Colloid and Polymer Science

, Volume 272, Issue 8, pp 971–978 | Cite as

Nonisothermal membrane phenomena across perfluorosulfonic acid-type membranes, Flemion S: part I. Thermoosmosis and transported entropy of water

  • T. Suzuki
  • Y. Takahashi
  • R. Kiyono
  • M. Tasaka
Original Contributions


Solvent transports across the perfluorosulfonic acid-type membrane Flemion S were measured for aqueous electrolyte solutions under a temperature difference and under an osmotic pressure difference. H+, Li+, Na+, K+, NH 4 + , CH3NH 3 + , (CH3)2NH 2 + , (CH3)3NH+, (CH3)4N+, (C2H5)4N+, (n-C3H7)4N+ and (n-C4H9)4N+ were used as counterions. Water flux across the membrane in HCl solution is higher than that in the other electrolyte solutions because hydrogen ions can exchange with the hydrogen of the neighbor water molecules and contribute to the water transport across the membrane as a proton jump in conductivity. The direction of thermoosmosis across the membrane in HCl, NaCl, (CH3)4NCl and (C2H5)4NCl solutions was from the cold side to the hot side and that in LiCl, KCl, NH4Cl, CH3NH3Cl, (CH3)2NH2Cl and (n-C4H9)4NBr solutions was from the hot side to the cold side, although thermoosmosis across anion-exchange membranes always occurs toward the hot side.

Key words

Cation-exchange membranes osmosis perfluorosulfonic acid membranes thermoosmosis transported entropy 


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Copyright information

© Steinkopff-Verlag 1994

Authors and Affiliations

  • T. Suzuki
    • 1
  • Y. Takahashi
    • 1
  • R. Kiyono
    • 1
  • M. Tasaka
    • 1
  1. 1.Department of Materials Science and Engineering, Graduate School of Science and TechnologyShinshu UniversityNaganoJapan

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