Abstract
In the given paper were investigated structure and electrophysical properties of PVDF+PbS/CdS nanocomposites. Distribution and the size of PbS and CdS nanoparticles in the polymer matrix has been studied by scanning electron microscopy (JEOL JSM-7600 F). The structure of the nanocomposite samples was investigated by the X-ray diffraction spectroscopy. The dependence of dielectric permittivity at frequency and temperature was investigated. It was shown that the dielectric permittivity of PVDF+PbS/CdS nanocomposite samples was increase in small nanoparticles content. Further increase in the concentration of the filler leads to decrease in the dielectric permittivity. The subsequent decrease in dielectric permittivity at higher nanoparticles content can be explained by the increase in defects in the structure of the nanocomposite.
Highlights
Nanocomposite materials are widely used in the areas of photonics, electronics, catalysis, energy storage, and biotechnology [1,2,3,4,5,6,7]
Distribution and the size of PbS and CdS nanoparticles in the polymer matrix has been studied by scanning electron microscopy (JEOL JSM-7600 F)
It was shown that the dielectric permittivity of PVDF+PbS/CdS nanocomposite samples was increase in small nanoparticles content
Summary
Nanocomposite materials are widely used in the areas of photonics, electronics, catalysis, energy storage, and biotechnology [1,2,3,4,5,6,7]. Most of the current studies on dielectric polymer composites focus on the enhancement of the dielectric permittivity. From the point of view of increasing the composite’s effective dielectric constant, the availability of inorganic fillers with dielectric constants on the order of hundreds and even thousands makes it very appealing to introduce them into polymers, which generally possess dielectric constants less than 10. Since the filler has a much greater permittivity than that of the polymer matrix, most of the increase in the effective dielectric constant comes through an increase in the average field in the polymer matrix, with very little of the energy being stored in the high permittivity phase [9]. The aim of this work is investigated structure and electrophysical properties of PVDF+PbS/CdS nanocomposites determine dielectric constant and dielectric loss, as a function of temperature and frequency
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