Morphological transformation during cross-linking of a highly sulfonated poly(phenylene sulfide nitrile) random copolymer
- Title
- Morphological transformation during cross-linking of a highly sulfonated poly(phenylene sulfide nitrile) random copolymer
- Author
- 이영무
- Issue Date
- 2012-12
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE,V.5 N.12, p9795-p9802, 8p.
- Abstract
- We present a new approach of morphological transformation for effective proton transport within ionomers, even at partially hydrated states. Highly sulfonated poly(phenylene sulfide nitrile) (XESPSN) random network copolymers were synthesized as alternatives to state-of-the-art perfluorinated polymers such as Nafion (R). A combination of thermal annealing and cross-linking, which was conducted at 250 degrees C by simple trimerisation of ethynyl groups at the chain termini, results in a morphological transformation. The resulting nanophase separation between the hydrophilic and hydrophobic domains forms well-connected hydrophilic nanochannels for dramatically enhanced proton conduction, even at partially hydrated conditions. For instance, the proton conductivity of XESPSN60 was 160% higher than that of Nafion (R) 212 at 80 degrees C and 50% relative humidity. The water uptake and dimensional swelling were also reduced and mechanical properties and oxidative stability were improved after three-dimensional network formation. The fuel cell performance of XESPSN membranes exhibited a significantly higher maximum power density than that of Nafion (R) 212 under partially hydrated environments.
- URI
- http://pubs.rsc.org/en/content/articlelanding/2012/ee/c2ee21992a#!divAbstracthttp://hdl.handle.net/20.500.11754/53399
- ISSN
- 1754-5692
- DOI
- 10.1039/c2ee21992a
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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