Equilibrium swelling properties of polyampholytic hydrogels

Anthony E. English, Salvador Mafé, José A. Manzanares, Xiahong Yu, Alexander Yu Grosberg, Toyoichi Tanaka

    Research output: Contribution to journalArticle

    Abstract

    The role of counter ions and ion dissociation in establishing the equilibrium swelling of balanced and unbalanced polyampholytic hydrogels has been investigated experimentally and theoretically. The swelling dependence on both the net charge offset and the external bath salt concentration has been examined using an acrylamide based polyampholytic hydrogels. By careful consideration of the swelling kinetics, we illustrate the effects of ion dissociation equilibria and counter ion shielding in polyampholytic hydrogels near their balance point where both polyelectrolyte and polyampholyte effects are present. The theory considers a Flory type swelling model where the Coulombic interactions between fixed ions in the hydrogel resemble those of an ionic solid with a Debye screening factor. Theoretical predictions from this model are in qualitative agreement with our experimental results.

    Original languageEnglish (US)
    Pages (from-to)8713-8720
    Number of pages8
    JournalJournal of Chemical Physics
    Volume104
    Issue number21
    StatePublished - Jun 1 1996

    Fingerprint

    Hydrogels
    swelling
    Swelling
    Radiation counters
    Ions
    ions
    counters
    salt baths
    Acrylamide
    Hydrogel
    dissociation
    Polyelectrolytes
    Shielding
    Screening
    Salts
    shielding
    screening
    Kinetics
    kinetics
    predictions

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    English, A. E., Mafé, S., Manzanares, J. A., Yu, X., Grosberg, A. Y., & Tanaka, T. (1996). Equilibrium swelling properties of polyampholytic hydrogels. Journal of Chemical Physics, 104(21), 8713-8720.

    Equilibrium swelling properties of polyampholytic hydrogels. / English, Anthony E.; Mafé, Salvador; Manzanares, José A.; Yu, Xiahong; Grosberg, Alexander Yu; Tanaka, Toyoichi.

    In: Journal of Chemical Physics, Vol. 104, No. 21, 01.06.1996, p. 8713-8720.

    Research output: Contribution to journalArticle

    English, AE, Mafé, S, Manzanares, JA, Yu, X, Grosberg, AY & Tanaka, T 1996, 'Equilibrium swelling properties of polyampholytic hydrogels', Journal of Chemical Physics, vol. 104, no. 21, pp. 8713-8720.
    English AE, Mafé S, Manzanares JA, Yu X, Grosberg AY, Tanaka T. Equilibrium swelling properties of polyampholytic hydrogels. Journal of Chemical Physics. 1996 Jun 1;104(21):8713-8720.
    English, Anthony E. ; Mafé, Salvador ; Manzanares, José A. ; Yu, Xiahong ; Grosberg, Alexander Yu ; Tanaka, Toyoichi. / Equilibrium swelling properties of polyampholytic hydrogels. In: Journal of Chemical Physics. 1996 ; Vol. 104, No. 21. pp. 8713-8720.
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    AU - Grosberg, Alexander Yu

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