多壁碳纳米管改性超高分子量聚乙烯的摩擦学性能  

Tribological Properties of MWNTs Reinforced UHMWPE Composites

作　　者：陈雾[1,2] 段海涛[1,2] 顾卡丽[1,2] 向亚玲[1,2] 商宏飞[3] 李健[1,2] 

机构地区：[1]武汉材料保护研究所,湖北武汉430030 [2]材料表面保护技术湖北省重点实验室,湖北武汉430030 [3]清华大学摩擦学国家重点实验室,北京100084

出　　处：《高分子材料科学与工程》2015年第8期62-67,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51275361);武汉市青年科技晨光计划(2013070104010032)

摘　　要：将多壁碳纳米管(MWNTs)以不同浓度与超高分子量聚乙烯(UHMWPE)粉料共混,通过热模压成型的方法制备MWNTs/UHMWPE复合材料。利用分子动力学模拟对MWNTs/UHMWPE复合材料的粘附机理进行了深入研究,并预测出MWNTs对UHMWPE的摩擦学性能的改性作用;通过摩擦磨损试验系统研究了不同质量分数MWNTs对UHMWPE复合材料摩擦学性能的影响。结果表明:MWNTs可以作为有效填料用以制备UHMWPE复合材料;随着MWNTs含量的增加,MWNTs/UHMWPE复合材料表面硬度有少量增加,摩擦系数的变化并不显著;当MWNTs质量分数为0.3%时,复合材料表现出较小的摩擦系数和优异的抗磨性能。In this work,pristine multi wall carbon nanotubes（ MWNTs） were incorporated into ultra high molecular weight polyethylene（ UHMWPE） at different concentrations. The bulk samples of the MWNTs / UHMWPE composites were prepared by the thermo-compression method. The intermolecular adhesive capacity between MWNTs and UHMWPE was deeply studied by the molecular dynamics simulation,and the reinforced effect of MWNTs on tribological properties of UHMWPE was predicted by the calculation of binding energy. Subsequently the tribological properties of MWNTs /UHMWPE composites were systematically studied by wear test. The results show that the MWNTs were effective filler for preparation of UHMWPE / MWNTs composite. With the increasing of mass fraction of MWNTs,the Shore scleroscope hardness of MWNTs / UHMWPE composites is marginally increased but the variation trend of friction coefficient is not significant. The MWNTs / UHMWPE composite with 0. 3% of MWNTs exhibit smaller friction coefficient and excellent wear resistance.

关 键 词：超高分子量聚乙烯 多壁碳纳米管 分子动力学模拟 摩擦磨损 结合能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]