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Communication Dans Un Congrès Année : 2003

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

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Résumé

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.

Dates et versions

hal-00531757 , version 1 (03-11-2010)

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Sylvie Vervoort, Tatiana Budtova. Evidence of shear-induced polymer release from a swollen gel particle. Colloquium on Formula III - New Concepts and Strategies in Formulation, Oct 2001, Montpellier, France. p.553-558, ⟨10.1002/pi.1131⟩. ⟨hal-00531757⟩
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