Fouling- and Chlorine-Resistant Nanofiltration Membranes Fabricated from Charged Zwitterionic Amphiphilic Copolymers
Fouling- and Chlorine-Resistant Nanofiltration Membranes Fabricated from Charged Zwitterionic Amphiphilic Copolymers
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DOI：
10.1021/acsapm.1c01940
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发表时间：
2022-03
影响因子：
5
通讯作者：
Samuel J. Lounder;A. Asatekin
中科院分区：
文献类型：
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作者：
Samuel J. Lounder;A. Asatekin
纳滤膜的耐污性和耐氯性迫切需要新的高分子化学材料。这项工作介绍了带电两性离子两亲共聚物（CZACs），这是一种自组装的三元聚合物，可以自发形成由两性离子和酸性/离子化构建块组成的1-2纳米亲水纳米通道网络。我们利用CZAC自组装来开发具有阴离子纳米孔的膜过滤器，从而通过Donnan排除（R(Na2SO4) = 93.6%，在5 mM处）来增强盐的过滤能力。CZAC膜具有与商用纳滤膜相当的水力渗透性（0.86 - 2.3 L μm - 2h - 1bar - 1），优异的抗污染性和高水平的氯耐受性（32 000 ppm·h），解决了当前纳滤膜的关键性能限制。
New polymer chemistries are urgently needed to develop nanofiltration (NF) membranes with improved fouling and chlorine resistance. This work introduces charged zwitterionic amphiphilic copolymers (CZACs), self-assembling terpolymers that spontaneously form a network of ∼1–2 nm hydrophilic nanochannels composed of zwitterionic and acidic/ ionizable building blocks. We leverage CZAC self-assembly to develop membrane filters with anionic nanopores, thereby enabling enhanced salt rejection through Donnan exclusion (R(Na2SO4) = 93.6% at 5 mM). The CZAC membranes demonstrate hydraulic permeability comparable to commercial nanofiltration membranes (0.86 – 2.3 L μm m–2h–1bar–1), exceptional fouling resistance, and a high level of chlorine tolerance (32 000 ppm·h), addressing key performance limitations of current NF membranes.