Superwetting membranes, especially superhydrophilic and underwater superoleophobic membranes, are promising functional materials for oily wastewater treatment. Most superwetting membranes are charactered by micro-porous membranes with hierarchical morphology and hydrophilic composition. However, challenges still remain to synthesize superwetting membranes directly via phase separation that can overcome the limitations of the inherent features of the substrate and the need of multistep post-processing procedures. In this study, a facile strategy is reported to fabricate superwetting membranes via combining multiple polyphenol-mediated complexation with nonsolvent-induced phase separation (MPMC-NIPS). The metal-phenolic gelation networks (MPgNs) are formed within membrane matrix by in situ complexation in the casting solution, and followed by the interfacial complexation of F127-phenolic hydrogen-bonding networks (FPhNs) during the coagulation process. The MPgNs create surface structures with wrinkled microspherical organizations, and the FPhNs facilitate surface hydrophilicity. The resulting specific hierarchical wrinkled and hydrophilic surface architectures endow the membranes with superhydrophilicity and underwater superoleophobicity. The as-prepared PVDF/TA-Ti-SF127 membrane exhibits excellent emulsion permeation flux up to 6265 L m^-2 h^-1 bar^-1 with high separation efficiency of over 99.6% and superior antifouling performance. This study highlights a promising and facile route to design superwetting membranes with tailored hierarchical wrinkled surface morphology for high-efficient oil-in-water emulsion separation, which contributes to the on-demand design and construction of micro-porous superwetting membranes.

超润湿膜，特别是超亲水和水下超疏油膜，是含油废水处理的有前途的功能材料。大多数超润湿膜的特点是具有分层形态和亲水成分的微孔膜。然而，通过相分离直接合成超润湿膜仍然存在挑战，这可以克服基材固有特征的限制和多步骤后处理程序的需要。在这项研究中，报道了一种通过将多种多酚介导的络合与非溶剂诱导相分离 (MPMC-NIPS) 相结合来制造超润湿膜的简便策略。金属-酚类凝胶网络 (MPgNs) 是通过原位在膜基质内形成的在浇铸溶液中络合，然后在凝固过程中 F127-酚醛氢键网络 (FPhNs) 的界面络合。MPgNs 产生具有皱纹微球组织的表面结构，而 FPhNs 促进表面亲水性。由此产生的特定分层皱纹和亲水表面结构赋予膜超亲水性和水下超疏油性。所制备的 PVDF/TA-Ti-SF127 膜表现出优异的乳液渗透通量，最高可达 6265 L m ^-2  h ^-1 bar ^-1分离效率高达99.6%以上，防污性能优越。该研究强调了一种有前途且简便的途径来设计具有定制分层皱纹表面形态的超润湿膜，用于高效水包油乳液分离，这有助于微孔超润湿膜的按需设计和构建。