Study on low-frequency dielectric behavior of the carbon black/polymer nanocomposite

H. Shivashankar,Kevin Amith Mathias,S. M. Kulkarni,Pavankumar R. Sondar,M. H. Shrishail

doi:10.1007/s10854-021-07242-1

Abstract

Recently, polymer-based dielectric materials have become one of the key materials to play an essential role in clean energy production, energy transformation, and energy storage applications. The end usage is the energy storage capability because it is a trade-off between dielectric permittivity, dielectric loss, and dissipation factor. Hence, it is of prime importance to study the dielectric properties of polymer materials by adding filler material at a low-frequency range. In the present study, polydimethylsiloxane/carbon black nanocomposites are prepared using the solution cast method. The dielectric properties, such as dielectric constant, dielectric loss, and dissipation factors due to the concentration of filler particles and low-frequency effect on the nanocomposites, are examined. Also, different empirical models are used to estimate the dielectric permittivity of polymer nanocomposites. The low-frequency range of 100 Hz to 1 MHz and the effect of varying volume fractions of carbon black show a significant change in the dielectric properties. It is found that the nanocomposites have a higher dielectric permittivity than the base polymer material. It is also observed that an increase in filler concentration increases the dielectric permittivity, which is confirmed with an empirical model.

Highlights

In the present research world, electromagnetic interactions with solid and liquid dielectric materials are of potential interest
The effective dielectric constant, dielectric loss, and dissipation factor for pure PDMS and PDMS/CB nanocomposites are discussed in the present section
The present work primarily focuses on evaluating the dielectric behavior of pure PDMS and PDMS/CB nanocomposites

Summary

Introduction

In the present research world, electromagnetic interactions with solid and liquid dielectric materials are of potential interest. A huge number of devices operate through the interaction of the electromagnetic wave with dielectric materials. Characterization of the interface and interaction between fields and material is a critical task in an electromagnetic device. The electromagnetic absorbance performance of the materials provides good electromagnetic properties, such as impedance matching and dielectric loss. The dielectric loss is the permittivity parameter that plays a vital role in attenuating electromagnetic energy [4]. Energy storage and dissipation capability are the essential parameters in advanced materials [5,6,7]. The loss tangent is another critical property used to estimate the dielectric loss of the absorbing material [8]

Methods

Results

Conclusion