Chemoelastodynamics of Responsive Gels

Boissonade, J.; Borckmans, Pierre; Kepper, P. De; Métens, Stephane

doi:10.1002/9783527632602.ch9

Cited by 3 publications

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“…Siegel et al use the hysteresis of the volumic transition in a membrane made of a gel responsive to pH to modulate its porosity and the coupling through this membrane of two compartments where an autocatalytic reaction takes place, leading to chemical oscillations [14][15][16]. Instead, we proposed to take advantage of chemical bistability and to use the volume changes caused by swelling/shrinking as a feedback [17][18][19]. This was partly supported by a series of experiments performed with the chlorite-tetrathionate (CT) reaction in a poly(NiPAA-co-AA) gel [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Although our former work [17][18][19][20][21][22] have clearly demonstrated the validity of chemical spatial bistability as a potential source of oscillations, there were still two sorts of problems to be solved to get a coherent whole. First, even in a non-responsive gel, the CT reaction exhibits, in addition to spatial bistability, complex dynamics [23] which perturbs the interpretations.…”

Section: Introductionmentioning

confidence: 99%

“…One does not need an oscillating reaction, only a much more common bistable one, to produce such a chemomechanical instability. Some models have been proposed to predict the dynamics of swelling in neutral gels without reaction [31][32][33][34][35][36][37] or with reaction [9,13,18,19]. In the second case, the chemical sensitivity of the gel is descibed by an assumed and somewhat arbitrary dependence of the Flory parameter χ, which gathers all the energetic interactions of monomer and solvent molecules, on the concentration of a chemical species.…”

Section: Introductionmentioning

confidence: 99%

“…Beforehand, we shall briefly summarize the principles of the chemo-mechanical instability. For more extensive developments on spatial bistability see [23,24] and on the chemo-mechanical instability itself, see [18,19,23].…”

Section: Introductionmentioning

confidence: 99%

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Oscillatory dynamics induced in polyelectrolyte gels by a non-oscillatory reaction: A model

Boissonade

2009

Eur. Phys. J. E

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Abstract. 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 nonequilibrium 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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oscillatory dynamics induced in polyelectrolyte gels by a non-oscillatory reaction: A model

Boissonade

2009

Eur. Phys. J. E

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Studien Zu Den Epitaphien Des Manuel Philes

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Viewpoint: Homeostasis as Inspiration—Toward Interactive Materials

2020

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are driven by homeostasis working in microcosm: modules of "mini-homeostasis" in which one component responds to a stimulus and another opposes the response, driving the module to restore its initial state. The coupling of responsive and restoring processes ensures self-regulation, but also allows for an unexpected consequence: perturbations of these modules can trigger various, nontrivial behaviors. Hormones and other stimuli can change heartbeat patterns and rhythms, blue light and chemicals can shorten or lengthen periods of cellular clocks, while the earth's orbit shapes seasonal weather patterns.Mini-homeostasis modules naturally couple a variety of physical and chemical processes, which often operate on and across different spatial and temporal scales. For example, locally induced gradients in ocean temperature or salinity are counteracted by global currents. The diversity of the module's responses to perturbations depends on the nature of the opposing processes and on the type of perturbation. When the initial response and the restoring force work across different length and time scales, the interactive behavior becomes particularly interesting and can include all kinds of patterns, dynamics, and complex kinetic phenomena. This interactivity, a hitherto underexplored aspect of homeostasis, is inspiring for materials design not only for the ability to program and create dynamic behavior, but also because it shows how such behaviors-resulting from the restoring aspect of mini-homeostasis-could potentially be mechanistically linked to resilience. Mini-homeostasis implemented in synthetic materials could thus produce a diverse set

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Chemoelastodynamics of Responsive Gels

Cited by 3 publications

References 60 publications

Oscillatory dynamics induced in polyelectrolyte gels by a non-oscillatory reaction: A model

Oscillatory dynamics induced in polyelectrolyte gels by a non-oscillatory reaction: A model

Studien Zu Den Epitaphien Des Manuel Philes

Viewpoint: Homeostasis as Inspiration—Toward Interactive Materials

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