用于高效分离油包水乳液的单宁酸-果胶包覆聚偏氟乙烯膜的制备
Preparation of Tannic Acid-Pectin Coated PVDF Membrane for High-Efficiency Separation of Oil and Water Emulsions.
作者信息
Zhai Liangku, Cui Jiuyun, Lu Lei, Wang Hailong, Wei Can, Luo Jirong, Xie Atian
机构信息
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
Anhui International Joint Research Center for Nano Carbon-Based Materials and Environmental Health, Anhui University of Science and Technology, Huainan 232001, China.
出版信息
Membranes (Basel). 2025 May 16;15(5):155. doi: 10.3390/membranes15050155.
The simple preparation of superhydrophilic membranes with good stability is of great significance for efficient oil-water separation. In this work, a polyvinylidene fluoride (PVDF) membrane modified with tannic acid (TA) and pectin (PT) was developed through immersion in TA/PT solutions, facilitating the formation of complexes via co-deposition. The optimized PVDF@TA/PT3 membrane exhibited superhydrophilicity/superoleophobicity. The membrane achieved remarkable separation efficiencies exceeding 98.3% and fluxes ranging from 71.3 to 156.3 L m h for various oil-water emulsions under gravity-driven conditions. Notably, the membrane maintained exceptional durability through 10 separation cycles, retaining about 98% efficiency while exhibiting strong antifouling properties. Excellent separation performance coupled with facile fabrication protocol and chemical stability of the membrane, position the PVDF@TA/PT membrane as a technologically viable candidate for wastewater purification.
制备具有良好稳定性的超亲水性膜对于高效油水分离具有重要意义。在本工作中，通过将聚偏氟乙烯（PVDF）膜浸入单宁酸（TA）和果胶（PT）溶液中，开发了一种经TA和PT改性的PVDF膜，通过共沉积促进复合物的形成。优化后的PVDF@TA/PT3膜表现出超亲水性/超疏油性。在重力驱动条件下，该膜对各种油水乳液的分离效率超过98.3%，通量范围为71.3至156.3 L m h。值得注意的是，该膜在10次分离循环中保持了优异的耐久性，保留了约98%的效率，同时表现出很强的抗污染性能。优异的分离性能、简便的制备方法以及膜的化学稳定性，使PVDF@TA/PT膜成为废水净化技术上可行的候选材料。
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