纳滤
膜
化学工程
贻贝
儿茶酚
单宁酸
图层(电子)
基质(水族馆)
微滤
复合数
逐层
生物污染
材料科学
色谱法
结垢
渗透
化学
粘附
纳米技术
有机化学
复合材料
渗透
地质学
工程类
海洋学
生物
生物化学
生态学
作者
Dongxue Guo,Yirong Xiao,Tong Li,Qingfeng Zhou,Liguo Shen,Renjie Li,Yanchao Xu,Hongjun Lin
标识
DOI:10.1016/j.jcis.2019.10.078
摘要
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.
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