可反应性纳米SiO2原位改性聚氨酯超疏水表面的摩擦学行为研究

Recently, the superhydrophobic solid surface has drawn a lot of interest. However, the practicality of superhydrophobic surfaces is hampered by the weak mechanically stability and poor wear resistance. In this project, we will investigate the tribology behavior on superhydrophobic polyurethane elastomer which is in-situ modified by reactive SiO2 nanoparticles. The main influence factors and the relationship between the friction loss and the superhydrophobicity will be revealed. The main content is as follows. We will fabricate superhydrophobic SiO2/polyurethane composite elastomer, and investigate the influence of surface morphology and chemical composition on the wettibility during the process of friction. Under different wear conditions, surface abrasion resistance will be influenced by the many changing factors including mechanical properties and chemical composition, which will be studied systematically. Finally, we will reveal the wear mechanism, clarify wear mechanism, and finally establish the wear model for the superhydrophobic materials. The research result will provide theoretical support and practical guidance for the preparation of superhydrophobic materials with strong mechanically durability, which has important theoretical significance and engineering application value.

超疏水表面机械稳定性和耐磨性差是制约其广泛应用和发展的瓶颈。本项目拟以可反应性纳米SiO2原位改性的聚氨酯超疏水表面为研究对象，系统考察不同磨损工况下超疏水表面的摩擦学行为，探索超疏水性丧失及表面摩擦磨损的主要影响因素，揭示二者的关系规律。主要研究内容包括：构建出可反应性纳米SiO2原位改性的聚氨酯弹性超疏水表面；考察摩擦过程中表面形貌和化学成分的变化对浸润性的影响；不同磨损工况下表面微观结构、力学性能以及化学组成等变化因素对磨损性能的影响；揭示超疏水材料表面的磨损机制，阐明磨损机理，建立磨损模型。研究成果将为耐磨超疏水表面的设计制备以及在工业中的应用提供一定的科学借鉴和实际指导。

超疏水表面机械稳定性和耐磨性差是制约其广泛应用和发展的瓶颈。项目组以可反应性纳米二氧化硅改性的聚氨酯超疏水表面为研究对象,通过考察摩擦过程中表面形貌和化学成分的变化对浸润性的影响，讨论了表面微观结构、力学性能以及化学组成等变化因素对磨损性能的影响规律; 探索了超疏水性丧失及表面摩擦磨损的主要影响因素,揭示了二者的关系规律，并且了建立了磨损模型。通过三年的时间，项目组较好的完成了此项目中所要求的各项任务，同时培养了6名研究生，在国际刊物上发表与此相关的SCI论文6篇，申报国家发明专利5件。此项目的顺利完成为长效耐磨超疏水表面的设计制备以及在工业中的应用提供一定的科学借鉴和实际指导，具有重要的理论意义和工程应用价值。