Abstract
The importance of nanoparticles in controlling physical properties of polymeric nanocomposite materials leads us to study effects of these nanoparticles on electric and dielectric properties of polymers in industry In this research, the dielectric behaviour of High-Density Polyethylene (HDPE) nanocomposites materials that filled with nanoparticles of clay or fumed silica has been investigated at various frequencies (10 Hz-1 kHz) and temperatures (20-60°C). Dielectric spectroscopy has been used to characterize ionic conduction, then, the effects of nanoparticles concentration on the dielectric losses and capacitive charge of the new nanocomposites can be stated. Capacitive charge and loss tangent in high density polyethylene nanocomposites are measured by dielectric spectroscopy. Different dielectric behaviour has been observed depending on type and concentration of nanoparticles under variant thermal conditions.
Highlights
Among the various types of polymeric dielectrics, HighDensity PolyEthylene (HDPE) has been standing out as a raw material for the production of insulators, spacers, and as a coating for cable conductors used in electrical power distribution networks
This technique is based on the measurement of the capacitance as a function of fre- Fig. 4: Measured loss tangent for SiO2/HDPE nanocomposites quency of a sample sandwiched between two electrodes
The loss tangent of SiO2/HDPE nanocomposites decreases with increasing fumed silica concentration nanoparticles up to 1 wt%, especially at high frequencies but it increases with increasing fumed silica concentration nanoparticles (1–10 wt%)
Summary
Among the various types of polymeric dielectrics, HighDensity PolyEthylene (HDPE) has been standing out as a raw material for the production of insulators, spacers, and as a coating for cable conductors used in electrical power distribution networks. For this type of application, the dielectric strength is one of the properties that must be taken into account in order to check. All the experimental results of dielectric spectroscopy have been investigated and discussed to detect all nanoparticles effects on electrical properties of nanocomposite industrial material which fabricated; like High Density PolyEthylene (HDPE) with various nanoparticles of clay and fumed SiO2.
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