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Gas and vapour detection using polypyrrole

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Author: Leur, R.H.M. van de · Waal, A. van der
Type:article
Date:1999
Publisher: Elsevier Sequoia SA
Place: Lausanne, Switzerland
Institution: TNO Industrie
Source:Synthetic Metals, 1-3, 102, 1330-1331
Identifier: 235047
doi: doi:10.1016/S0379-6779(98)01055-8
Keywords: Traffic · Chemical sensors · Composition effects · Electric conductivity · Electrochemistry · Organic solvents · Synthesis (chemical) · Temperature · Vapors · Butanon · Vapor detection · Polypyrroles

Abstract

The vapours of organic solvents like toluene, butanon, and ethanol do effect the electrical conductivity of electrochemically synthesised polypyrrole. This property allows the use of polypyrrole in sensors for vapour detection. The conductivity is also a function of temperature and the history of the sensor. When exposed to water vapour, the conductivity decreases. Moreover, the polymer degrades during exposure to humid air.