An Electronic Nose for Amine Detection Based on Polymer/SWNT-COOH Nanocomposites
Abstract- An Electronic Nose system based on polymer/carboxylic-functionalized single-walled carbon nanotubes was developed for sensing various volatile amines such as dimethylamine, dipropylmine, pyridine, and ammonia solution. The SWNT-COOH were dispersed in the matrix of different polymer; polyvinyl chloride, cumene terminated polystyrene-maleic anhydride (cumene-PSMA), poly(styrene-co-maleic) partial isobutyl/ methyl mixed ester(PSE), and polyvinylpyrrolidon(PVP). These composites were dropped on interdigitated gold electrodes to make the gas sensors . The response of these sensors to volatile amines was studied by both static and dynamic flow measurement. By using a simple pattern recognition based on the principle component analysis(PCP) , the volatile amines can be discriminated. This Electronic Nose will be usefull for monitoring the freshness of foods and farm air quality.