut protein film have been reviewed in this paper.Meanwhile,the physical and chemical factors affecti…
Alumina leafy cluster with hierarchical structure in the form of nanoflakes ended in a bundle was obtained by solvothermal approach using Al(NO3)3·9H2O and CO(NH2)2 as main raw materials,ethanol-water mixture as solvent.The resulting materials were characterized by SEM,XRD,FTIR and N2 adsorption-desorption isothermal…
Nano-cadmium sulfide photocatalysts were synthesized by a solvothermal process in ethanol.Ethylenediamine(EDA),cadmium sulfate and thioacetamide were used as a complexing agent,cadmium source and sulfur source,respectively.The effects of amount of the complexing agent,the reaction temperature and the amount of deposit…
According to the characteristics of hydrotreating reactions,the effects of processing conditions on hydrodenitrogenation(HDN) of VGO were investigated,and the effect of the properties of different VGO on the activation energy was analyzed,on the basis of a large number of HDN experimental data of vacuum hydrowax(VGO)…
The 3D needled C/SiC brake materials were prepared by chemical vapor infiltration(CVI) combined with reactive melt infiltration(RMI) method.The thermal physical properties of the 3D needled C/SiC brake materials were systematically investigated.The results indicate that the thermal expansion coefficients(CTE) of the C…
Microstructure of alloy 690 solid-solutioned at different temperatures was investigated by SEM.Electrochemical behavior of alloy 690 in NaOH solution was examined by means of potentiodynamic polarization,electrochemical impedance spectroscopy(EIS) and localized electrochemical impedance spectroscopy(LEIS).SEM result s…
The mechanical strength of immobilized beads was enhanced using sodium alginate as the embedding agent and CaCl2 as the crosslinking agent.Orthogoal experiments and one-factor experiments were designed to optimize the immobilization conditions.The effects of quantity of entrapmenting bacteria,concentration of sodium a…
The microstructure characteristics of martensite/austenite(M/A) islands of four kinds of X80 and X100 steel pipelines were investigated by optical microscopy and SEM contrastively,and the influences of M/A island microstructure characteristics on mechanical properties were studied combining with the tests of mechanica…
The method of numerical simulation is used to stimulate the change rule of X60 pipeline steel's relative magnetic permeability.Results show that the value of μ_σ varies largely in elastic deformation stage,decreases rapidly along with the increase of stress,and has little change when the load exceeds the yield point,s…
In this paper,the effects of austempered temperature on the morphology of bainite,contents of retained austenite,mechanical properties and wear resistance of carbide austempered ductile iron(CADI)were researched and the impact fracture mechanism was analyzed.The samples whose as-cast microstructures composed of 75% pe…
The modified carbon nanotubes(m-MWCNTs) including carboxylated carbon nanotubes(MWCNTsCOOH), diamino biphenyl methane modified carbon nanotubes(MWCNTs-DDM),boric acid modified carbon nanotubes(MWCNTs-Borate) were prepared by covalent grafting method.The m-MWCNTs were composed with boron phenolic resin(BPR) by in-situ…
The copolymer of humic acid(HA) and acrylic acid(AA) was studied as scale inhibitor,humic acid was modificated by acrylic acid.The effect of molar ratio,initiator dosage,temperature,time on the performance of scale-inhibitor were studied.The results showed:the molar ratio of HA to AA is 1∶1,initiator dosage percentage…