Large deformation and electrochemistry of polyelectrolyte gels
Large deformation and electrochemistry of polyelectrolyte gels
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DOI：
10.1016/j.jmps.2010.01.005
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发表时间：
2010-04-01
影响因子：
5.3
通讯作者：
Suo, Zhigang
中科院分区：
文献类型：
--
作者：
Hong, Wei;Zhao, Xuanhe;Suo, Zhigang
浸入离子溶液中，聚电解质的网络吸收溶液并溶胀，从而形成凝胶。溶胀是可逆的，并且溶胀的量由离子浓度、机械力和电势调节。本文发展了一种耦合大变形和电化学的场论。一个特定的材料模型进行了描述，包括拉伸网络的影响，混合的聚合物与溶剂和离子，和极化的凝胶。我们表明，在凝胶中的渗透压的概念一般没有实验意义，但在特定的材料模型内获得了物理解释。该理论被用来分析几种现象：凝胶在离子溶液中自由溶胀，凝胶在基底的约束下溶胀，在凝胶和外部溶液之间的界面处的双电层，以及小尺寸凝胶的溶胀。(C)2010爱思唯尔有限公司版权所有。
Immersed in an ionic solution, a network of polyelectrolytes imbibes the solution and swells, resulting in a polyelectrolyte gel. The swelling is reversible, and the amount of swelling is regulated by ionic concentrations, mechanical forces, and electric potentials. This paper develops a field theory to couple large deformation and electrochemistry. A specific material model is described, including the effects of stretching the network, mixing the polymers with the solvent and ions, and polarizing the gel. We show that the notion of osmotic pressure in a gel has no experimental significance in general, but acquires a physical interpretation within the specific material model. The theory is used to analyze several phenomena: a gel swells freely in an ionic solution, a gel swells under a constraint of a substrate, electric double layer at the interface between the gel and the external solution, and swelling of a gel of a small size. (C) 2010 Elsevier Ltd. All rights reserved.