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Development and Characterization of Multi-Scale Carbon Reinforced PPS Composites for Tribological Applications

Division of Machine Elements, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden
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Lubricants 2019, 7(4), 34; https://doi.org/10.3390/lubricants7040034
Received: 29 March 2019 / Revised: 6 April 2019 / Accepted: 8 April 2019 / Published: 10 April 2019
Polymer-based materials show to be of increasing interest in replacing metal based materials in tribological applications due to their low weight, cost and easy manufacturability. To further reduce the environmental impact of these bearing materials recyclability is becoming more crucial, stimulating the need for high performing thermoplastic materials. In this study, polyphenylene sulfide (PPS) composites were prepared in an effort to enhance its tribological properties. Short carbon fibres (SCFs), graphene oxide (GO) and nano diamonds (NDs) as well as polytetrafluoroethylene (PTFE) were used as micro and nano reinforcements. The addition of SCFs especially decreased the linear coefficient of thermal expansions while enhancing the micro hardness and wettability of the polymer. Under water lubricated conditions, a decrease in friction up to 56% and a reduction of wear rate in the order of 103 was observed by the addition of SCF. The reduction in friction and wear was further enhanced by the addition of NDs, providing a synergistic effect of the reinforcements in micro and nano scale. By testing the individual reinforcements under dry conditions, PTFE and SCFs were especially effective in reducing friction while the release and consequent abrasion of NDs and SCFs increased the wear under a higher contact pressure. View Full-Text
Keywords: PPS; short carbon fiber; nanocomposites; PTFE; wear; friction PPS; short carbon fiber; nanocomposites; PTFE; wear; friction
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MDPI and ACS Style

Jain, A.; Somberg, J.; Emami, N. Development and Characterization of Multi-Scale Carbon Reinforced PPS Composites for Tribological Applications. Lubricants 2019, 7, 34.

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