材料科学
涂层
粘附
两亲性
基质(水族馆)
化学工程
聚氨酯
纳米技术
复合材料
聚合物
共聚物
海洋学
地质学
工程类
作者
Danfeng Yu,Jianxing Huang,Zhenqiang Zhang,Jiahao Weng,Xiubin Xu,Guojie Zhang,Jianguo Zhang,Xu Wu,Melissa Johnson,Jing Lyu,Hui Yang,Wenxin Wang
标识
DOI:10.1002/adma.202106908
摘要
The underwater superoleophobicity of a coating is often caused by its preferential water affinity, which, however, normally weakens the substrate adhesion property. In this work, a new strategy is reported for achieving strong underwater adhesion between a well-designed amphiphilic polyurethane coating and a diverse range of substrates while also rendering the coating surface's superoleophobicity. When the coating, which is a mixture of an amphiphilic polyurethane and a water miscible solvent, is immersed in water, the hydrophobic segments aggregate to orientate and pile along the surface of substrates via a segment orientation mechanism triggered by solvent exchange with water penetration to exert strong adhesion. At the same time, the hydrophilic segments will physically crosslink to form a hydrogel coating, endowing the substrate with underwater superoleophobicity. This work provides a facile, versatile, and scalable approach for the future design of superoleophobic coatings in a water environment.
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