Dielectrical properties of PANI/TiO{sub 2} nanocomposites
Conducting polyaniline/titanium dioxide (PANI/TiO{sub 2}) composites have been succesfully synthesized by insitu polymerization technique. The PANI/TiO{sub 2} nanocomposites of different compositions were prepared by varying weight percentage of TiO{sub 2} nanoparticles such as 10 wt%, 20 wt%, 30 wt%, 40 wt% and 50 wt% into the fixed amount of the aniline monomer. The prepared powder samples were characterized by X-ray diffractometer (XRD) and Scanning electron microscope (SEM). The intensity of diffraction peaks for PANI/TiO{sub 2} composites is lower than that for TiO{sub 2}. SEM pictures show that the nanocomposite were prepared in the form of long PANi chains decorated with TiO{sub 2} nanoparticles. The dielectric properties and AC conductivity were studied in the frequency range1K Hz–10M Hz. At higher frequencies, the composites exhibit almost zero dielectric loss and maximum value of σ{sub ac} is found for a concentration of 20 wt% TiO{sub 2} in polyaniline. The interface between polyaniline and TiO{sub 2} plays an important role in yielding a large dielectric constant in nanocomposites.
- OSTI ID:
- 22606304
- Journal Information:
- AIP Conference Proceedings, Vol. 1731, Issue 1; Conference: DAE solid state physics symposium 2015, Uttar Pradesh (India), 21-25 Dec 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CONCENTRATION RATIO
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
ELECTRON SCANNING
INTERFACES
LOSSES
MONOMERS
NANOCOMPOSITES
NANOPARTICLES
PERMITTIVITY
POLYMERIZATION
POWDERS
SCANNING ELECTRON MICROSCOPY
TITANIUM
TITANIUM OXIDES
X-RAY DIFFRACTION
X-RAY DIFFRACTOMETERS