纳米SiC粒子的表面处理对PTFE/纳米SiC复合材料的性能影响  

Effect of Surface Treatment of SiC Nano-particles on Properties of PTFE/Nano SiC Composites

作　　者：顾红艳[1] 丁兰英[1] 

机构地区：[1]南京农业大学工学院,江苏南京210031

出　　处：《中国塑料》2010年第11期58-61,共4页China Plastics

基　　金：高等学校博士学科点专项科研基金项目(20060307002)

摘　　要：对表面处理与未处理纳米SiC填充的聚四氟乙烯(PTFE)复合材料进行力学与摩擦学性能测试,研究了纳米SiC含量和表面处理对复合材料力学和摩擦磨损性能的影响,用扫描电子显微镜对拉伸断面形貌进行观察,探讨了复合材料的增强机理。结果表明,未处理纳米SiC填充PTFE后,复合材料的硬度和耐磨性均有不同程度的提高;表面处理纳米SiC后,PTFE/纳米SiC复合材料的拉伸强度、冲击强度、减摩性能均比未处理的有所提高;表面处理SiC在PTFE基体中有较好的分散性,与PTFE基体界面的结合较好,未处理纳米SiC在PTFE基体中分散性较差。The mechanical and tribological properties of polytetrafluoroethylene （PTFE） composites filled with nano-SiC were studied. The effects of content and surface treatment of nano-SiC on the mechanical, friction, and wear properties of PTFE/nano SiC composites were investigated. The tensile fracture surfaces were observed by a scanning electron microscope （SEM）. The strengthening mechanism for the composites was explored. It showed that the untreated nano-SiC increased the hardness and wear resistance of PTFE/nano SiC composites in varying degrees. The tensile strength, impact strength, and friction properties of the composites were further improved with nano-SiC being treated with a coupling agent. The surface treatment of nano-SiC resulted in a better interface combination with PTFE matrix and thus a finer dispersion.

关 键 词：聚四氟乙烯 纳米碳化硅 表面处理 力学性能 摩擦 磨损 

分 类 号：TB383.1[一般工业技术—材料科学与工程]