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Functionalized-CNT Polymer Composite for Microwave and Electromagnetic Shielding.

Muhammed Kallumottakkal1, Mousa I Hussein1, Yousef Haik2

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Summary
This summary is machine-generated.

This study explores microwave properties of metallic oxide-decorated multi-wall carbon nanotubes (MWCNTs) in a polyurethane matrix. Results show varying microwave absorption based on metallic oxide concentration, offering insights for material design.

Keywords:
dielectricfunctionalized CNTmicrowave absorptionreflection loss

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electromagnetics

Background:

  • Multi-wall carbon nanotubes (MWCNTs) are investigated for advanced material applications.
  • Functionalization of MWCNTs with metallic oxides can alter their electromagnetic properties.
  • Polyurethane (PU) serves as a matrix for composite material development.

Purpose of the Study:

  • To investigate the microwave properties of MWCNT-PU composites functionalized with metallic oxides.
  • To analyze the effect of different metallic oxide concentrations on microwave absorption.
  • To characterize the microstructure of the developed composites.

Main Methods:

  • Surface functionalization of MWCNTs with cobalt, iron, and cobalt ferrite at varying concentrations (5%, 10%, 20%).
  • Impregnation of decorated MWCNTs into a polyurethane matrix.
  • Characterization using electron microscopy.
  • Dielectric property analysis via open-ended coaxial probe technique (5-50 GHz).

Main Results:

  • Metallic oxide-decorated MWCNT-PU composites exhibited distinct microwave-frequency absorption characteristics.
  • Absorption varied significantly with the concentration of incorporated metallic oxides.
  • Electron microscopy confirmed successful surface decoration and composite formation.

Conclusions:

  • The concentration of metallic oxides on MWCNT surfaces critically influences microwave absorption in PU composites.
  • These findings are valuable for designing materials with tailored microwave absorption capabilities.
  • Further research can optimize compositions for specific electromagnetic applications.