中国塑料 ›› 2012, Vol. 26 ›› Issue (08): 45-49 .DOI: 10.19491/j.issn.1001-9278.2012.08.008

• 材料与性能 • 上一篇    下一篇

纳米碳化硅改性聚四氟乙烯复合材料的摩擦磨损性能

路琴 吕少卉 何春霞   

  1. 南京农业大学工学院机械工程系
  • 收稿日期:2012-04-05 修回日期:2012-05-17 出版日期:2012-08-26 发布日期:2012-08-26

Friction and Wear Properties of NanoSiC Modified PTFE Composites

Qin LU Shaohui LV Chunxia HE   

  • Received:2012-04-05 Revised:2012-05-17 Online:2012-08-26 Published:2012-08-26
  • Contact: Qin LU

摘要: 采用不同偶联剂对纳米碳化硅进行表面处理后,制备了聚四氟乙烯/纳米碳化硅复合材料,考察了偶联剂种类和含量随载荷变化对复合材料摩擦磨损性能的影响,并利用扫描电子显微镜观察和分析了复合材料磨损表面形貌及其磨损机理。结果表明,经表面处理的纳米碳化硅填充后的复合材料硬度和摩擦磨损性能均有提高,以钛酸酯偶联剂(NDZ101)处理效果最好;随着偶联剂含量的增大,钛酸酯偶联剂(NDZ101)处理的复合材料的磨损量和摩擦因数均增大,偶联剂最佳含量为填料质量的1 %;偶联剂处理后的纳米碳化硅与基体之间形成了良好的界面,复合材料的磨损以黏着磨损和磨粒磨损为主。

关键词: 聚四氟乙烯, 纳米碳化硅, 偶联剂, 复合材料, 摩擦磨损性能

Abstract: NanoSiC was treated with different coupling agents, the effect of coupling agent content on tribology properties of PTFE composites was investigated. The worn surface of PTFE composites was examined with a scanning electron microscope (SEM). It showed that hardness and tribology properties of PTFE composites filled with treated nanoSiC were higher than those with untreated nanoSiC, and the titanate (NDZ101)was the most effective among various coupling agents. The wear mass loss and friction coefficient of PTFE composites decreased with increasing coupling agent, however, the effect was inversed when the loading of coupling agent was larger than 1 %. SEM micrograph of fracture surface revealed that there was favorable interface bonding between NDZ101 treated nanoSiC and PTFE matrix. The wear mechanism of PTFE composites was also discussed.

Key words: PTFE, nanosilicon carbide, coupling agent, composite, friction and wear property