UNSPECIFIED (2003) A preliminary study of conducting polymers as microvalve seals. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 355 (1-2). pp. 62-67. ISSN 0921-5093

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Abstract

We report here on the first investigation into the behaviour of conducting polymers as seals for microvalves. Poly(pyrrole) is known to be reasonably stable in air and is also one of the easiest conducting polymers to synthesise either by chemical or electrochemical polymerisation. It is known to offer interesting tribological properties and so is chosen as the exemplar material here. Poly(pyrrole) with three dopants, namely 1-decanesulfonate (DSA), methylphosphonate (MPA) and 1-butanesulfonate (BSA) films were deposited electrochemically with a thickness between 0.5 and 1.5 mum, on gold electrodes patterned on Si-wafer (4 x 4 mm). Test results show that the leakage rate for the PPY films can be down to 0.5 cm(3) min(-1). The PPY films doped with MPA have the best performance. The effects of the choice of the electrochemical deposition conditions and resulting morphology, the film thickness and the choice of counter-ions on the leakage rate are also discussed. (C) 2003 Elsevier Science B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	T Technology T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title:	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Publisher:	ELSEVIER SCIENCE SA
ISSN:	0921-5093
Date:	25 August 2003
Volume:	355
Number:	1-2
Number of Pages:	6
Page Range:	pp. 62-67
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9526

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