New Proton Conductive Membranes Based on Acid-doped Interpenetrating Polymer Networks

Membranes of interpenetrating polymer networks (IPN) were synthesized from polyethyleneimine (PEI) and DGEBA (diglycidyl ether of bisphenol A), which were immersed in a solution of H 3 PO 4 order to obtain proton conductivity in the membranes. The IPN membranes were characterized by vibrational spectroscopy in the infrared and thermogravimetric analysis, IPN/H 3 PO 4 for the system was studied by electrochemical impedance spectroscopy. The membrane retains water to a temperature above 210 ºC, with thermal stability greater than 270 ºC. The conductivity values were obtained from 10 -4 to 10 -3 Ω -1 cm -1 , raising the temperature 20-80 ºC respectively. The values of activation energy show the predominance of car for the driving mechanism of the proton for the systems in this way through their general properties of the membranes obtained are promising materials for application in fuel cells.