Title:Progress on Polyolefin/Graphene Nanocomposites with High Dielectric
Constant and Low Dielectric Loss for Electrical Applications
Volume: 9
Issue: 4
Author(s): Haia Aldosari*, Nawal Madkhali, Saja Algasser and M. Khairy
Affiliation:
- Department of Physics, College of Science, Shaqra University, P.O. Box 5701, Shaqra 11961, Saudi Arabia
Keywords:
Graphene, nanocomposites, fabrications and properties, GO, rGO, dielectric, conductivity.
Abstract:
Introduction: The attached oxygen functional group in graphene oxide (GO) with layers
that are about 1.1 ± 0.2 nm thick, has hindered the performance of electrical characteristics. Diminution
of the oxygen functional group, and increasing the carbon/oxygen (C/O) ratio can enhance electrical
conductivity.
Method: This study investigated the effect of graphene derivatives (C/O) ratios on the dielectric properties
of low-density polyethylene (PE) made of metallocene, as well as polypropylene (PP)
and mixtures of them. The oxygen functional groups were reduced by utilizing graphene oxide (GO)
and reduced graphene oxide (rGO). The effect of GO and rGO-based polyolefin produced by solution
blending while lowering the oxygen functional group is explored.
Result: The surface morphology and chemical structure were examined by using a scanning electron
microscope (SEM) and Fourier Transformed Infrared Spectroscopy (FTIR). The electrical characteristics
of the composite films, such as their loss factor (tan δ) and dielectric constant, permittivity and
conductivity, and imaginary permittivity were examined. At room temperature, measurements were
performed at frequencies ranging from 300 Hz to 8 MHz. ε'; the dielectric permittivity and imaginary
permittivity (ε") of polymer/ reduced graphene oxidehowever, these values rapidly decreased with increasing
frequency.
Conclusion: The alternating current conductivity of the composites was likewise shown to increase
with increasing frequency.
