Fabrication of high-performance composite nanofiltration membranes for dye wastewater treatment: mussel-inspired layer-by-layer self-assembly

[Display omitted] 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. Alternat...

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Bibliographic Details
Published in:Journal of colloid and interface science 2020-02, Vol.560, p.273-283
Main Authors: Guo, Dongxue, Xiao, Yirong, Li, Tong, Zhou, Qingfeng, Shen, Liguo, Li, Renjie, Xu, Yanchao, Lin, Hongjun
Format: Article
Language:English
Subjects:
Dye wastewater treatment
Hydrophilicity
Layer-by-layer self-assembly
Nanofiltration
Tannic acid
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Summary:[Display omitted] 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.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.10.078