Sulfonated Dextran/Poly(vinyl alcohol) Polymer Electrolyte Membranes for Direct Methanol Fuel Cells

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 w...

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Published in:Macromolecular research 2007, Vol.15 (5), p.459-464
Main Authors: Won, Jong-Ok, Ahn, Su-Mi, Cho, Hyun-Dong, Ryu, Ji-Young, Ha, Heung-Yong, Kang, Yong-Soo
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container_issue 5
container_start_page 459
container_title Macromolecular research
container_volume 15
creator Won, Jong-Ok
Ahn, Su-Mi
Cho, Hyun-Dong
Ryu, Ji-Young
Ha, Heung-Yong
Kang, Yong-Soo
description 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.
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title Sulfonated Dextran/Poly(vinyl alcohol) Polymer Electrolyte Membranes for Direct Methanol Fuel Cells
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