Dielectric properties of PANI-PEG nanocomposites filled with silica media for antistatic applications |
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| Authors: | Eman H. Ahmed Magdy M. H. Ayoub Azza A. Ward |
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| Affiliation: | 1. Polymers and Pigments Department, Chemical industries institute, National Research Centre (NRC), Advanced Materials and Nanotechnology group, Cairo, Egypt;2. Microwave Physics and Dielectrics Department, National Research Centre, Cairo, Egypt |
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| Abstract: | The dielectric investigations of porous synthetic silica gel modified with polyaniline (PANI) and polyethylene glycol (PEG) polyblend at various concentrations are demonstrated in this paper. By using the chemical oxidative process to embed polyaniline (PANI) and polyethylene glycol (PEG) into a silica matrix, conducting gel nanocomposites were synthesized. For various dopant concentrations, the dielectric permittivity (ε′), D.C. conductivity (σdc), loss tangent (tanδ) and dielectric loss (ε″) were investigated. The samples were characterized using differential thermal analysis/thermogravimetric analysis, Fourier transform infrared spectroscopy and high-resolution transmission electron microscopy. Depending on the co-blend content, PANI-PEG modified silica structures produce nanoparticles ranging in size from 9.9 to 48.1 nm. The variation of DC conductivity (σdc) with PANI/PEG content shows Maxwell-Wagner Sillars (MWS) effect confirming the role of the conjugation and the structural order. |
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| Keywords: | D.C. conductivity (σ) dielectric permittivity (ε′) loss tangent (tanδ) nanocomposites PANI-PEG |
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