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
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DOI：
10.1140/epje/i2008-10425-1
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发表时间：
2009-03-01
影响因子：
1.8
通讯作者：
Boissonade, J.
中科院分区：
文献类型：
--
作者：
Boissonade, J.
我们开发了一个通用的模型和相关的数值算法来计算化学响应性凝胶的溶胀动力学浸没在一个反应性的离子溶液保持在一个非平衡的固定状态，由一个永久的饲料新鲜的反应物。使用一个自催化的非振荡反应，即溴酸盐-亚硫酸盐反应，我们预测，一块水凝胶的膨胀/收缩作为pH值的函数可以表现出自发的机械和化学振荡。这构成了对先前在具有人工膨胀条件的玩具模型上获得的结果的现实和实验可行条件的扩展。
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.