Swelling of poly(vinylamine) gels: Applicability of the Donnan theory

Kyung Do Suh, Young Chan Bae, Jin Woong Kim, Shiro Kobayashi

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Abstract

The volume swelling behaviors of poly(vinyl amine) (PVAm) gels were predicted on the basis of the Donnan theory with the ionic strength of KCl solutions at three different pH (acidic, basic, neutral solution). At neutral (pH 7) and basic (pH 11) conditions, maximum volume swellings were observed in the intermediate concentration of KCl due to the difference in the ionic swelling pressure with the salt concentration. On the contrary, at acidic (pH 3) condition, maximum volume swelling was not found. This was attributed to the full dissociation of the amino groups of PVAm gels even at very low concentration of KCl. In the comparison of the experimental results with the theoretical ones, the experimental results agreed fairly well with the simple Donnan theory, verifying a possible application of the Donnan theory to the prediction of the cation-typed gels.

Original languageEnglish
Pages (from-to)507-516
Number of pages10
JournalJournal of Macromolecular Science - Pure and Applied Chemistry
Volume36 A
Issue number4
DOIs
Publication statusPublished - 1999 Jan 1

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Keywords

  • Cation-Typed Gels
  • Donnan Theory
  • Ionic Strength
  • Poly(vinyl Amine) Gels
  • Swelling Behaviors
  • Three Different pH

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