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Surfactant-induced core/shell phase equilibrium in hydrogels.

J Gernandt1, P Hansson1

  • 1Department of Pharmacy, Uppsala University, Box 532, SE-75123 Uppsala, Sweden.

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|February 15, 2016
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Summary
This summary is machine-generated.

This study introduces an equilibrium theory for hydrogel phase separation. It demonstrates that surfactant-induced core/shell structures can be stable under specific conditions, depending on surfactant volume and concentration.

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Area of Science:

  • Polymer Science
  • Physical Chemistry
  • Materials Science

Background:

  • Core/shell structures in hydrogels induced by surfactants are common.
  • The thermodynamic stability of these surfactant-induced hydrogel structures remains debated.

Purpose of the Study:

  • To develop an equilibrium theory for phase coexistence in hydrogels.
  • To determine the stability of surfactant-induced core/shell separation in hydrogels.

Main Methods:

  • Development of a theoretical framework for hydrogel phase behavior.
  • Analysis of phase coexistence considering surfactant properties.

Main Results:

  • The theory predicts that surfactant-induced core/shell separation can be thermodynamically stable.
  • Stability is contingent upon the volume and concentration of the added surfactant solution.
  • Phase behavior is governed by the interplay of surfactant quantity and solution properties.

Conclusions:

  • Surfactant-induced core/shell structures in hydrogels can represent stable equilibrium states.
  • The precise phase behavior and stability are controllable via surfactant solution parameters.