固-液复合润滑是提高未来空间运动部件服役寿命和可靠性的主要手段，然而对不同固-液复合润滑体系的摩擦相异性、表界面的吸附与转移行为及典型环境对其的影响规律尚未充分的认识。本项目在前期研究工作基础上拟通过分析WS2基固体薄膜与PFPE和P201复合后的摩擦相异性，找出相异性的影响因素，通过合理设计，制备具有协同效应的固-液体复合润滑体系，实现润滑与耐磨的统一。研究固-液复合润滑体系在摩擦过程中的表界面吸附与转移行为及空间环境因素对其的影响，揭示复合润滑体系表界面摩擦吸附与转移的科学本质，提出模拟空间环境因素对其吸附与转移行为的影响机制及其与润滑失效的关系规律，实现对复合润滑体系中摩擦相异性及表界面行为的调控，发展具有协同效应的空间用延寿固-液复合润滑材料与技术。上述研究结果将为满足我国空间有效载荷12～20年的润滑寿命提供理论基础和技术保障，并将大幅度提升我国未来空间润滑材料与技术的能力。

Solid-liquid composite lubrication is the main solutions to improve the life and reliability of space moving parts in the future. However, there are many essential differences in lubrication performance between different solid-liquid composite systems. Based on the previous research work,this project intends to disclose the scientific nature of the disparate mechanism of WS2/PFPE and WS2/P201 solid-liquid composite lubrication systems in simulated space conditions. By designing synergistic solid-liquid composite lubrication systems, some new materials and technologies for guarantee of prolonged service life will be developed. The project will study: i) relationship between lubrication and surface/interface behaviors on the tribological surface of WS2 based solid-liquid composite lubrication system; ii) effect of simulation space environment on tribological properties and lubricant-transfer behavior of WS2 based solid-liquid composite lubrication system. We expect the fllowing significant beneficial outcomes from this proposal: i) deeper understanding of the scientific nature of absorption and transfer behaviors on the tribological interface of solid-liquid composite system; ii）propose the impact mechanism between simulated space environment and lubrication performance; iii) supply of the theoretical basis and technical support for developing solid-liquid lubrication systems that can serve for 12-20 years under effective loads in space conditions, and dramatically enhance the ability to develop materials and technologies that can be used for lubricating our future space machines.