Materials Literature
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Aiming at reducing the high production cost of polyhydroxyalkanoates(PHA),a viable solution by the utilization of waste and surplus materials for the production of PHA was reviewed.The utilization of waste materials for production of PHA not only enhances the economics of such products,but also provides with a strateg…
The series compounds belonging to the lithium fast ion conductor ceramic materials Li_(3x)La_(2/3-x)TiO_3(LLTO for the shortened form) for x=0.05,0.11 and 0.15 were synthesized by the sol-gel method.The structure and purity of the products were analyzed by X-ray diffraction method, and they were perovskite structure.T…
The Ce0.8Gd0.2O1.9(CGO) solid electrolyte was prepared by using convential sintering after dry-pressing.The samples were sintered in air for 4 h from 1 300 ℃ to 1 500 ℃.The line shrinkage rate,relative density,phase and micro-morphology of the samples were analyzed.By contrasting the electrochemical impedance spectros…
The Hamiltonian of a nanorod with an ellipsoidal boundary is given after a coordinate transformation that changes the ellipsoidal boundary into a spherical one.The nanorods constitute the bridge between two-dimensional quantum wells,zero-dimensional quantum dots and one-dimensional quantum wires is explored theoretica…
The basic principle of electron back scattering diffraction(EBSD) technique is introduced.The sample preparation,the experimental process,the obtaining data and the data processing of CP-Ti is introduced in EBSD experiments.The results show that the large majority of grain boundaries are the high angle grain boundarie…
Objective To prepare and characterize the poly(lactic-co-glycolic acid)(PLGA) microspheres containing 10-hydroxycamptothecin(PMCH).Methods PMCH were prepared by emulsion-solvent evaporation method,the morphology was examined by scanning electron microscope,the encapsulation efficiency,drug loading rate and in vitro re…
Acid-soluble collagens (ASC) and water-soluble collagens (WSC) were isolated from fish scale, and the antioxidant activity of fish scale collagen was studied. Pyrogallol autoxidation method was used to measure the scavenging activity of fish scale collagen on superoxide anion radical(·O2 - ). The Fenton reaction syste…
Special silicon mullite brick for cement kiln was prepared by the production technology of proper particle size grading,high pressure pressing and high temperature sintering using bauxite clinke,90 silicon carbide and brown alundum as raw materials,and andalusite powder and guangxi white clay as additives.The bulk den…
Although carbon nanotubes(CNTs) have many good properties,such as high Young modulus,hardness and toughness,good electrical conductivity and thermal conductivity,its poor dispersibility have imposed great limitations to its applications and development.Hyperbranched polymer(HBP) has low viscosity,high rheological beha…
Three derivatives of triphylamine with both amine used as donor group and nitro used as acceptor group were synthesized by 4-nitrotriphenylamine,4,4′-dinitrotriphenylamine and 4,4′,4″-trinitro triphenylamine noted as NTPA,DNTPA,and TNTPA,respectively.The influence of the number of substituted groups,solvent polarities…
A scale inhibitor,poly(maleic anhydride-acrylic acid-sodium allylsulfonate) terpolymer(BSI),was synthesized by the copolymerization of maleic anhydride,acrylic acid and sodium allylsulfonate with ammonium persulfate as the initiator.The effects of BSI concentration, temperature,time,pH,NaCl concentration and the conce…
In order to choose an appropriate boosting scheme in the design of Earth Penetrating Weapon with boosting,the penetration effect was simulated with LS-DYNA3D.Through comparing the numerical simulation result of the EPW into concrete targets with the data which was measured in the experiment,it was showed that the mode…
In order to investigate the influence of multi-pass equal channel angular pressing(ECAP) on the yielding and hardening of a metal,pure copper was used as a target material,and the experimental investigations on the yielding and hardening behavior of the material samples after multi-pass of ECAP were carried out.The an…
With the increasing demand for more efficient utilization of cellulose,the modification of cellulose by graft polymerization provides a significant route to combining the advantages of natural and synthetic macromolecules for a wide range of potential applications.The synthesis of cellulose-graft-PHEMA copolymer via h…
Four kinds of copper-steel bearing materials were prepared by the conventional powder metallurgy method.The wear and friction tests were conducted by using the HDM-20 tribometer under the boundary lubrication conditions,and the PV value of the friction and wear was also tested by using the MPV-1500 tribometer.The prop…
The Ni-P-W/Al2O3 composite coatings were deposited on the NdFeB magnetic materials surface by electroless plating method.The microstructures were observed,and the phases existed in the coatings were also identified.The interfacial bonding strength between Ni-P-W/Al2O3 composite coatings and NdFeB matrix was also teste…
Trimanganese tetraoxide used as anode material in lithium secondary battery was prepared by means of direct oxidation reaction 12 h with air at 75 ℃,pH value of 6.5 and manganese sulfate monohydrate as raw materials,while the concentration of Mn2+ was 60~70 g/L and the air flow and stirring speed were appropriate.Resu…
Take environment-friendly styrene-butadiene rubber SBR1502E of Jilin Petrochemical Company as the research object.The effects of pH value of the coagulating liquid on the properties of SBR gums were investigated.The result showed that:without changing the coagulating liquid temperature,latex feeding quantity and polym…
The DFT and the NEGF based on the first theory are used to study the electronic structure and the electronic transmission characteristics of the metal fullerene derivatives Mg@C_(32) and Na@C_(32) between two electrodes Au(1,1,1).The curves of electronic transmission probability andⅠ—Ⅴare obtained. The factors affect…
During the active extrusion process,the stress state is complex and the metal flow is affected by many factors.By Deform-3D finite element simulation software,it was simulated that metal flow of tee joint and the evolution of flow line in multi-direction synchronized extrusion conditions.Deformation division was obtai…