Minimizing friction and wear remains a big challenge for mechanical mobility systems and energy saving. We demonstrate that a remarkable synergistic lubrication effect could be induced with a novel “soft” and “hard” polysiloxane (PS)/TiCT nanocomposite coating and the industrial PAO4 lubricant oil, with the lowest friction of 0.01 together with negligible wear achieved for PS/TiCT-400. Careful investigation of the friction surface for PS/TiCT-400 indicates that a mated surface topology, enhanced boundary lubrication filming-forming ability, and local accumulation of TiCT MXene nanoflakes could be induced at the interface, which creates desirable synergistic lubrication effects to not only effectively separate the mating surfaces and prevent the direct asperity contacts, but also form in-situ shearing layers to play a positive role in friction reduction. Furthermore, the surface hardening effect could also be observed on the PS/TiCT-400 coating surface, with pyridinic N transformed into robust pyrrolic N. It could be expected that the results of this work would play a catalytic role in the promotion of superlubricity in the future engineering applications.

中文翻译：

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利用聚硅氧烷/Ti3C2TX纳米复合薄膜和聚α烯烃油实现超低摩擦和磨损

最大限度地减少摩擦和磨损仍然是机械移动系统和节能的一大挑战。我们证明，新型“软”和“硬”聚硅氧烷（PS）/TiCT 纳米复合涂层和工业 PAO4 润滑油可以产生显着的协同润滑效果，PS/ 的摩擦系数最低为 0.01，磨损可忽略不计。 TiCT-400。对 PS/TiCT-400 摩擦表面的仔细研究表明，可以在界面处诱导配合表面拓扑、增强的边界润滑成膜能力以及 TiCT MXene 纳米片的局部积累，从而产生理想的协同润滑效果，不仅有效分离配合面，防止直接粗糙接触，还能形成原位剪切层，起到积极的减摩作用。此外，在PS/TiCT-400涂层表面也可以观察到表面硬化效应，吡啶N转化为坚固的吡咯N。可以预期这项工作的结果将对促进超润滑性起到催化作用。未来的工程应用。