Kinetics of shear-induced gel deswelling/solvent release

Zeo Undina (1) , Elena Tarabukina (1, 2) , Tatiana Budtova (1)

1 CEMEF - Centre de Mise en Forme des Matériaux
2 Institute of Macromolecular Compounds

The previous termkinetics of shear-induced deswelling of gelnext term particles based on synthetic (sodium polyacrylate) and natural (alginate) polymers was studied by rheo-optical technique. A swollen spherical previous termgelnext term particle of 100 ± 50 μm diameter was placed in silicone oil and the evolution of the previous termgelnext term size as a function of time and previous termshearnext term rate was monitored. Different aqueous polymer solutions were used as synthetic previous termgel solvent:next term polyvinylpyrrolidone, hydroxypropyl cellulose and glucose-based polymer. The interfacial tension (previous termgel solvent)next term/(silicone oil), previous termgelnext term degree of swelling, previous termsolventnext term quality and viscosity are the main parameters influencing the previous termkinetics of shear-induced gel deswelling. The kinetics of gelnext term volume loss was approximated by a modified Weibull equation.

Mots clés: Gels; Shear-induced releasenext term; Interfacial tension

Domaines: Matériaux

Zeo Undina, Elena Tarabukina, Tatiana Budtova. Kinetics of shear-induced gel deswelling/solvent release. Journal of Controlled Release, 2005, 108 (1), pp.Pages 73-83. ⟨10.1016/j.jconrel.2005.07.012⟩. ⟨hal-00574188⟩