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Nanofiltration membranes prepared by co-deposition of quercetin-polydopamine for dye desalination performance

Authors： YAO Zheng, JIN Teng, DONG Liang-liang, ZHANG Chun-fang, BAI Yun-xiang

Units： Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Materials Engineering, Jiangnan University, Wuxi 214122

KeyWords： quercetin；polydopamine；composite nanofiltration membrane；co-deposition；dye desalination；

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2022,42(5):122-128

Abstract：

Composite nanofiltration membranes were prepared by liquid phase co-deposition of quercetin and dopamine method. The effect of the dosge ratio of dopamine to quercetin on the surface properties of membrane active separation layer and the desalinization performance of dye were investigated. The results showed that the co-deposition of quercetin effectively inhibited the formation of polydopamine aggregates and endowed the membrane surface with better uniformity. Meanwhile, the introduction of quercetin made the structure of separation layer much looser, and significantly improved the permeability of the composite nanofiltration membranes, and the dye rejection rate was always above 92%. When the dosge ratio of dopamine to quercetin was 1:1, the pure water permeability of the composite nanofiltration membrane was up to 179.5 L·m-2·h-1·bar-1, the interception of the Congo red was 99.6%, and the selectivity of the Congo red /NaCl reached 58.7. The membranes also showed excellent long-term operation stability.

Funds：

国家自然科学基金面上项目，批准号：22075107

AuthorIntro：

姚铮（1997-），女，江苏常州人，硕士生，主要从事膜材料制备及应用研究，E-mail：18362296930@163.com

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