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Proceedings Paper

Characterization and modeling of conjugated polymer sensors
Author(s): Yang Fang; Xiaobo Tan; Andrew Temme; Gürsel Alici
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Paper Abstract

In this paper the behavior of conjugated polymers as mechanical sensors is experimentally characterized and modeled. A trilayer conjugated polymer sensor is considered, where two polypyrrole (PPy) layers sandwich an amorphous polyvinylidene fluoride (PVDF) layer, with the latter serving as an electrolyte tank. A theory for the sensing mechanism is proposed by postulating that, through its influence on the pore structure, mechanical deformation correlates directly to the concentration of ions at the PPy/PVDF interface. This provides a key boundary condition for the partial differential equation (PDE) governing the ion diffusion and migration dynamics. By ignoring the migration term in the PDE, an analytical model is obtained in the form of a transfer function that relates the open-circuit sensing voltage to the mechanical input. The model is validated in experiments using dynamic mechanical stimuli up to 50 Hz.

Paper Details

Date Published: 10 April 2008
PDF: 9 pages
Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 692709 (10 April 2008); doi: 10.1117/12.776538
Show Author Affiliations
Yang Fang, Michigan State Univ. (United States)
Xiaobo Tan, Michigan State Univ. (United States)
Andrew Temme, Michigan State Univ. (United States)
Gürsel Alici, Univ. of Wollongong (Australia)

Published in SPIE Proceedings Vol. 6927:
Electroactive Polymer Actuators and Devices (EAPAD) 2008
Yoseph Bar-Cohen, Editor(s)

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