生物污染
涂层
粘附
材料科学
硅烷
化学工程
基质(水族馆)
聚氨酯
硅醇
聚合物
复合材料
纳米技术
化学
有机化学
膜
催化作用
工程类
地质学
海洋学
生物化学
作者
Peng Hu,Ru Xie,Qing Xie,Chunfeng Ma,Guangzhao Zhang
标识
DOI:10.1016/j.cej.2022.137875
摘要
Antifouling ability and substrate adhesion are typical trade-offs seen for a silicone coating. Furthermore, the self-healable inability limits their duration. This study reports a bioinspired self-stratifying coating composed of a polyurethane with dopamine and silane pedant groups and a bi-silanol-terminated poly(dimethylsiloxane) with fluorocarbon and poly(ethylene glycol) segments as a reactive amphiphilic polymer (RAP). During coating formation, the RAP with low surface energy can be enriched on the surface due to the self-stratifying effects, whereas the bioinspired dopamine and silane groups provide the coating with strong substrate adhesion. Besides, the multiple hydrogen bonds formed between the urethane linkages and the dopamine groups allow the coating to heal. Our study indicates such a polyurethane-based coating has excellent antifouling ability against proteins, bacteria, and diatoms, good self-healing performance at room temperature in air and water, as well as high adhesion strength on various substrates such as ceramic, steel, glass, and wood. This study provides a promising and universal strategy for the simultaneous realization of antifouling, self-healing, and strong substrate adhesion. The coatings could meet the needs of applications in marine antifouling, biomedical instruments, and other fields.
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