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Pré-Publication, Document De Travail Année : 2008

Oscillatory Dynamics Induced in Polyelectrolyte Gels by a Non-Oscillatory Reaction: A Model.

Jacques Boissonade
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Résumé

We develop a general model and the associated numerical algorithm to compute the swelling dynamics of chemo-responsive polyelectrolyte gels immersed in a reactive ionic solution kept at a non-equilibrium stationary state by a permanent feed of fresh reactants. Using an autocatalytic bistable but non-oscillatory reaction, namely, the bromate-sulfite reaction, we predict that a piece of hydrogel that swells/shrinks as a function of pH, can exhibit spontaneous mechanical and chemical oscillations. This constitutes the extension to realistic and experimentally feasible conditions of results previously obtained on a toy model with artificial swelling conditions.
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Dates et versions

hal-00324000 , version 1 (23-09-2008)
hal-00324000 , version 2 (19-01-2009)

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  • HAL Id : hal-00324000 , version 1

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Jacques Boissonade. Oscillatory Dynamics Induced in Polyelectrolyte Gels by a Non-Oscillatory Reaction: A Model.. 2008. ⟨hal-00324000v1⟩
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