Synthetic approaches for advanced multi-block anion exchange membranes

Dongwon Shin, Adam F. Nugraha, Farid Wijaya, Sojeong Lee, Eunyoung Kim, Jieun Choi, Hyoung Juhn Kim, Byungchan Bae

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Despite our ability to post-functionalize poly(arylene ether sulfone) multi-block copolymers by rapid chloromethylation, bromination, or acylation, with degrees of functionalization that exceeded 70% in a few hours, materials formed during attempts to prepare fully post-functionalized multi-block copolymers are poorly soluble due to undesired side reactions, such as crosslinking or di-bromination. In particular, clustered reactive sites in multi-block copolymers increase the chance of self-reactions between polymer backbones, resulting in the formation of by-products. On the other hand, the authentic multi-block copolymer with good solubility and high molecular weight was successfully synthesized using functionalized monomers. Despite its low ion-exchange capacity, the resulting multi-block copolymer outperformed the commercial FAA-3-30 membrane in terms of anion conductivity, even under low relative humidity conditions.

Original languageEnglish
Pages (from-to)21106-21115
Number of pages10
JournalRSC Advances
Volume9
Issue number37
DOIs
Publication statusPublished - 2019

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