Mass transfer in pH-sensitive hydrogels

Stevin H. Gehrke, E. L. Cussler

Research output: Contribution to journalArticlepeer-review

115 Scopus citations


This paper describes measurements of solute and solvent transport in swollen, swelling, and collapsing hydrogels. Solute diffusion in swollen gels follows Fick's law, with diffusion coefficients varying only slightly with the degree of swelling. Solvent diffusion into swelling gels is affected both by Fick's law and by the rates of ion exchange. Solvent diffusion in collapsing gels is faster than that in swelling gels, and is effectively described by Fick's law.

Original languageEnglish (US)
Pages (from-to)559-566
Number of pages8
JournalChemical Engineering Science
Issue number3
StatePublished - 1989

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