This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/28015 in citations.
Please use the identifier: http://dx.doi.org/10.1002/macp.202100028 in citations.
Synthesis and Characterization of 4‐Vinylimidazolium/Styrene‐Cografted Anion‐Conducting Electrolyte Membranes
Synthesis and Characterization of 4‐Vinylimidazolium/Styrene‐Cografted Anion‐Conducting Electrolyte Membranes
The β-hydrogen-free imidazole monomer, 2-methyl-N-methyl-4(5)-vinylimidazole (2M4VIm), is synthesized to prepare anion exchange membranes (AEMs). The radiation-induced graft polymerization of 2M4VIm and styrene is performed in poly(ethylene-co-tetrafluoroethylene), followed by N-alkylation and ion e...
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Personal Name(s): | Hamada, Takashi (Corresponding author) |
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Yoshimura, Kimio / Takeuchi, Kota / Watanabe, Shun / Zhao, Yue / Hiroki, Akihiro / Hagiwara, Tokio / Shishitani, Hideyuki / Yamaguchi, Susumu / Tanaka, Hirohisa / Radulescu, Aurel / Ohwada, Kenji / Maekawa, Yasunari (Corresponding author) | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ JCNS-4; JCNS-4 Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Macromolecular chemistry and physics, 222 (2021) 11, S. 2100028 |
Imprint: |
Weinheim
Wiley-VCH
2021
|
DOI: |
10.1002/macp.202100028 |
Document Type: |
Journal Article |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
Published on 2021-06-01. Available in OpenAccess from 2022-06-01. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1002/macp.202100028 in citations.
The β-hydrogen-free imidazole monomer, 2-methyl-N-methyl-4(5)-vinylimidazole (2M4VIm), is synthesized to prepare anion exchange membranes (AEMs). The radiation-induced graft polymerization of 2M4VIm and styrene is performed in poly(ethylene-co-tetrafluoroethylene), followed by N-alkylation and ion exchange reactions to prepare 4-vinylimidazolium-containing AEM (2M4VIm/St-AEM). AEMs that have a 6/4 2M4VIm/St molar ratio and 1.7 mmol g−1 ion exchange capacity (IEC) result in 75 mS cm−1 conductivity and 60% water uptake at room temperature in water, demonstrating enhanced values compared to previously reported 2-methyl-N-vinylimidazolium-containing AEMs (2MNVIm/St-AEM) that have a similar comonomer ratio and IEC. The small-angle neutron scattering measurements of dry and swollen 2M4VIm/St-AEM reveal hydrophilic/hydrophobic two-phase separation, as observed for 2MNVIm/St-AEM with a similar Im/St composition. 2M4VIm/St-AEMs exhibit higher alkaline stability in 1 m KOH at 80 °C at an early stage owing to the suppression of imidazolium β-elimination but lower long-term stability than that of 2MNVIm/St-AEM due to the ring-opening reaction of the imidazolium group due to its outward orientation from the graft main chain. |