Materials Literature
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A new zinc coordination polymer, [Zn2(bpp)(tpa)2H2O] 1 (bpp=1,3-bis(4-pyridyl)-propane and tpa=terephthalate) has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic, space g…
In this paper,liquid phase reduction method was applied to prepare superfine copper-silver coated powder.Copper powder was prepared with ascorbic acid as reductant while glucose beforehand reduction method was applied,and copper coated with silver powder was prepared with hydrazine hydrate as reductant.Besides,differe…
A bilayer coating was prepared by electrodepositing a polythiophene(PTH) film on the surface of 304 stainless steel treated by alternating-potential-step passivation.Its structure was characterized by FTIR spectroscopy,SEM and AFM.Its corrosion resistance was also evaluated by electrochemical methods.The results indic…
Lithium-ion batteries for their unique advantages become a hot research,and their anode material is one of the key materials.In order to keep up with the development and application of lithium ion batteries in new areas,new and cheap anode materials are required for continuous research.The development of the tradition…
Graphene nanosheets(GNSs)with few-layer graphene have been prepared from natural flake graphite by oxidation intercalation and microwave expansion.Then GNSs was modified by silane coupling agent KH560.GNSs/EP composites was finally prepared by the ultrasonic mixing method.The structure and morphology of the samples we…
A series of polyurethane was prepared via acetone process from 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate(IPDI),polypropylene glycol-1000(PPG-1000) and dimethylol propionic acid(DMPA).In the polyurethane chains,DMPA mass content were 2.1,4.2,6.4 and 8.6% with isocyanate(-NCO) as capping agent.According to…
The effect of nano-chitosan coating on the quality of fresh-cut Z.latifolia was investigated.Fresh-cut Z.latifolia slices were dipped into deionised water(the control),10 g/L chitosan or the mixture of 10 g/L chitosan and 1.5 g/L nano-chitosan for 3 min,and then dried,packaged and finally stored for 12 days at 1±0.5 ℃…
Introduced the process parameters of 20-roller Sendzimir cold rolling mill for BA stainless steel.A detailed analysis of the Sendzimir mill compared with others in the past on some mechanical structure respects was improved,including the improvement of the filtration system;AS-U-Roll adjusting mechanism and the hydrau…
Background: Steel plate reinforced concrete structure has small thickness,high capacity and high ductility,which is mainly used in nuclear power reactor facilities.Due to test condition,the mechanical properties and ultimate capacity of steel concrete structure under high temperature is little studied.The properties o…
Numerical and experimental studies were carried out on a 2LHPCR diesel engine to explore the effects of fuel injection pressure on the processes of fuel spray,air-fuel mixing and the formation of harmful emission.Results show that,as the injection pressure increases,the spray penetration increases,the Sauter Mean Diam…
Principles and the latest development of preparation processes of high purity tungsten are summarized.Both chemical purification methods and physical purification methods are emphatically reviewed,the former covers precipitation separation,solvent extraction and ion exchange,and the latter covers vacuum degassing,vacu…
The influence of Ni equivalence on the impact toughness of maraging stainless steel 00Cr13Co9Ni5Mo5 has been researched on microstructure,volume fraction of austenite and grain size of different steels.The results show that Ni,Mn are expanded austenite area elements.Austenitic volume fraction increased significantly w…
Duplex stainless steels with good toughness,weldability and high strength,resistance to chloride pitting and stress corrosion,have been widely used as seawater piping materials.However,early corrosion failure in the duplex stainless steel pipe connections occurred under certain operating conditions.In this paper,failu…
Based on the Hummers method,the graphite oxide was synthesized from graphite powder through liquid oxidation.Then,the graphene oxide was obtained by high-temperature treatment of the graphite oxide.Finally,the ideal grapheme was prepared by hydrothermal method of reduction of graphene oxide with glycol.The graphite ox…
SiO2 encapsulated Ni core-shell structure composite nanoparticles were prepared by the sol-gel method using TEOS and Ni nanoparticles as the main raw materials. The crystal structure,morphology,constituent elements and magnetic properties of the products were investigated by means of X-ray diffraction(XRD),high-resolu…
The microstructure of HR3C steel was investigated using optical microscopy,scanning electron microscopy and X-ray diffractioa And the susceptibility to intergranular corrosion of HR3C steel was evaluated by electrochemical potentiodynamic reactivation(EPR).The results show that the microstructure of HR3C steel consist…
The stable isotope 56Fe was used to simulate the radioactive 55Fe,59Fe,and 52Fe ions existing in the wastewater generated by nuclear medicine and then the removal efficiency of 56Fe2+ in water was studied using chitosan functionalized multi-walled carbon nanotubes(CS-MWNTs) as adsorbent.The influences of pH,temperatur…
In order to improve the wet shear strength of soy protein based adhesive,the authors used two resins as a cross-linking agent to modify soy protein based adhesive.The modified soy protein-based adhesive was then used to make plywood samples.The results showed that when processed at 160 ℃,1.5 MPa,2 min/mm,and 380 g/m2…
The geometrical structures and nonlinear optical(NLO) properties of fourteen foreign-atom-doping(6,0) boron nitride nanotubes with B/N vacancy defect,M-Va-BNNT(a=B and N;M=Li,Na,K,Be,Mg,Ca,C and Si),were investigated with the density functional theory(DFT) method.The computational results reveal that the B/N vacancy d…
The explosion characteristics of black powder dust were studied experimentally by using the 20 L spherical explosion device designed by ourselves and the minimum ignition energy measuring device. The results show that the effect of particle size on the lower explosion limit is not noticeable. The maximum explosion pre…