Gas-transport properties through cation-exchanged sulfonated polysulfone membranes

Ho Bum Park, Sang Yong Nam, Ji Won Rhim, Jung Min Lee, Sun E. Kim, Jung Ran Kim, Young Moo Lee

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Sulfonated polysulfone (SPS) membranes were prepared, and the gas-transport properties of the resulting ionic polymers were examined. Gas-transport measurements were made on dense films of these polymers with a continuous flow technique. The sulfonation of polysulfone and the metal-cation exchange of SPS were confirmed with Fourier transform infrared spectroscopy and electron spectroscopy for chemical analysis. The SPS membranes exchanged with the monovalent metal ions showed higher permeability coefficients than the SPS membranes exchanged with the multivalent metal ions, whereas the selectivities of all the metal-cation-exchanged sulfonated polysulfone (MeSPS) membranes for O2/N2 and CO2/N2 gas pairs were higher than those of SPS membranes. When the MeSPS membranes with metal cations of similar ionic radii were compared, the ideal selectivities of O2/N2 and CO2/N2 through MeSPS with divalent cations were higher than those through MeSPS with monovalent cations.

Original languageEnglish
Pages (from-to)2611-2617
Number of pages7
JournalJournal of Applied Polymer Science
Issue number10
StatePublished - 2002 Dec 5


  • Diffusion
  • Gas permeation
  • Ionomers
  • Membranes

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