Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 129, Issue 4, Pages 2321-2327Publisher
WILEY
DOI: 10.1002/app.38955
Keywords
composites; friction; wear and lubrication; porous
Categories
Funding
- National Natural Science Foundation of China [50903010, 51175066]
- New Century Excellent Talent [1251-NCET-007]
- National Doctor Foundation [20110490114]
- National Young Top Talents Plan of China
- New Century Excellent Talents in University
- FANEDD [201164]
- [gg1203]
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Nano-micro hierarchical porous polyphenylene sulfide/polytetrafluoroethylene (PPS/PTFE) composites were prepared by mold-leaching and vacuum melting process under high temperature condition. The tribological behaviors of porous PPS/PTFE composites and the synergism as a result of incorporation of both micro-porogen (NaCl) and mesoporous TiO2 whiskers were investigated. The effects of mesoporous TiO2 whiskers and nonperforated TiO2 whiskers on the friction and wear properties of PPS/PTFE composites were comparatively studied, respectively. Results indicated that the wear rate of porous PPS/PTFE composites with 30 wt % NaCl and 7 wt % mesoporous TiO2 whiskers obtained the lowest values under the load of 100 N. Compared with pure PPS, the wear resistance of nano-micro porous PPS/PTFE composite was enhanced by 6.45 x 103 times, showing outstanding wear resistance. During sliding condition, grease could be squeezed through the nano-micro pores under the coupling effect of load and friction heat, and formed a lubricanting layer on friction surface, providing self-lubricating effect and high wear resistance. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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