Won, Jongolk Ahn, Su Mi Cho, Hyun Dong Ryu, Ji Young Ha, Heung Yong Kang, Yong Soo 2024-01-21T00:35:10Z 2024-01-21T00:35:10Z 2021-09-02 2007-08 1598-5032 https://pubs.kist.re.kr/handle/201004/134253 Polymer electrolyte membranes, featuring ionic channels, were prepared from sulfonated dextran/ poly(vinyl alcohol) (sD/PVA) membranes. A stiff sulfated dextran was chosen as the route for ionic transport, since ionic sites are located along the stiff dextran main chain. The sD/PVA blend membranes were annealed and then chemically crosslinked. The characteristics of the crosslinked sD/PVA membranes were investigated to determine their suitability as proton exchange membranes. The proton conductivity was found to increase with increasing amounts of sD inside the membrane, which reached a maximum and then decreased when the sD content exceeded 30 wt%, while the methanol permeability increased with increasing sD content. The good dispersion of sD inside the membrane, which serves as an ionic channels mimic, played a significant role in proton transportation. English POLYMER SOC KOREA PROTON CONDUCTIVITY TRANSPORT Sulfonated dextran/poly(vinyl alcohol) polymer electrolyte membranes for direct methanol fuel cells Article 10.1007/BF03218814 1 MACROMOLECULAR RESEARCH, v.15, no.5, pp.459 - 464 MACROMOLECULAR RESEARCH 15 5 459 464 scie scopus kci ART001184262 000249284600011 2-s2.0-34548425619 Polymer Science Polymer Science Article PROTON CONDUCTIVITY TRANSPORT polymer electrolyte membranes direct methanol fuel cells poly(vinyl alcohol) dextran