Fabrication of high-performance composite nanofiltration membranes for dye wastewater treatment: mussel -inspired layer-by-layer self-assembly
Fabrication of high-performance composite nanofiltration membranes for dye wastewater treatment: mussel -inspired layer-by-layer self-assembly
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DOI：
10.1016/j.jcis.2019.10.078
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发表时间：
2020-02-15
影响因子：
9.9
通讯作者：
Lin, Hongjun
中科院分区：
文献类型：
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作者：
Guo, Dongxue;Xiao, Yirong;Lin, Hongjun
受贻贝粘附机理的启发，以富含邻苯二酚基团的植物多酚单宁酸（TA）和亲水性的含氨基的Jeffamine（JA）为原料，采用层层法（LBL）制备复合纳滤膜。交替地将聚丙烯腈基底浸入单独的TA和JA缓冲溶液中可以容易地构建NF膜选择性层，而无需对基底进行任何预处理。优化的膜显示出37 L m（-2）h（-1）bar（-1）的高纯水渗透性，同时保持对分子量范围为269至1017 g mol（-1）的各种染料的截留率高于90%。特别地，所获得的膜表现出优异的抗污染和长期性能归因于亲水性膜表面和选择性层中的共价键。这种新的策略继承了贻贝启发的多巴胺材料的优点，但克服了它的缺点。在这项研究中公开的结果不仅提供了一种新的策略来制备复合纳滤膜，但也有利于贻贝启发LBL设计的先进材料的环境应用。(C)2019爱思唯尔公司All rights reserved.
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.