%K Aliphatic compounds; Chemical stability; Dimensional stability; Ethylene; Film preparation; Grafting (chemical); Ion exchange; Ion exchange membranes; Ionic liquids; Liquid membranes; Mechanical stability; Thermodynamic stability, Covalent immobilization; Ion exchange capacity; Poly(vinyl imidazole); Protic ionic liquids; Proton-exchange membrane; Radiation-induced grafting; Supported ionic liquids; Trifluoromethane sulfonic acid, Proton exchange membrane fuel cells (PEMFC)
%X 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
%L scholars11093
%J International Journal of Hydrogen Energy
%O cited By 7
%R 10.1016/j.ijhydene.2018.04.015
%N 58
%D 2019
%V 44
%I Elsevier Ltd
%A M. Zakeri
%A E. Abouzari-Lotf
%A M.M. Nasef
%A A. Ahmad
%A A. Ripin
%A T.M. Ting
%A P. Sithambaranathan
%T Preparation and characterization of highly stable protic-ionic-liquid membranes
%P 30732-30742