Abstract
In the present work, sulfonated (IPN-SO3H) membranes were obtained from PEI/DGEBA interpenetrating polymer network membranes and characterized by vibrational infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and electrochemical impedance spectroscopy (EIS). The membranes exhibited thermal stability higher than 230 oC and conductivity of about 10-3 Ω-1cm-1 at 80 oC, with activation energy values indicating different proton conduction mechanisms depending on the sulfonation degree. Due to the overall properties of the IPN-SO3H membranes, they can be considered promising materials for application in PEMFC.
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