UV-crosslinked poly(arylene ether sulfone) - LAPONITE (R) nanocomposites for proton exchange membranes

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The dimensional stability and barrier properties of proton exchange membranes are critical issues for high-performance proton exchange membrane fuel cells (PEMFCs). In this work, we introduce a viable and effective strategy for preparing high proton-conductive polymer membranes with remarkable dimensional stability and barrier properties. Sulfonated poly(arylene sulfone)s (sPASs) with a UV-crosslinkable monomer, 2,2 '-diallylbisphenol A (DABPA), is successfully synthesized via condensation polymerization, showing competitive molecular weights and sulfonation degrees to the neat polymer. Crosslinked nanocomposite membranes can be fabricated by incorporating soft bridge molecules and exfoliated LAPONITE (R) nanofillers, and subsequent UV-crosslinking. The sPAS-LAPONITE (R) nanocomposite membranes show greatly improved dimensional stabilities and barrier properties including remarkably reduced swelling ratio in solvent or methanol aqueous solutions. These enhanced properties lead to excellent performance in a direct methanol fuel cell (DMFC) test, surpassing that of a commercially available Nafion membrane based devices.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2017
Language
English
Article Type
Article
Keywords

METHANOL FUEL-CELLS; POLYMER ELECTROLYTE MEMBRANES; OF-THE-ART; PERFORMANCE; STATE; ACID; TECHNOLOGIES; SELECTIVITY; COPOLYMERS; LINKING

Citation

RSC ADVANCES, v.7, no.45, pp.28358 - 28365

ISSN
2046-2069
DOI
10.1039/c7ra04419d
URI
http://hdl.handle.net/10203/224751
Appears in Collection
MS-Journal Papers(저널논문)
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