Adsorption properties of water vapor on sulfonated perfluoropolymer membranes

Hiroki Takata, Nobukazu Mizuno, Masabumi Nishikawa, Satoshi Fukada, Masaru Yoshitake

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


The key phenomena in the electrolyte membrane for the adequate water management are water adsorption, water diffusion, electro-osmotic drag and water generation. The adsorption properties of water vapor on the membrane were quantified in this study as a first step of quantitative elucidation of these water transport phenomena. The relationship among the amount of adsorbed water on Flemion® membrane, partial pressure of water vapor and temperature was measured by using a micro balance and a thermohygrometer. The experimental values obtained in this study form sigmoid curves, and the adsorption model developed from finite layer B.E.T. equation can elucidate these experimental values. It was confirmed that the adsorption model can be applied also to Nafion® membrane and that applicable range of this model is from 10 to 80 {ring operator} C. Moreover, it was found in this study that the amount of clustered water has close relation with the proton conductivity of the membrane.

Original languageEnglish
Pages (from-to)371-379
Number of pages9
JournalInternational Journal of Hydrogen Energy
Issue number3
Publication statusPublished - Mar 1 2007

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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