Download file (1.31MB)
Download as zip (1.2MB)

コレクション

引用

説明:

Sulfonated poly(ether sulfone) (S-PES) was synthesized through the post-sulfonation of poly(ether sulfone)(PES) with chlorosulfonic acid as the sulfonating agent. The degree of sulfonation (DS) of the produced S-PES was controlled between 13.2 and 36.2% by adjusting the reaction time. The DS values were determined by elemental analysis, 1H-NMR, and titration against 0.01 M NaOH. The presence of sulfonic acid groups was confirmed using 1H-NMR and FT-IR analyses. The produced S-PES with different DS values were cast into membranes. The performance of these materials as cation-exchange membranes (CEMs) was evaluated in detail, in light of their ion exchange capacity, water uptake, hydration number, charge density, contact angle, thermal and long-term stability, ionic conductivity, and permselectivity. The properties of the obtained membranes were compared to various reported CEMs, including industrial benchmarks such as Nafion-117, Fuji CEM, FKS-20, CMX, and CSE. We demonstrate that our work achieved the best balance between ionic conductivity and permselectivity through finely controlled DS optimization. The best-performing membrane was found to have a DS of 32.4% with a significantly high ionic conductivity of 16.85 mS cm-1 and a high permselectivity of 98.0% in 0.5 M NaCl. Our work sheds light on the crucial interplay between various membrane properties as the degree of functionalization stepwise varies. The fabricated membranes are promising candidates for advancing electrodialysis-based desalination and salinity-driven renewable energy production technologies.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: cation exchange membranes

刊行年月日: 2026-01-13

出版者: American Chemical Society (ACS)

掲載誌:

• ACS Omega (ISSN: 24701343) vol. 11 issue. 1 p. 1437-1446

研究助成金:

• NIMS JPJ012307 (SIP)

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6128

公開URL: https://doi.org/10.1021/acsomega.5c09018

関連資料:

その他の識別子:

連絡先:

更新時刻: 2026-01-15 13:11:17 +0900

MDRでの公開時刻: 2026-01-15 16:21:06 +0900