壁虎类生物的黏附系统不仅拥有超强黏附能力，同时具有优越的自清洁功能。如何协调这两个看似矛盾的力学现象目前还鲜有探索。本项目旨在通过系统的实验和理论研究，揭示生物黏附系统的自清洁机理，给出自清洁与强黏附耦合协调的物理关联。首先，系统开展生物及仿生表面在不同环境及不同基底上的黏附实验，实时在位观察及对比黏附界面的静态和动态力学行为；其次，建立与实验相应的理论模型，系统分析加载方式、结构的多级特性、微结构尺寸及表面效应对黏附表面动态响应及自清洁功能的影响，揭示壁虎类生物黏附系统及仿生表面的自清洁力学机理；最后应用多尺度力学方法，综合分析表面自清洁和表面黏附协调统一的关键因素，结合已有对壁虎类生物宏微观黏附机制的研究成果，全面理解壁虎类生物同时实现自清洁和强黏附的优异策略。研究成果能为多次重复使用的新型智能黏附材料及仿生爬壁机器人黏附系统的设计提供理论指导，并能推进仿生力学和表/界面力学的发展。

It is known that the adhesion systems of gecko-like creatures have not only strong attachment but also superior self-cleaning ability. But how to coordinate the two mechanics phenomena which seems contradict with each other has not been studied till now. The main motivation of the present project is to disclose the self-cleaning mechanism of the biological adhesion system and clarify the coupling relationship between the self-cleaning and strong attachment behaviors by systematically experimental and theoretical investigations. Firstly, experiments of biological and bio-inspired surfaces adhering on different substrates and in different environments are carried out systematically. The static and dynamic mechanics behaviors of the adhesive interface are observed and compared in situ. Secondly, according to the experiments, theoretical models are established to disclose the self-cleaning mechanism of biological and bio-inspired adhesion system by considering the effects of loading mode, hierarchical structure, as well as size and surface effects of the micro-structures, on the dynamic response and self-cleaning mechanism. Finally, the multi-scale mechanics method is adopted to analyze the factors that influence the unification of the surface self-cleaning and strong attachment. Combining the existing studies on the macro- and micro-adhesion mechanism of gecko, we can deeply understand the excellent strategy of gecko-like creatures that can achieve the self-cleaning and strong attachment mechanisms simultaneously. The derived results of the present project can not only provide theoretical foundation for the design of the reusable advanced synthetic adhesives and the adhesion system of bio-inspired micro-climbing robots, but also is useful for the development of biomimetic mechanics and surface/interface mechanics.