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Proceedings Paper

Actuation behaviour of polyaniline films and tubes prepared by phase inversion technique
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Paper Abstract

The phase inversion technique was used to produce polyaniline (PAn) actuators with different geometries that cannot be obtained by PAn cast from N-methyl-2-pyrrolidinone (NMP) solution in a conventional way. PAn was cast and coagulated in a water bath forming films and tubes with or without a platinum (Pt) wire helix as an interconnect. PAn was doped with hydrochloric solution (HCl, 1 M) (PAn/HCl) or methanesulfonic acid (MSA, 1 M) (PAn/MSA). In nitric acid (HNO3, 1 M) aqueous electrolyte, the actuation strain of PAn/HCl was 0.9% which increased to 2.0% and 2.7% for the tubes without and with the Pt helix, respectively. The Pt helix helped prevent the IR drop along the actuator. Comparing with NaNO3 (1 M) aqueous electrolyte, the use of HNO3 aqueous electrolyte gave better actuation stability where at least 100 cycles were observed and the final actuation strain was determined by the size of dopant. Change of coagulation bath from water to NMP (30% w/w)/water resulted in subtle difference in the Young’s modulus of PAn/MSA in oxidized and reduced states. PAn prepared by phase inversion technique is porous by nature, consequently it is brittle and exhibits a low actuation stress (0.3 - 0.4 MPa).

Paper Details

Date Published: 28 February 2005
PDF: 9 pages
Proc. SPIE 5649, Smart Structures, Devices, and Systems II, (28 February 2005); doi: 10.1117/12.582275
Show Author Affiliations
Binbin Xi, Univ. of Wollongong (Australia)
Van-Tan Truong, Defence Science and Technology Organisation (Australia)
Vahid Mottaghitalab, Univ. of Wollongong (Australia)
Philip Whitten, Univ. of Wollongong (Australia)
Geoffrey M. Spinks, Univ. of Wollongong (Australia)
Gordon G. Wallace, Univ. of Wollongong (Australia)

Published in SPIE Proceedings Vol. 5649:
Smart Structures, Devices, and Systems II
Said F. Al-Sarawi, Editor(s)

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