Abstract
Poly(vinylidene fluoride) membranes with BaTiO3 powders were grafted with styrene monomer and then sulfonated in concentrated sulfuric acid. The composite proton exchange membranes were characterized by Fourier Transform Infrared Spectrometer and X-ray diffraction. The results showed chemical absorption formed between poly(vinylidene fluoride) and BaTiO3. The proton conductivity and vanadium ion permeability of the membranes were determined by two-electrode AC impedance and UV–visible spectrophotometry, respectively. The experimental results showed that the addition of BaTiO3 decreased the permeability of V(IV) ions significantly. Proton conductivity reached 1.11S/cm when the BaTiO3 content of composite proton exchange membranes was at 5%. Upon the introduction of 15% BaTiO3, tensile strength increased from 30.20MPa to 37.35MPa and Young’s modulus increased from 324.62MPa to 385.9MPa.
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