Balanced Ionic Conductivity and Permselectivity of Cation Exchange Membranes Prepared from Sulfonated Poly(ether sulfone).

ABSTRACT: Sulfonated poly-(ether sulfone) (S-PES) was synthesized through the postsulfonation 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 by using ¹H NMR and FT-IR analyses. The produced S-PES with different DS values was 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

SUBMITTER: Srour HK 

PROVIDER: S-EPMC12809513 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature