纳米粒子和聚四氟乙烯填充UHMWPE复合材料的摩擦磨损性能研究  

Friction and Wear Behavior of Nano-particulates and Polytetrafluoroethylene Filled Ultra High Molecular Weight Polyethylene Composites

作　　者：雷毅[1] 郭建良[1] 

机构地区：[1]中国石油大学机电工程学院,山东东营257061

出　　处：《润滑与密封》2007年第5期23-26,共4页Lubrication Engineering

基　　金：中国石油天然气集团公司石油科技中青年创新基金资助项目(W020311);中国石油大学(华东)创新基金资助项目(S2005-64).

摘　　要：以纳米氧化锌（ZnO）和纳米蒙脱土（MMT）及聚四氟乙烯（PTFE）作为复合填料，通过热压成型工艺制备了纳米ZnO-MMT及PTFE填充超高分子量聚乙烯（UHMWPE）复合材料，采用销-盘式摩擦磨损试验机考察了纳米粒子对复合材料摩擦磨损性能的影响，用扫描电子显微镜观察了复合材料磨损表面形貌。结果表明：当PTFE和MMT的填充量均保持为质量分数6％，填充纳米ZnO质量分数为4%-6％时的复合材料可获得较好的摩擦磨损性能，与不含纳米ZnO的复合材料相比，其摩擦因数最低下降了11．1％，而磨损率下降了83．3％。当复合填料中纳米ZnO含量较低时，复合材料的磨损机制主要表现为不同程度的粘着磨损，但当复合填料中纳米ZnO含量较高时，复合材料的磨损机制主要表现不同程度的粘着磨损和磨粒磨损．同时其复合材料的摩檫磨损性能出现了恶化现象。Ultra high molecular weight polyethylene （UHMWPE） based composites filled with nanometer ZnO, nanometer montmorillonite （MMT） and polytetrafluoroethylene （PTFE） were prepared by heat compression molding. The influ- ences of nano-particulates on the friction and wear behavior of the composites were investigated on a pin-on-disc test rig. The worn surfaces of the composites were observed on a scanning electron microscope. It is found that when the mass fraction of PTFE and nanometer MMT both is fixed at 6% , the composites filled with 4%-6% nano-ZnO obtain better friction and wear properties. Compared with composites filled with no nanometer ZnO particles, its friction coefficient reduces 11.1% ,while its wear rate decreases 83.3%. When the mass fraction of nano-ZnO in the compounded fillers is low,the main wear mechanisms of the composites are characterized by cohesive wear in varying degrees. When the mass fraction of nano-ZnO is high, the main wear mechanisms of the composites are characterized by cohesive wear and abrasive wear in varying degrees,and the friction and wear properties of the composites are dereriorated.

关 键 词：超高分子量聚乙烯 纳米氧化锌 纳米蒙脱土 聚四氟乙烯 摩擦磨损性能 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TH117.3[机械工程—机械设计及理论]