Perfluoropolyether (PFPE) is an excellent high-temperature lubricant; however, its poor affinity with additives such as MoS₂, a common high-temperature lubricant additive, often leads to agglomeration and settling during storage, thereby reducing its tribological performance. To address this challenge, this study investigates the chemical grafting of MoS₂ using Trimethoxy (1H,1H,2H,2H-perfluorodecyl) silane (TMFS), achieving stable MoS₂ dispersion in PFPE that remains effective for up to 180 days. The grafted MoS₂ exhibits remarkable thermal stability, maintaining its integrity without decomposition even at temperatures reaching 250 °C. Compared with pure PFPE, the modified lubricant demonstrates a remarkably 36.8 % reduction in coefficient of friction and an 81.6 % decrease in wear rate at 200 °C. This research provides crucial theoretical insights and practical guidance for the future design of high-performance high-temperature lubrication systems.

中文翻译：

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TMFS 改性 MoS2 增强 PFPE 在高温条件下的润滑性能


全氟聚醚 （PFPE） 是一种优良的高温润滑剂;然而，它与常见的高温润滑剂添加剂 MoS₂ 等添加剂的亲和力差，在储存过程中往往会导致团聚和沉降，从而降低其摩擦学性能。为了应对这一挑战，本研究研究了使用三甲氧基（1H、1H、2H、2H-全氟癸基）硅烷 （TMFS） 对 MoS₂ 进行化学接枝，在 PFPE 中实现了稳定的 MoS₂ 分散，有效期长达 180 天。接枝的 MoS₂ 表现出卓越的热稳定性，即使在高达 250 °C 的温度下也能保持其完整性而不会分解。 与纯 PFPE 相比，改性润滑剂在 200 °C 时的摩擦系数显著降低了 36.8%，磨损率降低了 81.6%。 本研究为未来高性能高温润滑系统的设计提供了重要的理论见解和实践指导。