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Electropolymerized Conducting Polymer as Actuator and Sensor Device: An Undergraduate Electrochemical Laboratory Experiment

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María T. Cortés and Juan C. Moreno

Department of Chemistry, Universidad de los Andes, Bogotá, Columbia

J. Chem. Educ., 2005, 82 (9), p 1372

DOI: 10.1021/ed082p1372

Publication Date (Web): September 1, 2005

Section:

History, Education, and Documentation

Abstract

A trilayer formed by two conducting polymer films sandwiched around an adhesive polymer layer works as actuator and sensor simultaneously. This device can be bent up to ±180° and it can be used as a sensing device of physical chemistry parameters such as cell temperature and electrolyte concentration. In this article, it is shown in a didactic way how to electrochemically synthesize ClO₄^–-doped polypyrrole (PPy) films, how to fabricate a trilayer device, and how to evaluate its actuating and sensing capabilities. The required materials are simple and a complicated setup is not necessary. A laboratory exercise that introduces the actuating properties of polypyrrole as well as the temperature-sensing capabilities of PPy can be used to expose students to electrochemical and smart materials principles.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Demonstrations

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Electrochemistry

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