Wang Hui, Wang Fei, Li Zhichao, Zheng Yu, Gu Tianrun, Zhang Runnan, Jiang Zhongyi
Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China.
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
J Hazard Mater. 2023 Oct 15;460:132425. doi: 10.1016/j.jhazmat.2023.132425. Epub 2023 Aug 27.
Fabricating membranes with superior antifouling property and long-term high performance is in great demand for efficient oil-water separation. Herein, we reported a reaction enabled surface segregation method for antifouling membrane fabrication, in which the pre-synthesized fluorinated ternary copolymer Pluronic F127 was coordinated with Ti as segregation additive in the membrane casting bath. Additionally, tannic acid was utilized to enhance the self-assembly of the copolymer in the coagulation bath, and freshly-biomineralized TiO was anchored into the membrane surface through hydrogen bond. A hydrogel layer was constructed onto the membrane surface with synergistically tailored heterogeneous chemical composition and heterogeneous geometrical roughness. The dual-heterogeneous membrane exhibited hydrophilic and underwater superoleophobic features, resulting in high water flux (621.7 L m h) at low operation pressure of 0.05 MPa and an excellent antifouling property (only 4.8% flux decline during 24-hour filtration). In situ reaction enabled surface segregation method will accelerate the development of antifouling membranes for oil-in-water emulsion separation.
制造具有优异抗污染性能和长期高性能的膜对于高效油水分离具有迫切需求。在此，我们报道了一种用于制造抗污染膜的反应诱导表面偏析方法，其中预先合成的氟化三元共聚物普朗尼克F127在膜铸膜浴中与钛作为偏析添加剂配位。此外，单宁酸用于增强共聚物在凝固浴中的自组装，并且通过氢键将新生物矿化的TiO固定在膜表面。在膜表面构建了具有协同定制的异质化学成分和异质几何粗糙度的水凝胶层。这种双异质膜表现出亲水性和水下超疏油性，在0.05MPa的低操作压力下具有高水通量（621.7L·m⁻²·h⁻¹）和优异的抗污染性能（在24小时过滤过程中通量仅下降4.8%）。反应诱导表面偏析方法将加速用于水包油乳液分离的抗污染膜的发展。
