Abstract Achieving reversible wetting properties of separation membrane for on-demand separate oil/water mixture remains challenging, especially for the oil/water mixtures with complex impurities. Herein, hierarchical porous dynamic separation membranes involving primary fiber membrane and secondary nanostructures are fabricated by in situ growth ZnO nanowires on the surface of carbon fibers. Based on the effect of oxygen-related defects of ZnO nanowires coating, the as-fabricated dynamic separation membrane is capable of switching wetting property between high-hydrophobicity and superhydrophilicity via simply annealing alternatively under vacuum and air environment, achieving the switching between oil-removing mode and water-removing mode according to the type of oil/water mixtures. Moreover, the dynamic separation membrane can be extended to separate the oil/water mixtures containing suspended solids using the reconstruction of ZnO dynamic coating. Through removing the ZnO dynamic coating via soaking the clogged membrane in the hydrochloric acid–ethanol and refabricating the ZnO-dynamic coating, the membrane blocked by impurities could be readily re-formed, which effectively expand its scope of application and enhance its anti-fouling property. This work not only provides a simple and on-demand solution for pure oily wastewater, but also extends the separation membrane to separate oil/water mixtures containing suspended solids.

中文翻译：

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具有可调润湿性的原位制备动态碳纤维膜用于选择性油水分离

摘要 实现分离膜的可逆润湿特性以按需分离油/水混合物仍然具有挑战性，特别是对于含有复杂杂质的油/水混合物。在此，通过在碳纤维表面原位生长ZnO纳米线制备了涉及初级纤维膜和次级纳米结构的分级多孔动态分离膜。基于ZnO纳米线涂层氧相关缺陷的影响，所制备的动态分离膜能够在真空和空气环境下通过简单退火在高疏水性和超亲水性之间切换润湿性，实现除油与超亲水性之间的切换。根据油/水混合物的类型，设置模式和除水模式。而且，使用ZnO动态涂层的重建，动态分离膜可以扩展到分离含有悬浮固体的油/水混合物。通过将堵塞的膜在盐酸-乙醇中浸泡去除氧化锌动态涂层，再制造氧化锌动态涂层，可以很容易地重新形成被杂质堵塞的膜，有效地扩大了其应用范围，增强了其防污性。财产。这项工作不仅为纯含油废水提供了一种简单的按需解决方案，而且还扩展了分离膜以分离含有悬浮固体的油/水混合物。通过将堵塞的膜在盐酸-乙醇中浸泡去除氧化锌动态涂层，再制造氧化锌动态涂层，可以很容易地重新形成被杂质堵塞的膜，有效地扩大了其应用范围，增强了其防污性。财产。这项工作不仅为纯含油废水提供了一种简单的按需解决方案，而且还扩展了分离膜以分离含有悬浮固体的油/水混合物。通过将堵塞的膜在盐酸-乙醇中浸泡去除氧化锌动态涂层，再制造氧化锌动态涂层，可以很容易地重新形成被杂质堵塞的膜，有效地扩大了其应用范围，增强了其防污性。财产。这项工作不仅为纯含油废水提供了一种简单的按需解决方案，而且还扩展了分离膜以分离含有悬浮固体的油/水混合物。