22 May 1995 Electrically induced dynamic contraction of ionic polymeric gels
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Abstract
An analytical model is presented for the dynamics of contraction of ionic polymeric gels with liquid exudation in the presence of an electrical field. The proposed model considers the dynamic balance between the internal forces during the contraction. These forces are assumed to be due to the viscous effects caused by the motion of the liquid, the inertial forces due to the motion of the liquid in and out of the network, and the electrophoretic forces due to the motion of the charged ions in the solvent as it exudes from the ionic polymeric gel network. The effects of rubber elasticity of the network as well as ion-ion interactions have been assumed negligible in this case compared with the inertial, viscous, and electrophoretic effects. The governing equations, thus obtained, are then solved exactly for the velocity of liquid exudation from within the network as a function of time and radial distance in cylindrical samples. The relative weight of the gel sample is then related to this velocity by an integral equation. This integral equation is then numerically solved to obtain a relationship between the amount of contraction as a function of time, electric field strength, and other pertinent material and geometrical parameters. The results of the numerical simulations are compared with some experimental results on PAMPS contractile fibers and satisfactory agreements are observed.
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Mohsen Shahinpoor, Yoshihito Osada, "Electrically induced dynamic contraction of ionic polymeric gels", Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); doi: 10.1117/12.209818; https://doi.org/10.1117/12.209818
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