The counterions of polydiallyldimethylammonium (PDADMA) coatings were altered by incubation in aqueous solutions of different electrolytes. Oil de‐wetting on the resulting polycationic surfaces upon water action exhibited a straightforward connection with the Jones–Dole viscosity B‐coefficient (Bη ) sign of surface counteranions. Upon water action, surface counteranions with negative Bη render PDADMA coatings oil‐adhering, but those with positive Bη furnish PDADMA coatings with excellent self‐cleaning. The oil‐adhering PDADMA surfaces can become self‐cleaning upon water action in response to the Bη of surface counteranions sign‐switching with increasing water temperature. Courtesy of surface counter‐anions with Bη >0, self‐cleaning PDADMA coatings enable not only conversion of conventional meshes into self‐cleaning membranes for oil/water separation, but also regioselective maneuver of oil flow on polycationic surfaces according to the Bη sign of surface counteranions patterned atop.

中文翻译：

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水作用下聚阳离子涂层的抗衡离子自清洁行为：阴离子水合的宏观剖析。

聚二烯丙基二甲基铵（PDADMA）涂层的抗衡离子可通过在不同电解质的水溶液中孵育来改变。在水作用下，所得聚阳离子表面上的油脱湿表现出与表面抗衡离子的Jones-Dole粘度B系数（Bη）符号直接相关。在水的作用，用表面负抗衡Bη渲染PDADMA涂料油附着，但那些具有积极Bη配料PDADMA涂料，具有优异的自洁性。随着水温的升高，表面抗衡阴离子的Bη随反应而变化，在水作用下，附着在油上的PDADMA表面会变得自清洁。由带有Bη的表面抗衡阴离子提供> 0时，自清洁PDADMA涂层不仅可以将常规筛网转换为用于油/水分离的自清洁膜，而且还可以根据在顶部构图的表面抗衡阴离子的Bη符号对油在聚阳离子表面上的区域选择性操纵。