Self-Oscillatory Actuation at Constant DC Voltage with pH-Sensitive Chitosan/Polyaniline Hydrogel Blend
2006-11-07 10:12:42 조회수716
Seon Jeong Kim,† Min Sup Kim,† Sun I. Kim,† Geoffrey M. Spinks,*,‡ Byung Chul Kim,‡ and Gordon G. Wallace‡ Center for Bio-Artificial Muscle and Department of Biomedical Engineering, Hanyang UniVersity, Seoul, Korea, ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, UniVersity of Wollongong, Northfields AVenue, Wollongong, NSW 2522, Australia 원문 링크 :


Hydrogels constructed from semi-interpenetrating polymer networks (semi-IPNs) of chitosan and
polyaniline (CP) were prepared and the effect of various pH (1, 4, 7, 10) levels on the equilibrium water
content (EWC) and electromechanical response were investigated. In swelling experiments, the freezedried
membranes exhibited a high EWC value in acidic conditions. The electromechanical behavior of
the CP membranes was also measured in a direct current electric field in pH buffer solutions. The electric
potential induced bending actuation in the membrane, with the direction of bending being reversed in
acidic and basic solutions. A novel oscillatory bending was observed in neutral electrolyte, which may
ultimately prove useful as a simple propulsion mechanism in fishlike swimming robots or for simple

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