薄膜润滑与纳米流变学研究的进展

综述了薄膜润滑和纳米流变学最新研究成果及其对宏观摩擦学的贡献。当润滑膜厚度接近分子尺度时，润滑剂的流变性质和物理状态将经历很大的变化，包括有序结构形成，等效粘度增加，松驰过程减缓，固化或玻璃态转化以及由此产生的粘滑运动。说明在弹流和边界润滑之间可能存在一种特殊的薄膜润滑状态，即润滑剂的流动及流体动力效应依然存在，但其行为已大大不同于经典理论所预测的规律。目前有关薄膜润滑的理论尚在发展之中，它将为高技术微系统的开发，实现摩擦控制和界面设计提供理论基础。

Recent progress in thin film lubrication and nano rheology

Recent progress in nano rheology and thin film lubrication, as well as their contributions to conventional tribology are summarized. As the lubricating film becomes molecularly thin, the confined lubricant undergoes a dramatic transition in its theological properties and physical state, including the formation of ordered structure, enhanced viscosity and slow relaxation, glass transition or solidification, and stick slip motion. The transition indicates that there is a special regime between EHL and boundary lubrication, identified as thin film lubrication, where lubricant flow and hydrodynamics are still in action but behave differently from expectations of the classical theory. Microscopic studies of thin film lubrication will provide a solid theoretical basis to the development of high tech micro devices, friction control and interface design.