Journal
ELECTROCHIMICA ACTA
Volume 86, Issue -, Pages 352-359Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.03.125
Keywords
Block copolymer; Polymer electrolyte; Proton exchange membrane; PEMFC; Polymer
Categories
Funding
- Konkuk University
Ask authors/readers for more resources
Multi-sulfonated block copolymers (MSBPs) with sulfonated units of 5, 9, 10, and 14 mol% were successfully synthesized for proton exchange membrane. The hydrophobic block oligomer was prepared by 4,4'-dihyciroxydiphenylsulfone and 4,4'-difluorodiphenylsulfone. And also hydrophilic block oligomer was prepared by multiphenyl structured monomers of 1,2-bis(4-fluorobenzoyl)-3,4,5,6-tetraphenylbenzene and 1,2-bis(4-hydroxyphenyl)-3,4,5,6-tetraphenylbenzene by varying the different mole ratio to control the degree of sulfonation. The two steps of sulfonation was carried out under chlorosulfonic acid, and then concentrated sulfuric acid separately. The sulfonation was performed selectively on hydrophilic block segment and para: position of the side chain phenyl groups. MSBPs were studied by FT-IR, H-1 NMR spectroscopy, and thermo gravimetric analysis (TGA). Sorption experiments were conducted to observe the interaction of MSBPs with water. The wateruptakes were 9.6-42.5% at 25 degrees C and 14.7-90.8% at 80 degrees C. The resulted ion exchange capacities (IEC) were 0.79-1.87 (mmol g(-1)) and proton conductivities were evaluated as increasing IEC. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available