纳米SiC粒子的表面处理对PTFE/纳米SiC复合材料的性能影响

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，其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。

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

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 composites were investigated. The tensile fracture surfaces were observed by a scanning electron microscope (SEM). The strengthen mechanism for the composites was explored. It showed that the untreated nano-SiC increased the hardness and wear resistance of PTFE composites in varying degrees. The tensile strength, impact strength, and friction properties of composites were further improved with the 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.