The effect of surface modification on the friction and wear behavior of carbon nanofiber-filled PTFE composites

Yijun Shi, Xin Feng, Huaiyuan Wang, Xiaohua Lu

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Carbon nanofiber (CNF) was treated with HNO3, coupling agent and HNO3 followed by coupling agent, respectively. The friction and wear properties of surface-treated CNF were investigated on a ring-on-ring friction and wear tester under dry friction conditions. Scanning electron microscopy (SEM) was utilized to study the worn surfaces of PTFE composites. Experimental results showed that surface modification decreased the friction coefficient of CNF/PTFE composites slightly, and reduced the wear volume loss of the PTFE composites obviously. Among all HNO3 treatments, 10 min treatment was the best for the improvement of anti-wear properties of PTFE composites. Moreover, the best anti-wear property of the composite was achieved when CNF was treated with HNO3 followed by coupling agent treatment, which was about 30% lower than that of untreated CNF filled PTFE under 200 N load. SEM studies indicated that surface modification could reduce the abrasive wear of CNF/PTFE composites. And the dispersion of CNF in PTFE composites was also improved after the surface modification, especially for the treatment of HNO3 followed by coupling agent.

Original languageEnglish
Pages (from-to)934-939
Number of pages6
JournalWear
Volume264
Issue number11-12
DOIs
StatePublished - 10 May 2008

Keywords

  • Carbon nanofiber
  • Composites
  • Friction
  • PTFE
  • Surface modification
  • Wear

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