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Preparation of Mussel-Inspired Biomineralization Superhydrophilic Surface Membrane for Oil/Water Separation

Authors： LI Sinuo，LIU Jing，SUN Kai，LI Shenghai

Units： 1 School of Mechanical Engineering, Liaoning Technical University, Fuxin 123000,China；2 College of Innovation and Practice, Liaoning Technical University, Fuxin 123000,China；3 Key Laboratory of Polymer Ecomaterials, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022,China

KeyWords： bioinspired mineralization; superhydrophilic; self-cleaning; oil/water separation

ClassificationCode：TQ028.8, TQ31

year,volume(issue):pagination： 2024,44(4):65-74

Abstract：

Frequent marine crude oil spills and disorderly discharge of industrial oily wastewater have given rise to an urgent demand for efficient oil/water separation materials. Superhydrophilic membranes constructed by integrating membrane separation technology and surface engineering strategies have attracted great attention for achieving efficient oil/water separation. Herein, a mussel inspired mineralization strategy combined with mussel-inspired rapid deposition and layer-by-layer self-assembled mineralization is used to successfully prepare interface-stable superhydrophilic/underwater superoleophobic coatings with excellent self-cleaning properties on various membrane surfaces. Thanks to its outstanding superhydrophilicity and underwater oil repellency, the coated membrane is capable of efficiently separating oil/water mixtures as well as surfactant-stabilized oil-in-water emulsions. In addition, due to the excellent interfacial stability, the superhydrophilic membrane achieves long-term oil-in-water emulsion separation, with the separation efficiency of the coated membrane remaining above 99.2% during 30 times of emulsion separation. These superior properties combined with its facile fabrication process make it an ideal material for oil/water separation.

Funds：

国家自然科学基金（U22B6012）。

AuthorIntro：

李思诺（2003-），女，辽宁葫芦岛人，研究方向为膜法水处理

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