纳米碳黑与纳米石墨填充PTFE复合材料摩擦磨损性能比较研究  

Study on Tribological Properties of PTFE Composite Filled with Nano-carbon Black and Nano-graphite

作　　者：何春霞[1] 万芳新[1] 张静[1] 路琴[1] 

机构地区：[1]南京农业大学工学院,江苏南京210031

出　　处：《润滑与密封》2008年第12期49-51,共3页Lubrication Engineering

基　　金：江苏省自然科学基金项目(BK2004103);高等学校博士学科点专项科研基金项目(20060307002)

摘　　要：用M-2000摩擦磨损试验机对纳米碳黑和石墨填充PTFE复合材料进行了摩擦磨损性能研究,用扫描电子显微镜(SEM)对磨损表面进行观察。结果表明:2种碳纳米能够提高PTFE复合材料的耐磨性,其中纳米碳黑填充效果最佳。纳米碳黑和纳米石墨2种碳纳米的最佳添加量分别为7%和5%(质量分数)。纳米石墨可以减小PTFE复合材料的摩擦因数,而纳米碳黑使得PTFE复合材料的摩擦因数增大,且含量越高,复合材料摩擦因数增幅越大。结晶型纳米石墨与PTFE基体的相容性较差,而无定形纳米碳黑与PTFE基体的相容性较好。The tribological properties of PTFE composites filled with nano-carbon black and nano-graphite were investigated by M-2000 wear tester. The worn surfaces of PTFE composites were examined through scanning electric microscopy （SEM）. The results show that the properties of anti-wear for PTFE composites are improved when two kinds of nano carbon materials were filled in, and the nano-carbon black is the best filler. The more suitable filler content for PTFE composites is respectively 7% nano-carbon black and 5% nano-graphite. Nano-graphite can reduce the friction coefficient, but nano-car- bon black can increase the friction coefficient of PTFE composites especially when the content of filler is increased. The crystalline nano - graphite has poor compatibility with PTFE and the noncrystalline nano-carbon black has better compati- bility with PTFE.

关 键 词：碳纳米材料 复合材料 摩擦磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]