纳米纤维素
生物污染
膜
纳滤
化学工程
海水淡化
结垢
聚酰胺
化学
材料科学
界面聚合
纳米复合材料
色谱法
聚合物
纤维素
选择性
高分子化学
有机化学
单体
催化作用
工程类
生物化学
作者
Daowei Xia,Mengxiao Zhang,Congcong Tong,Zhanghui Wang,Hongzhi Liu,Liping Zhu
出处
期刊:Desalination
[Elsevier]
日期:2022-01-01
卷期号:521: 115397-115397
被引量:28
标识
DOI:10.1016/j.desal.2021.115397
摘要
It remains a huge challenge to develop a high-performance nanofiltration (NF) membrane with excellent perm-selectivity and antifouling properties. Herein, we report a novel thin-film nanocomposite (TFN) membrane by in-situ incorporating zwitterionic nanocellulose during interfacial polymerization. Unlike commonly-used nanomaterials, the zwitterionic nanocellulose anchored with both quaternary ammonium and phosphate group is able to be well dispersible in water to ensure the formation of defect-free separation layer. The resultant membrane exhibited not only increased water permeance (14.4 L m‐−2 h−1 bar−1) but enhanced divalent salt rejection (RNa2SO4 = 98.3%) owing to the increased surface hydrophilicity and high surface area as well as the extra hydrophilic interfacial nanochannels. With the assistance of high monovalent ion permeability endowed by zwitterions, this TFN membrane also behaved highly efficient antibiotic desalination with elevated separation factor of around 4.3. Moreover, the antifouling capability and cleaning recovery ability was greatly improved when both of the negatively and positively charged bovine serum albumin were utilized as foulants. Under the synergism of nanocellulose and zwitterions, therefore, the developed membrane in this work possessed superior perm-selectivity and antifouling properties, which would have promising potentials in separation fields.
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