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<p>To address the poor mechanical performance and improve the tribological properties of self-lubricating polyphenylene sulfide/irradiation treated polytetrafluoroethylene (PPS/i-PTFE) blends, different aspect ratio carbon fibers (<i>i.e.</i>, PSCF: 50, SCF: about 429) were introduced as reinforcement fillers. The results showed that the hybriding of PSCF and SCF at certain mass ratios exhibited simultaneous enhancement of mechanical and tribological performance for PPS/i-PTFE blend through the construction of synergistic lubrication and mechanical interlocking network. Specifically, the flexural strength and modulus of PPS/i-PTFE were increased by 125.6% and 389.3%, the friction coefficient and specific wear rate were decreased by 13.9% and 95%, respectively. It was worth noting that PPS composites possessed excellent integrated performance which were able to withstand sliding action under high PV (≥10 MPa·m/s) conditions, as assessed by a customized pin-on-disc tester. This work demonstrated that the formation of intact lubricating film combined with the enhanced thermal and mechanical properties were favorable for improving the tribological properties of PPS-based composites, which makes them suitable for advanced engineering applications.</p>

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Fabrication of Mechanically Robust Self-lubricating Polyphenylene Sulfide Composites for High PV (Pressure × Velocity) Applications

  • 期刊论文

  • 发表日期：

    2026年1月4日

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  • Ji-Xiang Li,
  • Mei Liang,
  • Xiao-Wen Zhao,
  • Sheng-Tai Zhou,
  • Hua-Wei Zou

摘要

To address the poor mechanical performance and improve the tribological properties of self-lubricating polyphenylene sulfide/irradiation treated polytetrafluoroethylene (PPS/i-PTFE) blends, different aspect ratio carbon fibers (i.e., PSCF: 50, SCF: about 429) were introduced as reinforcement fillers. The results showed that the hybriding of PSCF and SCF at certain mass ratios exhibited simultaneous enhancement of mechanical and tribological performance for PPS/i-PTFE blend through the construction of synergistic lubrication and mechanical interlocking network. Specifically, the flexural strength and modulus of PPS/i-PTFE were increased by 125.6% and 389.3%, the friction coefficient and specific wear rate were decreased by 13.9% and 95%, respectively. It was worth noting that PPS composites possessed excellent integrated performance which were able to withstand sliding action under high PV (≥10 MPa·m/s) conditions, as assessed by a customized pin-on-disc tester. This work demonstrated that the formation of intact lubricating film combined with the enhanced thermal and mechanical properties were favorable for improving the tribological properties of PPS-based composites, which makes them suitable for advanced engineering applications.