Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 560, Issue -, Pages 273-283Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.10.078
Keywords
Tannic acid; Hydrophilicity; Layer-by-layer self-assembly; Nanofiltration; Dye wastewater treatment
Categories
Funding
- Natural Science Foundation of Zhejiang province, China [LQ19B060008]
- National Natural Science Foundation of China [51978628, 51578509]
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Inspired by the mussel adhesion mechanism, plant polyphenol tannic acid (TA) with abundant catechol groups and hydrophilic Jeffamine (JA) containing amino groups were used in a layer-by-layer (LBL) process to fabricate composite nanofiltration (NF) membranes in this study. Alternately immersing a polyacrylonitrile substrate into individual TA and JA buffer solutions could readily construct a NF membrane selective layer without any pre-treatment to the substrate. The optimised membrane showed a high pure water permeance of 37 L m(-2) h(-1) bar(-1) whilst maintaining rejections higher than 90% towards various dyes with molecular weights ranging from 269 to 1017 g mol(-1). Particularly, the obtained membrane exhibited excellent anti-fouling and long-term performance attributed to the hydrophilic membrane surface and covalent bonds in the selective layer. The novel strategy inherited the advantages of a mussel-inspired dopamine material but overcame its disadvantages. The results disclosed in this study not only provide a novel strategy to prepare composite NF membranes, but also facilitate the mussel-inspired LBL design of advanced materials for environmental applications. (C) 2019 Elsevier Inc. All rights reserved.
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