Modeling phase transitions and sorption desorption kinetics in thermo-sensitive gels for controlled drug delivery systems

  • Colombo I
  • Grassi M
  • Fermeglia M
 et al. 
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Abstract

Phase equilibrium and kinetic models for describing the swelling of hydrogels are considered. The swelling equilibrium model is based on an effective Flory-Huggins model coupled with a phantom network model in the framework of the Flory-Rehner theory. The kinetic model used is that proposed by Camera-Roda and Sarti, which is capable to describe non Fickian diffusion that occures in hydrogels. The models are coupled and applied to non charged thermo-sensitive hydrogels and the results obtained show a good agreement between experimental and calculated data.

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