Chemically Tailored Multifunctional Asymmetric Isoporous Triblock Terpolymer Membranes for Selective Transport,Advanced Materials

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Chemically Tailored Multifunctional Asymmetric Isoporous Triblock Terpolymer Membranes for Selective Transport
Advanced Materials ( IF 27.4 ) Pub Date : 2020-01-16 , DOI: 10.1002/adma.201907014
Zhenzhen Zhang ₁ , Md. Mushfequr Rahman ₁ , Clarissa Abetz ₁ , Anke‐Lisa Höhme ₁ , Evgeni Sperling ₁ , Volker Abetz _{1,

2}

Affiliation

Membrane‐based separation of organic molecules with 1–2 nm lateral dimensions is a demanding but rather underdeveloped technology. The major challenge is to fabricate membranes having distinct nanochannels with desired functionality. Here, a bottom‐up strategy to produce such a membrane using a tailor‐made triblock terpolymer featuring miscible end blocks with two different functional groups is demonstrated. A scalable multifunctional integral asymmetric isoporous membrane is fabricated by the solvent evaporation‐induced self‐assembly of the block copolymer combined with nonsolvent‐induced phase separation. The membrane nanopores are readily functionalized using positively and negatively charged moieties by two straightforward gas–solid reactions. The pores of the post‐functionalized membranes act as target‐specific functional soft nanochannels due to swelling of the polyelectrolyte blocks in a hydrated state. The membranes show unprecedented separation selectivity of small molecules based on size and/or charge which demonstrates the potential of the proposed strategy to prepare next‐generation nanofiltration membranes.

中文翻译：

化学定制的多功能不对称等孔三嵌段三元共聚物膜的选择性运输。

基于膜的横向尺寸为1-2 nm的有机分子的分离是一项要求很高的技术，但该技术尚不完善。主要的挑战是制造具有具有所需功能的不同纳米通道的膜。在此，展示了一种自下而上的策略，该策略使用量身定制的三嵌段三元共聚物来生产这种膜，该三嵌段三元共聚物具有与两个不同官能团互溶的端嵌段。通过溶剂蒸发诱导的嵌段共聚物的自组装结合非溶剂诱导的相分离，制备出可扩展的多功能整体不对称等孔膜。通过两个简单的气固反应，可以使用带正电和带负电的部分轻松地对膜纳米孔进行功能化。由于处于水合状态的聚电解质嵌段的溶胀，后功能化膜的孔充当了特定于目标的功能性软纳米通道。该膜显示出基于大小和/或电荷的小分子空前的分离选择性，这证明了拟议策略制备下一代纳滤膜的潜力。

更新日期：2020-02-24

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