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Superlubricity achieved with two-dimensional nano-additives to liquid lubricants
Friction ( IF 6.3 ) Pub Date : 2020-07-23 , DOI: 10.1007/s40544-020-0410-3
Hongdong Wang , Yuhong Liu

The topic of superlubricity is attracting considerable interest around the world while humanity is facing an energy crisis. Since various liquid superlubricity systems can be commonly achieved on the macroscale in ambient conditions, it is considered an effective solution to reduce unnecessary energy and material losses. However, certain practical problems such as low load-bearing pressure, dependence on hydrogen ions, and relatively long running-in processes still limit its widespread application. Two-dimensional (2D) nano-additives with ultrathin longitudinal dimensions can lower the shear resistance between sliding solid surfaces, and thus further optimize the applied conditions. In this review, the latest studies on 2D nano-additives with a combination of various water-based lubricants in the state of superlubricity are reported, typically including black phosphorus (BP), graphene oxide (GO), and layered double hydroxide. During the sliding process, composite lubricants effectively improved the load capacity (up to 600 MPa), reduced wear, and accelerated the running-in period (within 1,000 s) of the liquid superlubricity system. Both macromechanical experiments and microscopic tests are conducted to precisely analyze various interactions at the interfaces of the nano-additives and solid surfaces. These interactions can be described as tribochemical reactions, physical protection, and adsorption enhancement, and improved wear resistance. This review provides better guidance for applying 2D nanomaterials in liquid superlubricity systems.

中文翻译:

使用二维纳米添加剂添加到液体润滑剂中可获得超润滑性

当人类正面临能源危机时,超级润滑这一话题在世界范围内引起了极大的兴趣。由于各种液体超润滑系统通常可以在环境条件下在宏观上实现,因此被认为是减少不必要的能量和材料损失的有效解决方案。但是,某些实际问题,例如较低的承载压力,对氢离子的依赖性以及相对较长的磨合过程仍然限制了其广泛的应用。具有超薄纵向尺寸的二维(2D)纳米添加剂可以降低滑动固体表面之间的抗剪强度,从而进一步优化应用条件。在这篇评论中,报告了关于在超润滑状态下结合各种水性润滑剂的二维纳米添加剂的最新研究,通常包括黑磷(BP),氧化石墨烯(GO)和层状双氢氧化物。在滑动过程中,复合润滑剂有效地提高了负载能力(最高600 MPa),减少了磨损并加快了液体超润滑系统的磨合期(1,000 s之内)。进行了宏观力学实验和微观测试,以精确分析纳米添加剂与固体表面的界面处的各种相互作用。这些相互作用可以描述为摩擦化学反应,物理保护和吸附增强以及提高的耐磨性。这篇综述为在液体超润滑系统中应用二维纳米材料提供了更好的指导。复合润滑剂有效地提高了负载能力(最高600 MPa),减少了磨损并加快了液体超润滑系统的磨合期(1,000 s之内)。进行了宏观力学实验和微观测试,以精确分析纳米添加剂与固体表面的界面处的各种相互作用。这些相互作用可以描述为摩擦化学反应,物理保护和吸附增强以及提高的耐磨性。这篇综述为在液体超润滑系统中应用二维纳米材料提供了更好的指导。复合润滑剂有效地提高了负载能力(最高600 MPa),减少了磨损并加快了液体超润滑系统的磨合期(1,000 s之内)。进行了宏观力学实验和微观测试,以精确分析纳米添加剂与固体表面的界面处的各种相互作用。这些相互作用可以描述为摩擦化学反应,物理保护和吸附增强以及提高的耐磨性。这篇综述为在液体超润滑系统中应用二维纳米材料提供了更好的指导。进行了宏观力学实验和微观测试,以精确分析纳米添加剂与固体表面的界面处的各种相互作用。这些相互作用可以描述为摩擦化学反应,物理保护和吸附增强以及提高的耐磨性。这篇综述为在液体超润滑系统中应用二维纳米材料提供了更好的指导。进行了宏观力学实验和微观测试,以精确分析纳米添加剂与固体表面的界面处的各种相互作用。这些相互作用可以描述为摩擦化学反应,物理保护和吸附增强以及提高的耐磨性。这篇综述为在液体超润滑系统中应用二维纳米材料提供了更好的指导。
更新日期:2020-07-23
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