纳滤
膜
佩多:嘘
结垢
导电体
原位
原位聚合
膜污染
化学工程
材料科学
聚合
化学
纳米技术
工程类
聚合物
有机化学
复合材料
生物化学
图层(电子)
作者
Tian-Zhi Jia,Feng Ren,Chun Cui,Qian Chen,Levente Cseri,Rongfei Zhou,György Székely,Xun Cao,Shi‐Peng Sun
标识
DOI:10.1016/j.watres.2024.121251
摘要
Nanofiltration (NF) membranes play a pivotal role in water treatment; however, the persistent challenge of membrane fouling hampers their stable application. This study introduces a novel approach to address this issue through the creation of a poly(3,4-ethylenedioxythiophene) (PEDOT)-based conductive membrane, achieved by synergistically coupling interfacial polymerization (IP) with in situ self-polymerization of EDOT. During the IP reaction, the concurrent generation of HCl triggers the protonation of EDOT, activating its self-polymerization into PEDOT. This interwoven structure integrates with the polyamide network to establish a stable selective layer, yielding a remarkable 90% increase in permeability to 20.4 L m−2 h−1 bar−1. Leveraging the conductivity conferred by PEDOT doping, an electro-assisted cleaning strategy is devised, rapidly restoring the flux to 98.3% within 5 minutes, outperforming the 30-minute pure water cleaning approach. Through simulations in an 8040 spiral-wound module and the utilization of the permeated salt solution for cleaning, the electro-assisted cleaning strategy emerges as an eco-friendly solution, significantly reducing water consumption and incurring only a marginal electricity cost of 0.055 $ per day. This work presents an innovative avenue for constructing conductive membranes and introduces an efficient and cost-effective electro-assisted cleaning strategy to effectively combat membrane fouling.
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