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Engineering multifunctionality graphene-based nanocomposites with epoxy-silane functionalized cardanol for

M Sathish Kumar1, Andrews Joseph2, K C James Raju2

  • 1Crystal Growth Centre, Anna University, Chennai 600025, India.

Journal of Colloid and Interface Science
|August 30, 2024
PubMed
Summary

This study developed lightweight graphene-based nanocomposites for microwave absorption. The materials show excellent performance, with a minimum reflection loss of -18 dB, making them effective for electromagnetic wave interference reduction.

Keywords:
Electrical propertiesInternal friction / DampingMagnetic propertiesNanostructuresParticle-reinforcementPolymer-matrix composites (PMCs)

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electromagnetics

Background:

  • Growing demand for effective microwave-absorbing materials (MAM) due to technological advancements.
  • Two-dimensional (2D) materials are favored for their high surface area, conductivity, and dielectric properties.
  • Electromagnetic wave interference requires efficient mitigation strategies.

Purpose of the Study:

  • To develop lightweight, cost-effective, and efficient graphene-based nanocomposite microwave absorbers.
  • To investigate the microwave absorption properties of epoxy resin (ER) blended with cardanol silane-functionalized (SFC) and graphene nanoplatelets (GNP).
  • To enhance hydrophobicity and surface roughness for improved material performance.

Main Methods:

  • Fabrication of nanocomposites using epoxy resin (ER), silane-functionalized cardanol (SFC), and graphene nanoplatelets (GNP).
  • Characterization of surface morphology, including surface roughness measurement (130 nm).
  • Evaluation of hydrophobicity through contact angle measurements.
  • Assessment of microwave absorption performance, including reflection loss (RL) and impedance matching.

Main Results:

  • The ER/SFC/GNP nanocomposite exhibited enhanced hydrophobicity and high surface roughness.
  • A minimum reflection loss (RL) of -18 dB was achieved at 10 mm thickness for the sample with 3 wt% GNP.
  • Improved impedance matching and dielectric loss capability were observed.
  • The damping factor ratio increased to approximately 0.95, enhancing reflection loss performance.

Conclusions:

  • The developed lightweight graphene-based nanocomposites are highly effective microwave absorbers.
  • The combination of ER, SFC, and GNP offers a promising solution for electromagnetic wave interference mitigation.
  • The material demonstrates potential for cost-effective and efficient applications in electromagnetic shielding.