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Proceedings Paper

Modeling and optimization of ionic polymer gel actuators
Author(s): Choonghee Jo; Hani E. Naguib; Roy H. Kwon
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Paper Abstract

The electro-active behavior of ionic polymer gel was modeled and the optimum condition of decision parameters that maximize the deflection of gel was investigated. An actuation model characterizing the bending deformation of polymer gel under electric field was proposed considering the chemo-electro-mechanical parameters. In the modeling, swelling or shrinking phenomenon due to the difference of concentration at the boundary between the gel and solution was considered first before the electric field is applied. Then, bending deformation under the concentration difference of ions was calculated. Differential osmotic pressure at the boundary of gel and solution determine the degree of swelling or shrinking of gel. From this actuation behavior, strain or deformation of gel is calculated. To find the optimum conditions for the deformation of gel, a non-linear constrained optimization model was proposed, where the equation for bending deflection of gel is used as the objective function and the relationship among the decision variables and the range of the variables are used as constraints. In the optimization model, electric voltage, thickness of gel, concentration of polyion in the gel, ion concentration in the solution and degree of cross-linking in gel were considered as decision variables. The predictions by the proposed model were compared with experimental data.

Paper Details

Date Published: 6 April 2009
PDF: 12 pages
Proc. SPIE 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009, 72870Z (6 April 2009); doi: 10.1117/12.815866
Show Author Affiliations
Choonghee Jo, Univ. of Toronto (Canada)
Hani E. Naguib, Univ. of Toronto (Canada)
Roy H. Kwon, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 7287:
Electroactive Polymer Actuators and Devices (EAPAD) 2009
Yoseph Bar-Cohen; Thomas Wallmersperger, Editor(s)

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