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Proceedings Paper

CP actuator based on chemically deposited polypyrrole and PU based solid polymer electrolyte working in air
Author(s): Hwa Jeong Choi; Hyun-Ok Lim; Ildoo Chung; Kwang-Sun Ryu; Nam-Ju Jo
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Paper Abstract

Conducting polymers (CPs), such as polypyrrole, polythiophene and polyaniline, are unique in that they have switchable properties due to their two or more mechanically stable oxidation state. Thus, their films or coatings can be easily switched by the application of small voltage and current to change volume during their electrochemical redox process. In particular, polypyrrole (PPy) has been studied most extensively because of its high electrical conductivity and good environmental stability under ambient condition. In this work, we have studied a new CP actuator, fully polymeric, assembled with two PPy film electrodes and a solid polymer electrolyte (SPE), polyurethane/Mg(ClO4)2. Polyurethanes (PUs) were synthesized from 4,4'-diphenylmethane diisocyanate (MDI), 1,4-butanediol (1,4-BD) and three types of polyols, poly(ethylene glycol) (PEG), poly(propylene glycol) (PPG), and PPG-block-PEG-block-PPG (PPG-co-PEG). The chemical polymerization of PPy by immersion in Py monomer aqueous solution and oxidant aqueous solution is an adequate method to prepare PU/PPy composite film as actuator. To find the proper thickness of PPy coating layer for actuation, we measured the displacement of actuators according to the thickness of PPy coating layer. And, the displacement of all actuators was discussed in connection with the properties of SPE and PPy. All the results obtained in this work show the feasibility of electrochemomechanical devices based on PPy and SPE film able to work in air.

Paper Details

Date Published: 1 November 2007
PDF: 8 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64230L (1 November 2007); doi: 10.1117/12.779308
Show Author Affiliations
Hwa Jeong Choi, Pusan National Univ. (South Korea)
Hyun-Ok Lim, Pusan National Univ. (South Korea)
Ildoo Chung, Pusan National Univ. (South Korea)
Kwang-Sun Ryu, Univ. of Ulsan (South Korea)
Nam-Ju Jo, Pusan National Univ. (South Korea)


Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering

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