Contact
    Start Publications Fabrication of S-PBI cation exchange membrane with excellent ...
    ←  Publication Finder
    Attension

    Fabrication of S-PBI cation exchange membrane with excellent anti-fouling property for enhanced performance in electrodialysis

    Year: 2023

    Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 661, 2023-03-20, page 130910

    Authors: Li, Chen; Song, Ketong; Hao, Chunxiao; Liang, Wanting; Li, Xiaoyun; Zhang, Wenjin; Wang, Ying; Song, Yuefei

    Keywords: Anti-fouling property; Cation exchange membrane; Electrodialysis; High-salinity organic wastewater; Sulfonated polybenzimidazole

    A novel anti-fouling cation exchange membrane (CEM) of sulfonated polybenzimidazole (S-PBI) was fabricated by the polymer bulk grafting modification of poly (4,4′-diphenyl ether-5,5′-bibenzimidazole) with sodium styrene sulfonate. FTIR, TGA, XPS, SEM and AFM were used to characterize membrane properties and the results showed that the ion exchange capacity and hydrophilicity of S-PBI increased with increased degrees of grafting and the electric resistance decreased accordingly. When the mass ratio of O-PBI/SSS was 1:4, the electric resistance of S-PBI-4.0 was 4.5 Ω·cm2, while the ion exchange capacity was 2.3 meq/g. The ED experiment with the S-PBI-4.0 membrane exhibited good desalination rate (>96 %), high current efficiency (80.73 %) and low energy consumption (1.13 kW·h/kg), which were very close to the results of a commercial CEM (Neosepta CMX). What's more, because of its good hydrophilicity, the S-PBI-4.0 membrane had better anti-fouling ability than Neosepta CMX, which was manifested as less resistance increase after membrane fouled by bovine serum albumin and smaller resistance after membrane cleaned by deionized water. These results demonstrate that the S-PBI-4.0 membrane is an appropriate candidate CEM and helpful to expand the application of ED in high-salinity organic industrial wastewater treatment.
    View publication