Self-oscillations in chemoresponsive gels: A theoretical approach

Some gels can swell or shrink in function of the concentration of the solutes contained in the solvent. We develop and discuss an algorithm based on Stefan-Maxwell equations to study the dynamics of a sphere of chemoresponsive gel immersed in a medium kept far from equilibrium. We show that the coup...

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Veröffentlicht in:Chaos (Woodbury, N.Y.) N.Y.), 2005-06, Vol.15 (2), p.023703-023703-9
1. Verfasser: Boissonade, J.
Format: Artikel
Sprache:eng
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Zusammenfassung:Some gels can swell or shrink in function of the concentration of the solutes contained in the solvent. We develop and discuss an algorithm based on Stefan-Maxwell equations to study the dynamics of a sphere of chemoresponsive gel immersed in a medium kept far from equilibrium. We show that the coupling of the reaction with these volume changes creates some feedback that can lead to chemomechanical instabilities. As a result, a reaction that is not oscillatory in homogeneous conditions or in a nonresponsive gel can induce self-oscillations of volume and concentrations in a responsive gel. We also show that chemical oscillations related to long range activation can be strongly modified in such gels, even when the changes of volume are small.
ISSN:1054-1500
1089-7682
DOI:10.1063/1.1880592