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Synthesis of nano‐sized ZnO and polyaniline‐zinc oxide composite: Characterization, stability in terms of DC electrical conductivity retention and application in ammonia vapor detection
Author(s) -
Khan Asif Ali,
Khalid Mohd.
Publication year - 2010
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.32037
Subject(s) - polyaniline , materials science , nanocomposite , fourier transform infrared spectroscopy , scanning electron microscope , thermogravimetric analysis , conductivity , polymerization , chemical engineering , zinc , conductive polymer , aniline , composite material , polymer , chemistry , organic chemistry , engineering , metallurgy
Nano‐sized particles of Zinc oxide (ZnO) were synthesized using a new chemical rout. The chemical oxidative polymerization of aniline in the presence of nano ZnO was employed to synthesize a polyaniline‐zinc oxide (PANI‐ZnO) nanocomposite. The material was characterized by using transmission electron microscopy, XRD, scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), and Thermogravimetric analysis (TGA). The conductivity measurements showed the resulting composites possessed higher conductivity as compared to pure polyaniline (PANI). The nanocomposite exhibited fairly sensitive towards solution of aqueous ammonia (NH 3 ), when it was exposed to various concentrations of NH 3 in an ambient room temperature. The results show that the sensor has good sensitivity and good repeatability upon repeated exposure to NH 3 . PANI‐ZnO nanocomposite was also used to study electrical conductivity under isothermal conditions in the temperature range 50–130°C. The composite was found stable under ambient conditions below 90°C in terms of DC electrical conductivity retention. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010