微纳织构化黏附性超疏水表面的水润滑摩擦学性能及相关关系规律研究

Because of low viscosity and the difficulty in forming the lubrication film in the process of friction, green water-based lubricant has been limited in actual application. Adhesive superhydrophobic surfaces not only can adsorp water droplets, but also help to keep water film and moisturize the base material, which would be advantageous in enhancing and maintaining the lubrication performance for a long term. For this reason, the adhesion property between water-based lubricant and the superhydrophobic surface is closely related to its tribological property in water lubrication. In the project, we will make a systematic study of the tribological property in water lubrication of the adhesive superhydrophobic surfaces and the relationship between the adhesion property of superhydrophobic surfaces and their tribological property in water lubrication. The main research contents are as follows. Firstly, adhesive superhydrophobic surface with micro-nano textured structure will be constructed. Secondly, the adhesion behaviour and action mechanism between water-based lubricant and superhydrophobic surfaces will be studied. Thirdly, the tribological property in water lubrication of superhydrophobic engineering surface will be discussed in elastohydrodynamic lubrication and boundary lubrication state, respectively. Finally, the relationship between the adhesion property of superhydrophobic surfaces and their tribological property in water lubrication will be analyzed. And long-term stable superhydrophobic surfaces with wear resistance and good lubrication will be obtained. The research results will make us gain new perspectives on the adherence principle of superhydrophobic surfaces, as well as help to provide important theoretical support and practical application for the fabrication of superhydrophobic surfaces with long service life and wear resistance.

绿色环保的水基润滑剂由于粘性较低，摩擦过程中较难形成润滑薄膜，在实际使用中受到了限制。黏附性超疏水表面既可以吸附水滴，又有利于水膜的保持和基材的保湿，这对于润滑性能的增强和长效保持具有重要的意义。因此，水基润滑剂与超疏水表面之间的黏附性与其水润滑摩擦学性能密切相关。本项目拟以黏附性超疏水表面为研究对象，深入研究黏附性超疏水表面的水润滑摩擦学性能以及黏附性与其摩擦学性能的的关系规律。主要研究内容：构筑微纳织构化黏附性超疏水表面；研究黏附性超疏水材料表面的干摩擦和水润滑摩擦学性能；在弹流润滑和边界润滑两种状态下研究超疏水材料表面的水润滑摩擦学性能；探讨并揭示超疏水表面黏附性能与其水润滑摩擦学性能的关系规律；最终获得耐摩擦和润滑性能良好的长效稳定的超疏水表面。该研究将对超疏水表面材料黏附性理论的应用有新的认识，对长寿命、耐摩擦、润滑性能良好的超疏水材料的设计制备具有重要的理论指导意义和应用价值。

关于超疏水表面摩擦学性能的研究比较多，但是关于超疏水表面水润滑摩擦学性能的研究比较少。而对不同黏附性能的超疏水表面进行摩擦学性能分析和研究却鲜有报道。本项目研究制备了多种具有不同黏附性能的织构化超疏水表面，并对其干摩擦和水润滑摩擦学性能进行了研究，最后对超疏水表面黏附性与其摩擦学性能的关系规律进行分析，以期获得了润滑性能良好的长寿命耐磨超疏水表面。研究结果表明，超疏水表面的黏附性能对其摩擦学性能有重要的影响。黏附性和滚动性的超疏水表面具有不同的干摩擦和水润滑摩擦学性能，两者性能的优劣与微纳米织构的强度和微观形貌有重要的关系，耐磨的织构和便于储存磨屑的凹坑结构有利于呈现出较低的摩擦系数和耐磨的性能。项目研究成果使人们对超疏水表面的摩擦学性能有新的认识。项目共发表标注资助学术论文3篇，培养硕士生2人。