Abstract Graphene and modified graphene can provide exceptional lubrication when used as additives. Here, we applied several types of graphene on steel tribo-couples to perform friction tests. The results indicate that the solution concentration and processing method regarding the graphene-containing alcohol solution can significantly affect the lubrication performance. Graphene nanoflakes aggregated on the sliding interfaces and underwent structural transformation under high contact pressure after the alcohol completely evaporated. The wear track and wear scar were then effectively protected by the in situ as-formed tribolayer. In contrast, a tribolayer could not form when the tribo-couples slid in a solution environment, as the graphene adsorbed on the contact area could be removed away by the alcohol.

中文翻译：

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石墨烯和改性石墨烯纳米薄片在潮湿空气中滑动钢表面的纳米结构摩擦层依赖性润滑性

摘要 石墨烯和改性石墨烯作为添加剂使用时可以提供出色的润滑效果。在这里，我们在钢摩擦偶上应用了几种类型的石墨烯来进行摩擦测试。结果表明，含石墨烯醇溶液的溶液浓度和处理方法对润滑性能有显着影响。石墨烯纳米薄片聚集在滑动界面上，并在酒精完全蒸发后在高接触压力下发生结构转变。磨损痕迹和磨损疤痕然后被原位形成的摩擦层有效地保护。相比之下，当摩擦对在溶液环境中滑动时，摩擦层无法形成，因为吸附在接触区域上的石墨烯可以被酒精去除。