Zhang Pengchao, Zhao Chuangqi, Zhao Tianyi, Liu Mingjie, Jiang Lei
Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beihang University Beijing 100191 P. R. China.
International Research Institute for Multidisciplinary Science and Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing 100191 P. R. China.
Adv Sci (Weinh). 2019 Jul 22;6(18):1900996. doi: 10.1002/advs.201900996. eCollection 2019 Sep 18.
Engineering surface wettability is of great importance in academic research and practical applications. The exploration of hydrogel-based natural surfaces with superior properties has revealed new design principles of surface superwettability. Gels are composed of a cross-linked polymer network that traps numerous solvents through weak interactions. The natural fluidity of the trapped solvents confers the liquid-like property to gel surfaces, making them significantly different from solid surfaces. Bioinspired gel surfaces have shown promising applications in diverse fields. This work aims to summarize the fundamental understanding and emerging applications of bioinspired gel surfaces with superwettability and special adhesion. First, several typical hydrogel-based natural surfaces with superwettability and special adhesion are briefly introduced, followed by highlighting the unique properties and design principles of gel-based surfaces. Then, the superwettability and emerging applications of bioinspired gel surfaces, including liquid/liquid separation, antiadhesion of organisms and solids, and fabrication of thin polymer films, are presented in detail. Finally, an outlook on the future development of these novel gel surfaces is also provided.
工程表面润湿性在学术研究和实际应用中具有重要意义。对具有优异性能的水凝胶基天然表面的探索揭示了表面超润湿性的新设计原理。凝胶由交联聚合物网络组成，该网络通过弱相互作用捕获大量溶剂。所捕获溶剂的天然流动性赋予凝胶表面类似液体的性质，使其与固体表面有显著差异。受生物启发的凝胶表面在多个领域已显示出有前景的应用。这项工作旨在总结对具有超润湿性和特殊粘附性的受生物启发的凝胶表面的基本理解和新兴应用。首先，简要介绍几种具有超润湿性和特殊粘附性的典型水凝胶基天然表面，随后突出凝胶基表面的独特性质和设计原理。然后，详细介绍受生物启发的凝胶表面的超润湿性和新兴应用，包括液/液分离、生物体和固体的抗粘附以及聚合物薄膜的制备。最后，还对这些新型凝胶表面的未来发展进行了展望。
