Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 508, Issue -, Pages 7-14Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2016.02.019
Keywords
Fuel cells; Ionic liquid; Anion exchange membrane; Alkaline stability; Hybrid membrane
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Funding
- National Natural Science Foundation of China [51303017, 31200637]
- Natural Science Foundation of Jiangsu Province [BK20151187, BK2014025]
- Jiangnan Graphene Research Institute [KFKT201501]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Imidazolium-based ionic liquids and imidazolium-based organic-inorganic hybrid alkaline anion exchange membranes (AEMs) are synthesized and investigated in the present work. The imidazolium-based hybrid AEMs are prepared via in situ cross-linking of styrene, acrylonitrile, 1-vinyl-propyl-triethoxysilaneimidazolium chloride ([VPSIm][Cl]) and 1-vinyl-3-butylimidazolium bromide ([VBIm][Br]), followed by anion exchange with hydroxide ions. The water uptake and swelling degree of the hybrid AEMs decrease with increasing [VPSIm][Cl] content due to the formation of an Si-O-Si inorganic network in the membranes. The resulting organic-inorganic hybrid AEMs show good thermal stability, excellent mechanical properties and high conductivity (above 10(-2) S cm(-1) at room temperature in liquid water). Compared with samples without the addition of [VPSIm][Cl], the hybrid membranes show much higher alkaline stability, and the hybrid AEMs displayed excellent chemical stability up to 480 h in 2 M KOH solution at 60 degrees C. (C) 2016 Elsevier B.V. All rights reserved.
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