City University of Hong Kong , Shenzhen Research Institute , Shenzhen 518075 , P. R. China.
ACS Appl Mater Interfaces. 2019 Dec 18;11(50):47382-47389. doi: 10.1021/acsami.9b17199. Epub 2019 Dec 4.
Polymeric coatings that show tunable mechanical strength, healing ability of mechanical damage, and proper liquid repellency will be promising in various areas across life and industry. However, the exploitation of such coating materials is largely limited by their molecular design. In this work, polymeric coatings with ion-controlled mechanics and coloration and damage-healing and oil-sliding properties have been demonstrated based on a supramolecular design of dual-cross-linked polysiloxanes. The coating color and mechanical properties can be adjusted by coordinative metal ions with various metal-ligand binding abilities. Dense and dynamic hydrogen bonds and coordination bonds lead to the ready healing ability and high durability of the coating. The extreme smoothness of the flat silicone coating facilitates not only the sliding of impinging oil but also the restoration of topological integrity from mechanical damage. The coating can be selectively patterned and applied to large-scale substrates by diverse coating operations, making it feasible for versatile applications.
具有可调机械强度、机械损伤自修复能力和适当的拒液性能的聚合物涂层有望在生命和工业的各个领域得到应用。然而，这类涂层材料的开发在很大程度上受到其分子设计的限制。在这项工作中，基于双交联聚硅氧烷的超分子设计，展示了具有离子控制力学、颜色、损伤修复和油滑动性能的聚合物涂层。通过具有不同金属配体结合能力的配位金属离子可以调节涂层的颜色和机械性能。密集且动态的氢键和配位键赋予涂层良好的自修复能力和高耐久性。平坦的硅酮涂层的极度光滑性不仅有利于撞击油的滑动，还有利于从机械损伤中恢复拓扑完整性。通过各种涂层操作，可以对涂层进行选择性图案化并应用于大规模基底，使其具有广泛的应用可行性。
