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Synthesis and Lubrication of Phosphorylcholine Derivative

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Journal of Bionic engineering 2010年第3期7卷 254-258页

作者： Zhenliang Qiao~1, Dangsheng Xiong~1, Lude Lu~2. Pengju Jiang~2.1. department of materials {2. and engineering, Nanjing university of {2. and Technology, Nanjing 2.0094, P.R. China 2. School of Chemical engineering, Nanjing university of {2. and Technology, Nanjing 2.0094, P. R. China [a] department of materials {2. engineering Nanjing University of Science Technology Nanjing 210094 P.R. China [b] School of Chemical Engineering Nanjing University of Science Technology Nanjing 210094 P. R. China

The monomer of phosphorylcholine derivative, O-(5-（2.methacryloxy）-3, 3-dimethyl-3-azapentyl)-O’-（ω-hydroxy-octyl）-phosphatequaternary ammonium salt, was designed and synthesized successfully. It was characterized by the spectra ofHNMR and Mass spectra （ESI+）, and every signal was assigned. Then the lubricating characteristics of the phosphorylcholinederivative were investigated on the tribological setup of ball-oh-flat. The Ultra-High Molecular Weight Polyethylene（UHMWPE） flat was rotated against a stainless steel ball with 6 mm diameter. The load was 2.3 N, which corresponded to amaximal Hertz contact pressure of 2. MPa. Water, phosphorylcholine derivative, and Acrylic Acid （AA） solution were used aslubricants, respectively. Compared with AA, the phosphorylcholine derivative shows significant lubrication. It can be stronglyhydrated under water due to the charged segment in chemical structure. The thick water layers within the chains serves asboundary lubricants, and this is thought to be the molecular origins of lubricating behavior.

关键词： artificial joint articular cartilage molecular lubrication mechanism phosphorylcholine synthesis UHMWPE

STUDY ON PROPERTIES OF RECLAIMED SODIUM SILICATE SAND

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Chinese Journal of Mechanical engineering 1998年第3期11卷 49-53页

作者： Zhao Guoping Jiang Zongyu department of materials {2., Jiangsu university of science and Technology Jiangsu Univ of science and Technology Jiangsu China

SEM shows that flowers and plants like sodium carbonate exists on the surface of sodium silicate sand grains when hardened by carbon dioxide, baculiform sodium acetate exists not only on sand surface but also inside sodium silicate film when hardened by ester method. The strength of sodium silicate sand mainly depends on the point bridge connecting strength of dewatered sodium silicate film. The performance of reclaimed sodium silicate sand is determined by the extent of which salinous crystal is eliminated and reasonableness of relevant technological methods.

关键词： Sodium silicate sand Structure Reclamation

PREDICTION ON THE THERMODYNAMIC PROPERTIES OF TERNARY LIQUID ALLOYS BY MODIFIED COORDINATION EQUATION

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Acta Metallurgica Sinica(English Letters) 2001年第4期14卷 241-247页

作者： D.P. Tao School of materials and metallurgical {2., Kunming university of science and Technology, Kun-ming 650093, China Sch. of Mat. Eng. Kunming Univ. of Sci. and Technol. Kunming 650093 China

The coordination numbers in the Molecular Interaction Volume Model can be calcu-lated from the common physical quantities of pure matters.A significant advantage ofthe model lies in its ability to predict the thermodynamic properties of ternary liqmdalloys using only the binary infinite dilute activity coefficients,and the predicted values are in good agreement with the experimental data of ternary liquid alloys,whichshows that the model is reliable,convenient and economic.

关键词： thermodynamic property ternary liquid alloy molecular inter-action volume model modified coordination eguation

High-temperature oxidation behavior of Al_2._3/TiAl matrix composite in air

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science China(Technological sciences) 2009年第5期52卷 1273-1282页

作者： AI TaoTao1,WANG Fen2.& FENG XiaoMing1 1 department of materials {2. and engineering,Shaanxi university of Technology,Hanzhong 72.003,China 2.School of materials {2. and engineering,Shaanxi university of {2. and Technology,Xi’an 71002.,China 1. department of materials {2. and engineering Shaanxi University of Technology Hanzhong 723003 China 2. School of materials science and {2. Shaanxi University of Science and Technology Xi’an 710021 China

The oxidation behavior of Al2.3/TiAl in situ composites fabricated by hot-pressing technology was in-vestigated at 900℃ in static *** results indicate that the mass gains of the composites samples decrease gradually with increasing Nb2.5 content and the inert Al2.3 dispersoids effectively increase the oxidation resistance of the *** higher the Al2.3 dispersoids content,the more pro-nounced the *** primary oxidation precesses obey approximately the linear laws,and the cyclic oxidation precesses follow the parabolic *** oxidized sample containing Ti2.lN and TiAl phases in the scales exhibits excellent oxidation *** oxide scale formed after exposure at 900 ℃ for 12. h is multiple-layered,consisting mainly of an outer TiO2.layer,an intermediate Al2.3 layer,and an inner TiO2.Al2.3 mixed *** the outer layer to the inner layer,TiO2.Al2.3 mixed layer presents the transit of Al-rich oxide to Ti-rich oxide mixed *** the substrate,cross-section micrograph shows a relatively loose layer,and micro-and macro-pores remain on this layer,which is a transition layer and transferres from Al2.3+TiO2.scale to *** thickness of oxide layer is about 2. μ*** is also found that continuous protective alumina scales can not be observed on the surface of oxida-tion *** ions diffuse outwardly to form the outer TiO2.layer,while oxygen ions transport inwardly to form the inner TiO2.Al2.3 mixed *** long-time intensive oxidation exposure,the internal Al2.3 scale has a good adhesiveness with the outer TiO2.*** obvious spallation of the oxide scales *** increased oxidation resistance by the presence of in situ Al2.3 particulates is at-tributed to the enhanced alumina-forming tendency and thin and dense scale ***2.3 particu-lates enhance the potential barrier of Ti ions from M/MO interface to O/MO interface,thereby the TiO2.growth rate decreases,which is also beneficial to improve the oxidation resistance.

关键词： Al2.3/TiAl matrix composite oxidation resistance high temperature

Dynamic Mechanical Behaviour of Ultra-high Performance Fiber Reinforced Concretes

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Journal of Wuhan university of Technology(materials {2.) 2008年第6期23卷 938-945页

作者：赖建中 department of materials {2. & engineering Nanjing University of Science & Technology

Ultra-high performance fiber reinforced concretes （UHPFRC） were prepared by replacing 60% of cement with ultra-fine industrial waste powder. The dynamic mechanical behaviour of UHPFRC with different fiber volume fraction was researched on repeated compressive impact in four kinds of impact modes through split Hopkinson pressure bar （SHPB）. The experimental results show that the peak stress and elastic modulus decrease and the strain rate and peak strain increase gradually with the increasing of impact times. The initial material damage increases and the peak stress of the specimen decreases from the second impact with the increasing of the initial incident wave. Standard strength on repeated impact is defined to compare the ability of resistance against repeated impact among different materials. The rate of reduction of standard strength is decreased by fiber reinforcement under repeated impact. The material damage is reduced and the ability of repeated impact resistance of UHPFRC is improved with the increasing of fiber volume fraction.

关键词： ultra-high performance fiber reinforced concretes split Hopkinson pressurebar dynamic repeated impact

INTERFACIAL REACTIONS OF METAL FILMS WITH AlN SUBSTRATE

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中国有色金属学会会刊：英文版 1996年第2期6卷 81-85页

作者： He Xiangjun Tao Kun Fan Yudian (department of materials {2. and engineering, Tsinghua university, Beijing 100084) department of materials {2. and engineering Tsinghua University Beijing 100084 China

ＩＮＴＥＲＦＡＣＩＡＬＲＥＡＣＴＩＯＮＳＯＦＭＥＴＡＬＦＩＬＭＳＷＩＴＨＡｌＮＳＵＢＳＴＲＡＴＥＨｅＸｉａｎｇｊｕｎ；ＴａｏＫｕｎ；ＦａｎＹｕｄｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥ... 详细信息

ＩＮＴＥＲＦＡＣＩＡＬＲＥＡＣＴＩＯＮＳＯＦＭＥＴＡＬＦＩＬＭＳＷＩＴＨＡｌＮＳＵＢＳＴＲＡＴＥＨｅＸｉａｎｇｊｕｎ；ＴａｏＫｕｎ；ＦａｎＹｕｄｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ｔｓｉｎｇｈ...

关键词： thin films interfacial reactions AlN substrate

TiC－PHASE　DIFFUSION　LAYER　FORMATION　IN　TITANIUM　CLAD　STEEL　COMPOSITE　HAVING　AN　INTERMEDIATE　LAYER　OF　α－Fe

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中国有色金属学会会刊：英文版 1996年第2期6卷 76-80页

作者： Xia Changqing Jin Zhanpeng(department of materials {2. and engineering,Central South university of Technology, Changsha 410083) CENT S UNIV TECHNOL DEPT MAT SCI & ENGNCHANGSHA 410083PEOPLES R CHINA

ＴｉＣ－ＰＨＡＳＥＤＩＦＦＵＳＩＯＮＬＡＹＥＲＦＯＲＭＡＴＩＯＮＩＮＴＩＴＡＮＩＵＭＣＬＡＤＳＴＥＥＬＣＯＭＰＯＳＩＴＥＨＡＶＩＮＧＡＮＩＮＴＥＲＭＥＤＩＡＴＥＬＡＹＥＲＯＦα－ＦｅＸｉａＣｈａｎｇｑｉｎｇ；ＪｉｎＺ... 详细信息

ＴｉＣ－ＰＨＡＳＥＤＩＦＦＵＳＩＯＮＬＡＹＥＲＦＯＲＭＡＴＩＯＮＩＮＴＩＴＡＮＩＵＭＣＬＡＤＳＴＥＥＬＣＯＭＰＯＳＩＴＥＨＡＶＩＮＧＡＮＩＮＴＥＲＭＥＤＩＡＴＥＬＡＹＥＲＯＦα－ＦｅＸｉａＣｈａｎｇｑｉｎｇ；ＪｉｎＺｈａｎｐｅｎｇ（Ｄｅｐａｒｔｍｅｎ...

关键词： TiC-phase carbon activity stationary diffusion

EFFECTS OF TRACE Zr ON FATIGUE CRACK GROWTH RATE OF HIGH DAMPING Zn-Al ALLOY

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中国有色金属学会会刊：英文版 1996年第3期6卷 92-95页

作者： Zhou Shanchu Luo Binghui (department of materials {2. and engineering,Central South university of Technology, Changsha 410083) CENT S UNIV TECHNOL DEPT MAT SCI & ENGNCHANGSHA 410083PEOPLES R CHINA

ＥＦＦＥＣＴＳＯＦＴＲＡＣＥＺｒＯＮＦＡＴＩＧＵＥＣＲＡＣＫＧＲＯＷＴＨＲＡＴＥＯＦＨＩＧＨＤＡＭＰＩＮＧＺｎ－ＡｌＡＬＬＯＹ￥ＺｈｏｕＳｈａｎｃｈｕ；ＬｕｏＢｉｎｇｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓ... 详细信息

ＥＦＦＥＣＴＳＯＦＴＲＡＣＥＺｒＯＮＦＡＴＩＧＵＥＣＲＡＣＫＧＲＯＷＴＨＲＡＴＥＯＦＨＩＧＨＤＡＭＰＩＮＧＺｎ－ＡｌＡＬＬＯＹ￥ＺｈｏｕＳｈａｎｃｈｕ；ＬｕｏＢｉｎｇｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅ...

关键词： Zr Zn-Al alloy fatigue crack growth rate internal friction

STRUCTURE AND PROPERTY OF SINTERED MOLYBDENUM DOPED WITH La_2._3

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中国有色金属学会会刊：英文版 1995年第4期5卷 100-103页

作者： Liu Xinyu Wang Dezhi(department of materials {2. and engineering Central South university of Technology,Changsha 410083) Central South Univ of Technology Changsha China

ＳＴＲＵＣＴＵＲＥＡＮＤＰＲＯＰＥＲＴＹＯＦＳＩＮＴＥＲＥＤＭＯＬＹＢＤＥＮＵＭＤＯＰＥＤＷＩＴＨＬａ_２Ｏ_３ＬｉｕＸｉｎｙｕ；ＷａｎｇＤｅｚｈｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇ... 详细信息

ＳＴＲＵＣＴＵＲＥＡＮＤＰＲＯＰＥＲＴＹＯＦＳＩＮＴＥＲＥＤＭＯＬＹＢＤＥＮＵＭＤＯＰＥＤＷＩＴＨＬａ_２Ｏ_３ＬｉｕＸｉｎｙｕ；ＷａｎｇＤｅｚｈｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇＣｅｎｔｒａｌＳｏ...

关键词： molybdenum La2.3 microstructure mechanical property