Modeling and optimization of ionic polymer gel actuators

Choonghee Jo; Hani E. Naguib; Roy H. Kwon

doi:10.1117/12.815866

6 April 2009 Modeling and optimization of ionic polymer gel actuators

Choonghee Jo, Hani E. Naguib, Roy H. Kwon

Proceedings Volume 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009; 72870Z (2009) https://doi.org/10.1117/12.815866
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

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.

Citation Download Citation

Choonghee Jo, Hani E. Naguib, and Roy H. Kwon "Modeling and optimization of ionic polymer gel actuators", Proc. SPIE 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009, 72870Z (6 April 2009); https://doi.org/10.1117/12.815866

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