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Proceedings Paper

Modeling of optical gel electroactive response
Author(s): Robert A. Paxton; Ahmed M. Al-Jumaily; Maximiano V. Ramos; Allan J. Easteal
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Paper Abstract

In this paper a model is postulated to describe the optical response of an electroactive polymer hydrogel due to applied electrical fields. This model consists of a series of several modules: an electrical module that identifies the relationship between the applied voltage/current, electrode location and material and applied electrical field; a chemical module that correlates the percentage monomer in the gel, percentage cross linker, solvent ionic strength and pH; a mechanical module that employs the output of the chemical module to calculate deformation, taking into consideration experimentally measured elastic and viscoelastic characteristics; an optical module that will incorporate results from the previous modules to yield important optical characteristics (such as focal length and refractive index). It is anticipated that ultimately this model will set the required voltage to produce particular optical characteristics. Using an elastic modulus of 2160 Pa, a Poisson's ratio of 0.33 and experimentally measured gel response force of 0.1 N has resulted in a mechanical module which fully describes the gel motion. This result is promising; however, the mechanical module is currently using elastic properties, whereas viscoelastic properties are ideally needed.

Paper Details

Date Published: 27 July 2004
PDF: 4 pages
Proc. SPIE 5385, Smart Structures and Materials 2004: Electroactive Polymer Actuators and Devices (EAPAD), (27 July 2004); doi: 10.1117/12.538721
Show Author Affiliations
Robert A. Paxton, Auckland Univ. of Technology (New Zealand)
Ahmed M. Al-Jumaily, Auckland Univ. of Technology (New Zealand)
Maximiano V. Ramos, Auckland Univ. of Technology (New Zealand)
Allan J. Easteal, Univ. of Auckland (New Zealand)

Published in SPIE Proceedings Vol. 5385:
Smart Structures and Materials 2004: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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