relation: https://khub.utp.edu.my/scholars/11093/ title: Preparation and characterization of highly stable protic-ionic-liquid membranes creator: Zakeri, M. creator: Abouzari-Lotf, E. creator: Nasef, M.M. creator: Ahmad, A. creator: Ripin, A. creator: Ting, T.M. creator: Sithambaranathan, P. description: A highly durable proton exchange membranes (PEM)s based on covalently supported ionic liquid (IL) bearing sulfonic acid imidazolium groups were successfully fabricated. The membrane preparation involved radiation induced grafting of 1-vinyl imidazole (1-VIm) onto poly(ethylene-co-tetraflouroethene) (ETFE) film, followed by covalent immobilization of 3-sulfopropyl and subsequent treatment with trifluoromethanesulfonic acid. The ionic conductivity of the supported IL membranes was increased with the increase in the concentration of IL and reached a maximum value of 138 mS cm�1 in a fully hydrated state with an ion exchange capacity of 4.82 mmol g�1 that is higher than Nafion with a similar thickness. The membranes displayed excellent chemical and mechanical stability. In addition, the dimensional and thermal stability of supported IL-membranes were significantly higher than commercial Nafion membranes. © 2018 Hydrogen Energy Publications LLC publisher: Elsevier Ltd date: 2019 type: Article type: PeerReviewed identifier: Zakeri, M. and Abouzari-Lotf, E. and Nasef, M.M. and Ahmad, A. and Ripin, A. and Ting, T.M. and Sithambaranathan, P. (2019) Preparation and characterization of highly stable protic-ionic-liquid membranes. International Journal of Hydrogen Energy, 44 (58). pp. 30732-30742. ISSN 03603199 relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85046126974&doi=10.1016%2fj.ijhydene.2018.04.015&partnerID=40&md5=b8c22cec13f34ca2fbf6130bc1a66b06 relation: 10.1016/j.ijhydene.2018.04.015 identifier: 10.1016/j.ijhydene.2018.04.015