Radiation-grafted PTFE membranes for fuel cell applications
Paper ID : 1130-MST2015-FULL
Azam Akhavan *, Farah Khoylou, Nasrin Sheikh
Radiation Applications Research School, Nuclear Science and Technology Research Institute
Radiation grafting method for the preparation of proton exchange membranes offers a cost-competitive option for the polymer electrolyte fuel cells (PEFC). In this work a proton exchange membrane based on polytetrafluoroethylene (PTFE) was prepared by radiation induced grafting of styrene into PTFE film as follows. First the graft copolymerization was carried out by the gamma-preirradiation method and then sulfonation of the grafted films was performed in chlorosulfonic acid (ClSO3H) solution. FT-IR spectroscopy revealed the grafting of monomer into PTFE film and also the presence of sulfonic acid groups in the aromatic rings of the graft chain. The properties of the grafted film including the degree of grafting, water uptake and ion exchange capacity (IEC) were investigated using various analytical techniques.
Proton exchange membrane, Radiation grafting, PTFE
Status : Paper Accepted (Poster Presentation)