Titre du document / Document title

Experimental analysis of current and deformation of ion-exchange polymer metal composite actuators

Auteur(s) / Author(s)

ENIKOV E. T. ⁽¹⁾ ; SEO G. S. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Aerospace and Mechanical Engineering, University of Arizona, Tucsim, AZ 85721, ETATS-UNIS

Résumé / Abstract

In this paper we describe the experimental analysis of a novel ion-exchange polymer metal composite (IPMC) actuator under large external voltage. The experimental analysis is supplemented with a coupled thermodynamic model, which includes mass transport across the thickness of the polymer actuator, chemical reactions at boundaries, and deformation as a function of the solvent (water) distribution. In this paper, the case of large electrode potentials (over 1.2 V) has been analyzed experimentally and theoretically. At these voltage levels, electrochemical reactions take place at both electrodes. These are used in the framework of overpotential theory to develop boundary conditions for the water transport in the bulk of polymer. The model is then simplified to a three-component system comprised of a fixed negatively charged polymeric matrix, protons, and free water molecules within the polymer matrix. Among these species, water molecules are considered to be the dominant species responsible for the deformation of the IPMC actuators. Experiments conducted at different initial water contents are described and discussed in the context of the proposed deformation mechanism. Comparison of numerical simulations with experimental data shows good agreement.

Revue / Journal Title

Experimental mechanics   ISSN 0014-4851   CODEN EXMCAZ 

Source / Source

2005, vol. 45, n^o4, pp. 383-391 [9 page(s) (article)] (28 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (1961) (Revue)

Mots-clés anglais / English Keywords

Swelling ; Modeling ; Thermodynamic model ; Fuel cell ; Water content ; Water ; Electrochemical properties ; Electrodes ; Water distribution ; Chemical reaction ; Polymer ; Composite material ; Ion exchange membrane ; Actuator ;

Mots-clés français / French Keywords

Gonflement ; Modélisation ; Modèle thermodynamique ; Pile combustible ; Teneur eau ; Eau ; Propriété électrochimique ; Electrode ; Distribution eau ; Réaction chimique ; Polymère ; Matériau composite ; Membrane échangeuse ion ; Actionneur ;

Mots-clés espagnols / Spanish Keywords

Inflamiento ; Modelización ; Modelo termodinámico ; Pila combustión ; Dosis agua ; Agua ; Propiedad electroquímica ; Electrodo ; Distribución agua ; Reacción química ; Polímero ; Material compuesto ; Membrana cambiadora iónica ; Accionador ;

Mots-clés d'auteur / Author Keywords

IPMC actuators ; fuel cell ; overpotential theory ; water transport ; swelling ;

Localisation / Location

INIST-CNRS, Cote INIST : 6584, 35400013235701.0100