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Humidity sensing and electrical properties of polyaniline/cobalt oxide composites
Author(s) -
Parvatikar Narsimha,
Jain Shilpa,
Kanamadi C. M.,
Chougule B. K.,
Bhoraskar S. V.,
Prasad M. V. N. Ambika
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23869
Subject(s) - polyaniline , materials science , ammonium persulfate , polymerization , polymer , fourier transform infrared spectroscopy , conductive polymer , composite material , chemical engineering , scanning electron microscope , polymer chemistry , cobalt oxide , cobalt , engineering , metallurgy
Polyaniline/cobalt oxide composites were synthesized by an in situ chemical polymerization method with ammonium persulfate as an oxidizing agent. This was a single‐step polymerization process for the direct synthesis of the emeraldine salt phase of the polymer. The polymers were characterized with X‐ray diffraction, scanning electron microscopy, and Fourier transform infrared spectral analysis. The formation of mixed phases of the polymer together with the conducting emeraldine salt phase was confirmed by spectroscopic techniques. High‐temperature conductivity measurements showed thermally activated behavior. A change in the resistance was observed with respect to the relative humidity when the pellets were exposed to a wide humidity range of 10–95%. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 653–658, 2007