Abstract
Thermal polymerization of styrene sorbed into a polyvinylidene fluoride (PVdF) film from a toluene solution followed by sulfonation of the resulting material was performed. The kinetics of polystyrene (PS) accumulation in the PVdF film during thermal polymerization was studied. Samples with 6–30 wt % PS and ∼100% PS sulfonation were obtained. Proton-exchange membranes wsith an ion-exchange capacity of up to 2 mg-eq/g and proton conductivity of up to 0.008 S/cm at 75% relative humidity were prepared. The permeability coefficients of water, methanol, and hydrogen and their dependences on the amount of introduced PS, ion-exchange capacity, and water uptake of membranes were measured. The synthesized materials proved similar to MF-4SK membranes in their basic transport characteristics and can be used as proton-exchange membranes in hydrogen-air and alcohol fuel cells.
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Original Russian Text © E.F. Abdrashitov, V.Ch. Bokun, D.A. Kritskaya, E.A. Sanginov, A.N. Ponomarev, Yu.A. Dobrovol’skii, 2011, published in Elektrokhimiya, 2011, Vol. 47, No. 4, pp. 411–419.
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Abdrashitov, E.F., Bokun, V.C., Kritskaya, D.A. et al. Synthesis and transport properties of proton-conducting membranes based on polyvinylidene fluoride films with introduced and sulfonated polystyrene. Russ J Electrochem 47, 387–394 (2011). https://doi.org/10.1134/S1023193511040021
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DOI: https://doi.org/10.1134/S1023193511040021