Characterization and modeling of conjugated polymer sensors

Yang Fang; Xiaobo Tan; Andrew Temme; Gürsel Alici

doi:10.1117/12.776538

10 April 2008 Characterization and modeling of conjugated polymer sensors

Yang Fang, Xiaobo Tan, Andrew Temme, Gürsel Alici

Proceedings Volume 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008; 692709 (2008) https://doi.org/10.1117/12.776538
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

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.

Citation Download Citation

Yang Fang, Xiaobo Tan, Andrew Temme, and Gürsel Alici "Characterization and modeling of conjugated polymer sensors", Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 692709 (10 April 2008); https://doi.org/10.1117/12.776538

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