Preparation and evaluation of sulfonated polysulfone-TiO2 nanocomposite membranes for proton exchange membrane fuel cell applications
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1Fuel Cell Laboratory, Green Research Center, Iran University of Science and Technology, Narmak, Tehran, Iran.
2School of Chemical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran.
In the present study, sulfonated polysulfone (SPSF)-titanium dioxide (TiO2) nanocomposite membranes were prepared for use in proton exchange membrane fuel cells (PEMFCs) applications. The degree of sulfonation of prepared SPSF polymer was obtained by H-NMR analysis and was 91%. TiO2 nanoparticles were synthesized by the sol-gel method and characterized by XRD. The membranes were prepared by the solution casting method and NMP was used as a solvent for this process. The composite membranes were prepared by mixing TiO2 with SPSF solution (3 and 5 wt.%). The membranes have been characterized by water uptake and proton conductivity measurements. The results showed the prepared membranes have appropriate proton conductivity values.