Publication detail

Electrical properties of epoxy/graphite flakes microcomposite at the percolation threshold concentration

ALSOUD, A. DARADKEH, S. SHAHEEN, A. AL-HROUB, Q. KNÁPEK, A. MOUSA, M. SOBOLA, D.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

The electrical properties and activation energy of epoxy/graphite flakes (GFs) micro-composite with different content of GFs (0.0625-1 wt%) were studied for electrical properties using Novocontrol Alpha Analyser (10-2 Hz-107 Hz). GFs sizes ranged from (100 nm to 10 mu m). The analysis was performed by scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), visible spectrum reflectance spectra (VIS) spectra, and Fourier Transform Infrared spectra (FTIR) spectroscopy. Increasing GFs content caused multiple changes in electrical characteristics. At 0.0625 wt%, all electrical properties noticeably increased. But at 0.125 to 0.25 wt%, immobilized nanolayers were formed leading to decreased permittivity, dielectric loss (tan(delta)), quality factor (Q-factor), capacitance, conductivity, and figure of merit (F-factor). At 0.25 wt%, the epoxy microcomposite had lower permittivity, tan(delta), conductivity, and capacitance compared with unfilled epoxy. With 0.5 wt% of GFs, signified the percolation threshold, initiating a rise in permittivity, conductivity, capacitance, and tan(delta), accompanied by the closer proximity of grain boundaries, facilitating the formation of conductive channels. At a concentration of 1 wt% of GFs, the establishment of continuous interfacial conductive pathways resulted in a remarkable augmentation of all dielectric properties. The Cole-Cole analysis has been employed to investigate variations in epoxy/GFs microcomposites based on concentration levels.

Keywords

graphite flakes; epoxy resin; epoxy nanocomosite; epoxy microcomosite; dielectric properties

Authors

ALSOUD, A.; DARADKEH, S.; SHAHEEN, A.; AL-HROUB, Q.; KNÁPEK, A.; MOUSA, M.; SOBOLA, D.

Released

17. 4. 2024

Publisher

IOP Publishing Ltd

Location

BRISTOL

ISBN

1402-4896

Periodical

PHYSICA SCRIPTA

Year of study

Number

State

Kingdom of Sweden

Pages from

Pages to

Pages count

URL

https://iopscience.iop.org/article/10.1088/1402-4896/ad3b50/pdf

Full text in the Digital Library

http://hdl.handle.net/11012/245532

BibTex

@article{BUT188482,
  author="Ammar Awadallah Ahmad {Alsoud} and Samer Issa Abdel Razzaq {Daradkeh} and Adel A {Shaheen} and Qasim Amjad {Al-Hroub} and Alexandr {Knápek} and Marwan {Mousa} and Dinara {Sobola}",
  title="Electrical properties of epoxy/graphite flakes microcomposite at the percolation threshold concentration",
  journal="PHYSICA SCRIPTA",
  year="2024",
  volume="99",
  number="5",
  pages="1--15",
  doi="10.1088/1402-4896/ad3b50",
  issn="1402-4896",
  url="https://iopscience.iop.org/article/10.1088/1402-4896/ad3b50/pdf"
}