Abstract
Author(s): K. Vanitha* and K. A Vijayalakshmi
Polyaniline/Fly ash/Silver (IPANI+NLS+Ag) composite films were prepared in different concentrations of BaFe and surface modified by DC glow discharge plasma. The prepared composite films were characterised by Fourier Transform Infrared Spectroscopy (FTIR) X-Ray Diffraction (XRD) Scanningelectron Microscopy (SEM) UV and DC conductivity analysis. From FTIR analysis some new bonds like C=O and C-H were observed in the plasma treated samples. An XRD analysis report shows that the Ag nanoparticles were in good agreement with IPANI and the intensity of the composite has increased after plasma treatment. The calculated average grain size of untreated Ag is 38 nm and plasma treated is 35 nm and also the specific surface area of both samples is 24 m2g-1. SEM analysis showed the Ag particles were well distributed on IPANI and also had a small amount of surface roughness after plasma treatment. The UV-Vis absorption spectroscopy indicates the characteristics of absorption spectra of IPANI. The DC conductivity of pure PANI/NLS+Ag nanocomposites clearly indicated that the Ag nanoparticles increased the electrical conductivity of PANI nanocomposites as compared to pure aniline. The AC conductivity and dielectric properties of PANI/NLS/Ag composite which demonstrates the variation of AC conductivity dielectric constant and dielectric loss with frequency of untreated and plasma treated PANI/NLS/Ag composites. The AC conductivity (1.0 KHz) of the composite is recorded in the range of untreated 0.12-2.3 × 10-7 Scm-1 of and plasma treated 0.12-3.45 × 10-7 Scm-1. The conductivity difference between the untreated and plasma treated composites maybe the polar functional group activation due to plasma treatment..
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