State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, and †Natural Science Research Center, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology , Harbin, Heilongjiang 150090, People's Republic of China.
ACS Appl Mater Interfaces. 2014 Jan 8;6(1):636-41. doi: 10.1021/am4047393. Epub 2013 Dec 16.
Surfaces with controlled oil wettability in water have great potential for numerous underwater applications. In this work, we report a smart surface with pH-responsive oil wettability. The surface shows superoleophilicity in acidic water and superoleophobicity in basic water. Reversible transition between the two states can be achieved through alteration of the water pH. Such smart ability of the surface is due to the cooperation between the surface chemistry variation and hierarchical structures on the surface. Furthermore, we also extended this strategy to the copper mesh substrate and realized the selective oil/water separation on the as-prepared film. This paper reports a new surface with excellently controllable underwater oil wettability, and we believe such a surface has a lot of applications, for instance, microfluidic devices, bioadhesion, and antifouling materials.
具有可控油润湿性能的表面在众多水下应用中具有巨大的潜力。在这项工作中，我们报告了一种具有 pH 响应性油润湿性的智能表面。该表面在酸性水中表现出超亲油性，在碱性水中表现出超疏油性。通过改变水的 pH 值可以实现两种状态之间的可逆转换。表面的这种智能能力归因于表面化学变化和表面上的分层结构之间的协同作用。此外，我们还将该策略扩展到铜网基底，并在制备的薄膜上实现了选择性的油水分离。本文报道了一种具有极好水下油润湿性的新型表面，我们相信这种表面具有许多应用，例如微流控器件、生物黏附和防污材料。
