现有的类金刚石碳、硫化钼等固体润滑剂在高温等极端工况下难以适用，石墨烯已被证实具有纳米尺度下超润滑特性及高温惰性，被认为是未来最有潜力的固体润滑材料之一。然而实际工况下零部件接触面积远大于纳米尺度且目前石墨烯润滑膜易损耗，如何制备成形大面积高性能润滑膜仍是制约其应用的瓶颈。基于已有研究，石墨烯层间结构和层间作用力被认为是影响润滑性能的关键因素。.因此，本项目首先借助模拟仿真研究石墨烯层间作用力对润滑性能的影响规律和润滑机理；在此基础上利用化学改性调控石墨烯层间作用力，并提出电磁辅助成形大面积润滑膜新工艺，利用石墨烯磁化极化效应和电磁场均匀连续性控制石墨烯取向和均匀连续分布；试图制造出兼具均匀连续取向的层间结构且层间作用力可控的石墨烯润滑膜；最后通过高温实验测试验证石墨烯润滑膜成形工艺和润滑机理。项目成功后，可为高性能石墨烯润滑膜加工成形提供一种可行途径，对高温等极端工况下润滑具有重要意义。

Existing solid lubricants such as diamond-like carbon and MoS2 are hard to be applied in harsh working conditions such as high temperature, etc. Graphene has been proved to have nano-scale super-lubricating property and good high-temperature stability; hence, it is considered as one of the most promising solid lubricants in future. However, the contact area of frictional parts is much larger than nanometers, and the graphene lubrication film is easily worn out after a long service. How to process a large-area high-performance graphene lubricating film is the key issue for its application. In many past studies, the graphene lubrication performance was shown to strongly depend on the interlayer structure and interactions..Here, in this project the influence of graphene interlayer interaction on the tribological behavior will be firstly studied by simulation to unveil the lubrication mechanism. Next, based on the simulation results, chemical modification of graphene sheets will be adopted to control the interlayer interaction. Then, a new electromagnetic-field assisted fabrication method will be used to fabricate large area graphene lubrication film, in which graphene orientation and distribution can be controlled depending on the graphene magnetization/polarization and uniform property of the electromagnetic field. Thus a large graphene lubricating film with a uniform, continuous and orientated interlayer structure and tailored interlayer interaction will be obtained; Finally, characterization and high-temperature friction tests will be conducted to verify the film structure and lubrication mechanism. If the project succeeds, it will provide a feasible way for fabricating high-performance graphene lubrication films under extreme servicing conditions, such as high temperature