Equilibrium swelling of core–shell composite microgels

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A model is developed in finite elasticity of microgels subjected to swelling. Constitutive equations are derived by means of the free energy imbalance relation for an arbitrary three-dimensional deformation with finite strains. The governing equations are applied to the analysis of equilibrium swelling of a core–shell microgel particle with a rigid core and a soft shell. The stress–strain relations involve six material constants whose effect on polymer density profile and distribution of stresses is analyzed numerically. In accord with observations, the model predicts that volume fraction of the polymer network decreases sharply near the core–shell interface, becomes practically constant in the central part of the shell, and decays to zero near the outer surface of a spherical particle.

Original languageEnglish
Pages (from-to)1579-1592
Number of pages14
JournalMeccanica
Volume50
Issue number6
DOIs
StatePublished - 1 Jun 2015
Externally publishedYes

Keywords

  • Constitutive modeling
  • Core–shell microgel
  • Finite elasticity
  • Swelling

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