Oscillatory dynamics induced in polyelectrolyte gels by a non-oscillatory reaction: a model.
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 nonoscillatory 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.
Boissonade
J
J
Université de Bordeaux and CNRS, Centre de Recherche Paul Pascal, Pessac, France. boisson@crpp-bordeaux.cnrs.fr
D001672:Biocompatible Materials / Q000737:chemistry*; D002384:Catalysis; D004573:Electrolytes; D005782:Gels; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008422:Materials Testing; D008956:Models, Chemical; D017711:Nonlinear Dynamics; D009991:Oscillometry / Q000379:methods*; D012997:Solvents / Q000737:chemistry
D001672:Biocompatible Materials; D004573:Electrolytes; D005782:Gels; D007477:Ions; D012997:Solvents