Abstract:

The hydrophobic-oleophilic membrane achieves the separation of oil and water by permeating oil and blocking water. Owing to the characteristics of green process, high efficiency, easy industrial amplification, hydrophobic-oleophilic membrane separation has become an emerging technology in the fields of environmental protection, water treatment and the separation and recovery of organic liquids and hence is a research and development hotspot in membrane science and technology. In this review, after an introduction of the development history of wetting equation, we describe the influence of the synergistic effect of wettability and pore size on the membrane separation process. The strategies to design hydrophobic-oleophilic membrane are also presented, which include the construction of rough or hierarchical micro/nanostructure on the surface of low surface energy materials and the use of low surface energy materials to hydrophobically modify rough surfaces. Finally, an outlook for this emerging and promising research field is briefly described. It is necessary to further improve the theory of surface wettability, develop membrane fabrication methods that are easy for industrial production, and explore the separation effect of hydrophobic-oleophilic membrane on complex oil-water mixtures (such as one with high viscosity and of multicomponent).

Key words: wettability, hydrophobic-oleophilic, membrane, oil-water separation

摘要：

疏水亲油分离膜通过透过油相、截留水相而实现油水分离过程，它具有绿色、高效、易于工业放大等特点，在环境保护、水处理、有机液体分离与回收等领域具有广阔的应用前景，已成为膜科学与技术领域的研发热点。本文回顾了润湿方程的发展历史，介绍了表面润湿性和孔径的协同作用对膜分离过程的影响，讨论了疏水亲油分离膜的设计策略，包括在低表面能材料的表面构建粗糙或微纳米结构和使用低表面能材料对粗糙表面进行疏水改性。最后，对疏水亲油分离膜的发展趋势进行了展望，今后需进一步完善表面浸润理论，开发易于工业生产的制膜方法，探究疏水亲油分离膜对复杂油水混合物（如高黏度、多组分）的分离效果。

关键词: 润湿性, 疏水亲油, 分离膜, 油/水分离