Water-based lubricants with graphene have excellent lubrication behaviors, but the synergistic mechanism involving the activities of both water and graphene isblue still unclear. This work investigates such mechanism by considering the effect of different factors such as the number of water molecules, loading, surface roughness and sliding velocity via molecular dynamics simulation. It is found that the friction reduction by water-based lubricants is due to the enhanced isolation between friction pairs by the graphene presence and the improvement of water replenishment. The synergistic lubrication mechanism works as that the water molecules may protect the structural integrity of graphene by inducing its movement to release lateral stresses and the graphene can enhance the movement of water molecules and promote their rolling like bearings.

含有石墨烯的水性润滑剂具有优异的润滑性能，但涉及水和石墨烯活性的协同机制仍不清楚。这项工作通过分子动力学模拟考虑水分子数量、载荷、表面粗糙度和滑动速度等不同因素的影响来研究这种机制。研究发现，水基润滑剂的摩擦减少是由于石墨烯的存在增强了摩擦副之间的隔离和补水的改善。协同润滑机制的作用是，水分子可以通过诱导石墨烯运动释放侧向应力来保护石墨烯的结构完整性，石墨烯可以增强水分子的运动并促进其像轴承一样滚动。