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FORMING AND PRECISION MACHINING TO NANOMATERIALS LUMP

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Chinese Journal of Mechanical Engineering 2004年第4期17卷 534-536页

作者： ZhanJie ZhangJin ChenBingkui ChenXiaoan collegeofmaterialsengineering ChongqingInstituteofTechnologyChongqing400050China

The technology of forming and machining lump nano-materials has beeninvestigated. Grinding, abrasive machining test has been conducted to Fe, Co, Ni and Al lumpnano-materials. Experiments have been done to measure grinding force, grinding thermal, machiningroughness and micro-hardness. Image analysis is carried out by metallographic and scanning tunnelmicroscopic microscope. Researches provide the basis data for forming and machining lumpnano-materials.

关键词： Nano-materials Grinding machining Abrasive machining

Synthesis and Flocculation Property of Chitosan-Acrylamide Graft Copolymer

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Chemical Research in Chinese Universities 2004年第2期20卷 221-224页

作者： LILiu-zhu MAOLu-yuan WANGXiu-li YANGYong ZHUANGYin-feng collegeofmaterialsengineering ZhengzhouUniversityZhengzhou450052P.R.China

Chitosan, as a kind of natural polymer, has many advantages, such as abundant sources, biological degradation, no secondary contamination and facile modification. In this work, we prepared modified chitosan flocculants with double electrical behavior via polymerizing chitosan, acrylamide and sodium carboxymethyl cellulose together by using ammonium persulfate as the indicator in water. The product is a comb-type of chitosan copolymer and a polymeric ampholyte. And then we studied the product by FTIR, UV-Vis, TG, DSC spectrometeries and viscometry, etc. We also performed CACM′s water treat experiment. The effects of pH values, reaction time and dose of the new floccalant on treating various of waste water have been investigated, too.

关键词： Organic flocculant Chitosan Acrylamide Copolymer

Polymerization of o-Phenylenediamine Catalyzed byHemeproteins Encapsulated in Reversed Micelle

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Chemical Research in Chinese Universities 2004年第2期20卷 240-243页

作者： YANGYong MAOLu-yuan LILiu-zhu LIUXiao-guang SHIJun CAOShao-kui LabofBiomimeticMacromolecule CollegeofMaterialsEngineeringZhengzhouUniversityZhengzhou450052P.R.China

Hemeproteins encapsulated in reversed micelle formulated with di-2-ethylhexyl sulfosuccinate(AOT) was found to catalyze the polymerization of o-phenylenediamine(o-PDA) with hydrogen peroxide, whereas o-PDA catalyzed by hemeproteins dissolved in water could only form its trimers. As the nanostructural environment in reversed micelle acts as a certain orientation surrounding medium, it offers a strong electrostatic field that alters the reductive potential of Fe 3+/Fe 2+(E m7) in the heme of hemeproteins and thus increases the catalytic activity of peroxidase accordingly. According to the results of UV-Vis, 1H NMR and FTIR, the polymer catalyzed by hemoglobin(Hb) in reversed micelle was presumed to be constructed of lines and trapeziforms alternatively.

关键词： Hemeprotein Hemoglobin Horseradish peroxidase Reversed micell o-Phenylenediamine

Prediction of Properties in Thermomechanically Treated Cu-Cr-Zr Alloy by an Artificial Neural Network

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Journal of Materials Science & Technology 2003年第6期19卷 529-532页

作者： JuanhuaSU QimingDONG PingLIU HejunLI BuxiKANG CollegeofMaterialsScienceandEngineering NorthwesternPolytechnicalUniversityXi'an710072China collegeofmaterialsengineering HenanUniversityofScienceandTechnologyLuoyang471003China

A supervised artificial neural network (ANN) to model the nonlinear relationship between parameters of thermomechanical treatment processes with respect to hardness and conductivity properties was proposed for Cu-Cr-Zr alloy. The improved model was developed by the Levenberg-Marquardt training algorithm. A basic repository on the domain knowledge of thermomechanical treatment processes is established via sufficient data acquisition by the network. The results show that the ANN system is an effective way and can be successfully used to predict and analyze the properties of Cu-Cr-Zr alloy.

关键词： Cu-Cr-Zr alloy Thermomechanical treatment Levenberg-Marquardt algorithm,Artificial neural network

DETERMINATION OF DEGREE OF CRYSTALLINITY OF NYLON 1212 BY WIDE-ANGLE X-RAY DIFFRACTION

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Chinese Journal of Polymer Science 2004年第5期22卷 491-496页

作者： Jian-binSong Min-qiaoRen Qing-yongChen Shu-yunWang Qing-xiangZhao Hong-fangZhang 莫志深 StateKeyLaboratoryofPolymerPhysicsandChemistry ChangchunInstituteofAppliedChemistryChineseAcademyofSciencesChangchun130022China collegeofmaterialsengineering Zhengzhou-UniversityZhengzhou450052China

Based on the X-ray scattering intensity theory and using the approximate expression for the atomic scattering factor, the correction factors for three crystalline peaks and an amorphous peak of Nylon 1212 were calculated and the formula of degree of crystallinity of Nylon 1212 was derived by a graphic multipeak resolution method. The degree of crystallinity calculated from the WAXD method is compatible with those obtained by density and calorimetry methods.

关键词： Degree of crystallinity WAXD Nylon 1212