Dielectric properties of PANI with metal oxide nanocomposites

Abstract

The nanoparticles of Nickel Oxide (NiO) are synthesized using heat combustion method. The nanocomposites of Polyaniline (PANI) are prepared by doping with different weight percentages of Nickel oxide nanoparticles by in-situ polymerization method. The PANI/NiO nanocomposites are synthesized at temperature of 25 °C. The nanocomposites of PANI with NiO at 10, 20, 30, 40 and 50 weight percentages are prepared separately during the in-situ polymerization process. The samples of nanocomposite of PANI/NiO are characterized by using X-Ray diffractometer. The physical properties of dielectric permittivity of the nanocomposites, dielectric loss, AC conductivity and impedance are measured as function of frequency in the range 5Hz-35MHz at room temperature. In these studies it is found that as frequency increases the dielectric constant decreases, and it is remains constant at higher frequencies. It is also observed that as weight percentage of NiO with PANI increased, both the dielectric constant and dielectric loss are decreased at a particular value of frequency. In case of AC conductivity it is found that as frequency increases the AC conductivity remains constant up to 4.5MHz and afterwards it increases due to hopping of the charge carriers in the nanocomposite. It is also observed that as weight percentage of NiO increased the AC conductivity also increased at higher frequency. © 2018 Author(s).