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Preparation and Properties of Polymer Blends Type Humidity Sensor for Process Safety  

Kang Young-Goo (Department of Safety System Engineering, Hoseo University)
Cho Myoung-Ho (Department of Safety Engineering, graduate School, Hoseo University)
Publication Information
Journal of the Korean Society of Safety / v.19, no.3, 2004 , pp. 51-56 More about this Journal
Abstract
Conductive polymer blends and composites are widely used for different safety application such as electrostatic charge dissipation(ESD), electromagnetic interference(EMI) shielding, electrostatic prevention and safety chemical sensor. In order to prepare a impedance-type humidity sensor that is durable at high humidities and high temperature, electically conductive polymer blends based on diallyldimethylammonium chloride(DADMAC) and epoxy were prepared in this study. The polymer blends type conductive ionomer exhibits reaction each other DADMAC and epoxy in FT-IR and DSC analysis. The blends material was traced by new peak at 1600cm-1 and appeard improvement of thermal resistance by melting point shift. Alumina substrate was deposited a pair of gold electrodes by screen printing. The blend material were spin-coated with a thin film type on the surface of alumina substrate. The polymer bleld type sensor exhibits a linear impedance increasing better than DADMAC coated humidity sensor. Also it shows good sensitivity, low hysteresis and durability against high humidity.
Keywords
conductive polymer; polymer blend; quaternary ammonium salt; reactive epoxy; ionomer; humidity sensor;
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Times Cited By KSCI : 1  (Citation Analysis)
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