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2018 | 107 | 150-159
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Nanocomposite Sulfonated PVDF-TiO2 Membranes as a Potential Alternative for Nafion

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Fuel cell is an alternative renewable energy source which potentially able to replace a fossil fuel. Nowadays, common fuel cell membrane generally used is Nafion. PVDF polymer is another synthetic polymer which has excellent physical and chemical properties. The purpose of this research is to synthesize an alternative fuel cell membrane, using sulfonated PVDF doped with TiO2 nanoparticles. Sol-gel method was performed to synthesize TiO2 nanoparticles, with TiCl4 as precursor. PVDF membranes with variation of TiO2 composition (0, 1, 1.5, and 2%) were prepared with ultrasonic method. The composite membranes then were sulfonated with concentrated sulfuric acid. The composite membranes were characterized with FTIR for functional group analysis, SEM-EDX for morphology analysis, acid-base titration for degree of sulfonation, weight difference for degree of water uptake, and four point lines for conductivity. FTIR spectra of the sulfonated membrane show the existence of sulfonic group at wavenumber of 601, 1400, and 1454 cm-1. The result of SEM-EDX analysis shows that the nanoparticles of TiO2 were not distributed homogenously. Degree of sulfonation of the PVDF-TiO2 2% composite membrane is 19.54%, and its water uptake is 23.34%. The highest conductivity is about 3.17 × 10-3 S cm-1 for the PVDF-TiO2 2% composite membrane that is very close to Nafion’s conductivity, 6.08 × 10-3 S cm-1.
Physical description
  • Department of Chemistry, Universitas Padjadjaran, Jatinangor Sumedang 45363, Indonesia
  • Department of Chemistry, Universitas Padjadjaran, Jatinangor Sumedang 45363, Indonesia
  • Department of Chemistry, Universitas Padjadjaran, Jatinangor Sumedang 45363, Indonesia
  • Department of Chemistry, Universitas Padjadjaran, Jatinangor Sumedang 45363, Indonesia
  • Research Center for Chemistry, Indonesian Institute of Science, Bandung 40135, Indonesia
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