Solution-cast Nafion

R.F. Silva, M. De Francesco, A. Pozio

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Abstract

Perfluorosulfonate ionomer dispersions in three different solvents (ethylene glycol (EG), dimethyl sulfoxide (DMSO) and dimethylformamide (DMF)) were used to prepare solution-cast membranes. The dispersions were obtained by dissolution of Nafion®112 membranes in a reactor using a water-ethanol solution. Measurements of water uptake and solubility of the cast membranes were conducted. Conductivities were measured directly on carbon paper/membrane/carbon paper assemblies fully immersed in deionized water and were registered by means of impedance spectroscopy as a function of temperature. Results show that all cast samples have lower chemical stability than commercial membranes. Moreover, only membranes cast from dimethylformamide-based dispersions gave conductivity performance comparable to those of Nafion®112 and 115. Casting process from dispersion obtained using Nafion®rejects gave better results than the process utilizing commercial dispersion. © 2004 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)3211 - 3219
Number of pages9
JournalElectrochimica Acta
Volume49
Issue number19
DOIs
Publication statusPublished - 15 Aug 2004

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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