Large deformation model of ion-exchange actuators using electrochemical potentials

Eniko T. Enikov, Geon S. Seo

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


A composite actuator based on a polymer electrolyte and metal electrodes is described. Electrode deposition is described qualitatively with corresponding experimental results. A general continuum model describing the transport and deformation of solid polymer electrolyte processes is developed. The formulation is based on global integral postulates for the conservation of mass, momentum, energy, charge, and the second law of thermodynamics. The global equations are then localized in the volume and on the material surfaces bounding the polymer. The model is simplified to a three component system of a fixed negatively charged polymeric matrix, diffusing hydroxonium ions, and free water within the polymer matrix. Contrary to the existing electrostatic models, the deformation is attributed to water induced swelling. The proposed internal pressure based model includes the stress relaxation phenomenon due to water redistribution governed by Darcy's law.

Original languageEnglish (US)
Pages (from-to)199-209
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2002
EventSmart Structures and Materials 2002: Electroactive Polymer Actuators and Devices (EAPAD) - San Diego, CA, United States
Duration: Mar 18 2002Mar 21 2002


  • Darcy's law
  • Electroactive polymers
  • Ionic diffusion
  • Nernst-Planck equations

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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