膜
材料科学
化学工程
聚酰胺
界面聚合
反渗透
海水淡化
正渗透
薄膜复合膜
纳滤
聚合物
高分子化学
复合材料
化学
单体
工程类
生物化学
作者
Xing Wu,Mingmei Ding,Hang Xu,Wen Yang,Kaisong Zhang,Huali Tian,Huanting Wang,Zongli Xie
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-06-26
卷期号:14 (7): 9125-9135
被引量:171
标识
DOI:10.1021/acsnano.0c04471
摘要
The design of nanosheets interlayer between the substrate and polyamide layer has attracted growing attention to improve the performance of thin-film composite membranes. However, the membrane size is limited by current fabrication methods such as vacuum filtration. Herein, a high-performance MXene (Ti3C2Tx) interlayered polyamide forward osmosis (FO) membrane is fabricated based on a combination of a facile and scalable brush-coating of MXene on nylon substrates and the interfacial polymerization process. The as-prepared FO membrane shows high water permeability of 31.8 L m-2 h-1 and low specific salt flux of 0.27 g L-1 using 2.0 mol L-1 sodium chloride as the draw solution. This is attributed to the adjustment of substrate properties and the polyamide layer by coating of MXene as well as the facilitation of water transportation by the interlayer distances between Ti3C2Tx. The membrane also exhibits a good organic solvent forward osmosis performance with high ethanol flux as 9.5 L m-2 h-1 and low specific salt flux of 0.4 g L-1 using 2.0 mol L-1 lithium chloride as the draw solution. Moreover, the MXene interlayered FO membrane demonstrates a feasible application in real seawater desalination and industrial textile wastewater treatment. This work presents an effective approach to fabricating nanomaterials interlayered FO membranes with superior performance for both desalination and organic solvent recovery.
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