Ultrawetting membranes have enabled great progress in oil/water separation and have helped to address global industrial wastewater pollution and marine oil spills. However, there are few reports of 3D multilayer network membranes that can be easily prepared, and give efficient separation in micro‐ and nanoscale oil‐in‐water emulsions. A membrane is designed for emulsion separation; it consists of ultralong (over 10 µm) sodium titanate nanofibers as the selective layer and a jungle‐like Co₃O₄ nanoneedles mesh as the support layer. This mesh shows superhydrophilicity in air and low‐adhesive superoleophobicity under water. This membrane gives 99.9% separation efficiency and good permeation flux, and has great advantages in the separation under gravity of oil‐in‐water emulsions with droplet sizes larger than 400 nm. The results of this work provide a new method for designing ultrathin, efficient, and durable separation membranes with a 3D multilayer network structure.

中文翻译：

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基于均匀分散的纳米纤维/ Co3O4纳米针的多层网络膜，用于微米级油/水乳化液的高效分离

超湿膜在油/水分离方面取得了长足的进步，并有助于解决全球工业废水污染和海洋溢油问题。但是，很少有关于3D多层网络膜可以轻松制备并能有效分离微米级和纳米级水包油型乳剂的报道。膜设计用于乳液分离；它由超长（超过10 µm）钛酸钠纳米纤维作为选择层和类似丛林的Co ₃ O _4组成纳米针网状作为支撑层。该网眼在空气中表现出超亲水性，而在水下表现出低粘性的超疏油性。该膜可提供99.9％的分离效率和良好的渗透通量，在液滴尺寸大于400 nm的水包油型乳液在重力作用下的分离方面具有很大的优势。这项工作的结果为设计具有3D多层网络结构的超薄，高效和耐用的分离膜提供了一种新方法。