Studies on volume phase transition of N-substituted acrylamide hydrogels

Hiroshi Inomata, Shozaburo Saito

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


The swelling equilibria of N-substituted acrylamide gels, such as N-isopropylacrylamide, N-n-propylacrylamide, N-cyclopropylacrylamide, N-ethoxyethylacrylamide gels, were measured in water at various temperature. It was found that the gels showed thermoshrinking swelling behaviors and that the swelling behaviors were strongly dependent on the N-substitutes. The swelling equilibria of the N-isopropylacrylamide gel were measured in the presence of additives (salts and organic compounds). The additives did not affect the swelling ratio but depressed the transition temperature. All these results were discussed in terms of hydrophobic interaction and additive effects on the hydration structure and it was confirmed that the hydrophobic interaction plays an important role in the thermoshrinking type phase transition. In addition, calculation results with a lattice model by Prange et al. were also presented.

Original languageEnglish
Pages (from-to)291-302
Number of pages12
JournalFluid Phase Equilibria
Issue numberpt 1
Publication statusPublished - 1993
EventProceedings of the 6th International Conference on Fluid Properties and Phase Equilibria for Chemical Process Design 1992 - Cortina d'Ampezzo, Italy
Duration: 1992 Jul 191992 Jul 24

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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