A series of oil/water separation membranes with tunable surface wettability based on poly(ionic liquid)s (PILs) were prepared via a facile one-step photopolymerization of N-vinylimidazolium ionic liquids and divinylbenzene on meshes. The wettability of PIL-based membranes (PILMs) was adjusted by the structures of PILs, specifically the alkyl chain length of imidazolium (butyl and octyl) and anion species (acrylic anion, Br^–, and PF₆^–). Tunability of wettability resulted in the hydrophilic or hydrophobic property of PILMs. The hydrophilic poly(1-vinyl-3-butylimidazolium acrylate)-based membrane (PILM-1) transported water and intercepted oil, while the hydrophobic poly(1-vinyl-3-octylimidazolium hexafluorophosphate)-based membrane (PILM-5) removed oil and rejected water. The two membranes with opposite wettability showed excellent oil/water separation efficiency (above 99%) in batch processes. Continuous oil/water separation was also achieved by assembling PILM-1 and PILM-5 on the fabricated devices. A T-type device could separate various oil/water mixtures continuously, and a tank-type device could separate dispersed oil/water mixtures, with a handling capacity of 46 L within 12 h.

中文翻译：

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具有相反润湿性的聚（离子液体）涂层筛网，用于连续油/水分离

通过在筛网上进行N-乙烯基咪唑鎓离子液体和二乙烯基苯的一步式光聚合，制备了一系列基于聚离子液体（PIL）的具有可调表面润湿性的油/水分离膜。通过PIL的结构，尤其是咪唑鎓（丁基和辛基）的烷基链长和阴离子种类（丙烯酸阴离子，Br ^–和PF ₆ ^–）来调节PIL基膜（PILM）的润湿性。）。润湿性的可调性导致PILM的亲水性或疏水性。亲水性聚（1-乙烯基-3-丁基咪唑鎓丙烯酸酯）基膜（PILM-1）输送水和截留的油，而疏水性聚（1-乙烯基-3-辛基咪唑六氟磷酸酯）基膜（PILM-5）除去油和废水。具有相反润湿性的两个膜在分批过程中表现出出色的油/水分离效率（超过99％）。通过在制造的设备上组装PILM-1和PILM-5，还可以实现油/水的连续分离。T型设备可以连续分离各种油/水混合物，罐型设备可以分离分散的油/水混合物，在12小时内的处理能力为46L。