自然界中的动物和植物经过45亿年长期的进化使其结构与功能达到近乎完美的程度,实现了结构与功能的统一。黏附材料在生物医学、建筑等领域都具有重要的应用价值。受自然界中具有优异黏附特性的生物材料启发(如壁虎、贻贝等),国内外许多课题组相继开展了仿生黏附材料的研究。根据黏附机理的不同,黏附材料大致可分为可逆黏附和永久黏附两大类。壁虎的可逆黏附是基于其脚趾多尺度微纳结构与接触面间的范德华力,贻贝的永久黏附则源自其分泌的黏附蛋白。本文就壁虎、贻贝及其他生物黏附材料的黏附机理及其相应仿生黏附材料的国内外研究现状进行简要的综述,并对该领域未来的发展方向作了展望。
After four and a half billion year evolution, creatures in nature possess almost perfect structures and properties, exhibiting the harmonization and unification between structure and function. Adhesive materials have a wide variety of practical applications in biomedical sciences, construction industry, and other fields. Inspired by biomaterials (such as gecko, mussel) with the special adhesive property, great effort has been devoted to fabricating bio-inspired adhesive materials. According to the adhesive mechanism, adhesive materials can be classified in two categories, reversible adhesion and permanent adhesion. For the gecko, the reversible adhesion can be attributed to the cooperation of micro/nano hierarchical structures of gecko toes and van der Waal' s force between solid surfaces and keratinous setae. For the mussel, the glue proteins secreted by marine mussels can bind strongly to all inorganic and organic surfaces in aqueous environments. This review summarizes the recent work in biomaterials with special adhesion and the corresponding bio-inspired adhesive materials, with a focus on the gecko and mussel. The research prospects and directions of bio-inspired adhesive materials in the future are also briefly addressed.