Investigation on Structural and Dielectric Properties of Silica Nanoparticles Incorporated Poly(Ethylene Oxide)/Poly(Vinyl Pyrrolidone) Blend Matrix Based Nanocomposites

摘要: Inorganic and organic materials based polymer nanocomposite (PNC) films, comprising silica (SiO2) nanoparticles as inorganic filler the blend of poly(ethylene oxide) (PEO) poly(vinyl pyrrolidone) (PVP) matrix (i.e., (PEO–PVP)-x wt% SiO2; x = 0, 1, 3 5) have been prepared by solution-casting method. These PNC films are characterized employing scanning electron microscopy (SEM), X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectroscopy, dielectric relaxation spectroscopy (DRS). The effect SiO2 nanofiller on spherulite porous morphology, miscibility polymers, PEO crystallite size, degree crystallinity, polymer–polymer polymer-nanoparticle interactions, from 20 Hz to 1 MHz range electrical dispersion behaviour also structural dynamics these investigated. structures miscible phases, length greatly alter with incorporation merely 1 wt% in which further changes increase concentration up 5 wt%. real part complex permittivity over radio frequency (20 kHz–1 MHz) for is found about 2 their loss tangent values below 0.03, at room temperature, significantly low. contribution interfacial polarization lower audio frequencies enhances linearly 4 decrease 1 kHz confirming tunable behaviour. study 3 wt% containing film temperature 30–60 °C reveals its thermally activated characteristics, dependent time dc conductivity obey Arrhenius activation energies 0.2–0.3 eV. parameters ascertain promising applications development novel electroactive functional materials, use substrate insulating polymeric nanodielectrics fabrication flexible-type naturally degradable organoelectronic devices.