电渗析
聚砜
膜
渗透
海水淡化
化学工程
离子交换
化学
环境友好型
选择性
材料科学
离子
有机化学
催化作用
工程类
生物
生物化学
生态学
作者
Yanzhen Ren,Anran Zhang,Li Lv,Lingling Ma,Quan Jin,Minghao Yuan,Gaohong He,Fengxiang Zhang
标识
DOI:10.1016/j.seppur.2022.122419
摘要
In order to improve the performance of electrodialysis enabled desalination, a simple, efficient and low-cost method for the preparation of high-performance anion exchange membranes (AEM) is required. In this work, we designed a novel hydroxyl quaternized polysulfone (HQPSf) and blended it with environmentally friendly chitosan (CS) for AEM fabrication. Our results demonstrate that hydrogen bonding between HQPSf and CS can promote microphase separation in the resulting blend AEM, and an optimal amount of CS is important in balancing anion permeation and selectivity of the membrane. With a CS percentage of 3 % (by mass), the blend AEM yields the highest current efficiency (η) of 93.30 %, the lowest energy consumption (EC) of 4.23 kWh kg−1, and the highest selective permeability (Pm) of 96.86 % when used for electrodialysis (ED), which are far superior to the performance of unmodified HQPSf membrane (η = 86.79 %, EC = 4.57 kWh kg−1) and the commercial TWEDAI anion exchange membrane (η = 86.74 %, EC = 4.74 kWh kg−1). This work provides a facile, effective strategy to fabricate high performance AEMs for electrodialysis application.
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