Optimization of mechanical and electromagnetic interference shielding properties of expanded graphite/polyurethane composite foams

Author:

Oraby Hussein1ORCID,Darwish Mohammad2,Senna Magdy H.3ORCID,Tantawy Hesham Ramzy1

Affiliation:

1. Department of Chemical Engineering Military Technical College Cairo Egypt

2. Department of Radar Military Technical College Cairo Egypt

3. Radiation Chemistry Department National Center for Radiation Research and Technology, Atomic Energy Authority Cairo Egypt

Abstract

AbstractThe expanded graphite (EG) was used as a filler in EG/polyurethane (PU) composite foams for electromagnetic interference shielding (EMI). The EG/PU composite foams were characterized by Fourier transform infrared spectroscopy (FTIR) and SEM. The shielding effectiveness (SE) of the EG/PU composite form containing 5 wt% EG was −24 dB at 5 wt% in the 8–12 GHz range. The optimal EG loading was 3 wt% and the corresponding EG/PU composite foam had a total SE of −18.9 dB and fairly good mechanical characteristics (compressive strength: 13.43 MPa and compressive modulus: 4.95 MPa). These attributes position the EG/PU composite foam as a promising candidate for diverse EMI SE applications.Highlights Synthesis by thermal exfoliation and characterization by x‐ray diffraction, Raman and SEM of EG. Preparation of EG/PU foams for enhanced EMI SE. Optimization of the EG loading with regard to SE and mechanical properties of the EG/PU foams.

Publisher

Wiley

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