Evidence of shear-induced polymer release from a swollen gel particle

Sylvie Vervoort; Tatiana Budtova

Evidence of shear-induced polymer release from a swollen gel particle

Sylvie Vervoort ¹ Tatiana Budtova ¹

1 CEMEF - Centre de Mise en Forme des Matériaux

Abstract : The influence of simple shear flow on the behaviour of an isolated polyelectrolyte hydrogel particle swollen in an aqueous hydroxypropylcellulose solution was studied by rheo-optics. When submitted to a constant shear stress, an initially spherical particle deforms quickly to adopt a stable ellipsoidal form. Upon reaching a first stress threshold, some liquid is released from the particle. This liquid release is determined by a critical deformation value above which the gel cannot retain all of its solvent. At stresses above a second threshold value, small droplets of liquid are secreted from the particle and move away in the flow direction.

Keywords : hydrogel deformation controlled release simple shear flow

Type de document :

Communication dans un congrès

Domaine :

Sciences de l'ingénieur [physics] / Matériaux

Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-00531757
Contributeur : Corinne Matarasso <>
Soumis le : mercredi 3 novembre 2010 - 16:43:04
Dernière modification le : lundi 12 novembre 2018 - 11:00:33

Evidence of shear-induced polymer release from a swollen gel particle

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Evidence of shear-induced polymer release from a swollen gel particle

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