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http://dx.doi.org/10.5369/JSST.2006.15.3.205

Sensing characteristics of polyaniline sensor coated with porous PVDF layers to methanol gas under various humidity conditions  

Lim, Cheol-Beom (Department of Material Science Metallurgy, Kyungpook National University)
Sohn, Sung-Ok (Department of Material Science Metallurgy, Kyungpook National University)
Huh, Jeung-Soo (Department of Material Science Metallurgy, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.15, no.3, 2006 , pp. 205-210 More about this Journal
Abstract
Hydrophobic polymer [ex. Poly(vinylidenfluoride)] layer was coated on polyaniline (PANi) sensor to reduce the contamination humidity. The differences in sensitivity to methanol gas detection in various humidity condition between pure-PANi sensor and sensor coated with poly(vinylidenfluoride) polymer (PVDF) (coated-PANi sensor) were investigated. Considering the relation between the density of pore, which was coated on the layer of the PANi sensor, and sensitivity was investigated. To fabricate the porous PVDF layer on PANi sensor, poly(vinylalcohol) (PVA), which is water-soluble polymer, was used. Coated-PANi sensor was less affected by humidity compared with pure-PANi sensor. And higher density of pore on PVDF layer led to higher sensitivity.
Keywords
polyaniline; PVDF; PVA; methanol gas; humidity;
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