Effective electromagnetic interference shielding using polyurethane / graphite composite foam materials

Document Type : Original Article


1 Department of Chemical Engineering, Military Technical College, Cairo, Egypt.

2 Department of Radar, Military Technical College, Cairo, Egypt.

3 El-Nasr Company for Intermediate Chemicals, Industrial Area, Giza, Egypt.

4 Radiation Chemistry Department, National Center for Radiation Research and Technology, P.O.Box 29, Nasr City, Cairo, Egypt.



Conversely, to metallic based electromagnetic interference (EMI) shielding materials; composite polymer-based foams are normally lightweight, cheaper than metals, and less sensitive to types of environmental degradation. In this work polyurethane - Graphite composite (PU-G) foam materials were prepared with different filler concentrations. Different characterization tools such as Fourier Transform Infra-Red (FTIR) and scanning electron microscope (SEM), were used to identify the structural and topological construction of the prepared composites. Further mechanical properties for the prepared samples were studied to elucidate the opportunity of utilizing these composites in applied applications, specifically for electromagnetic interference (EMI) shielding efficiency (SE) for aerospace applications. Also, in order to adjust this research in the area of aerospace EMI SE, the evaluations were executed in the X-band at (8-12) GHz. The obtained data indicated that the moreover in filler concentration enhanced the compressive strength and compressive modulus of the prepared samples. Moreover EMI SE reached -44 dB with 30 wt % graphite concentration. Finally
polyurethane – graphite composite foam material can be taken into consideration a gratifyingmaterial to be utilised in EMI SE.


Volume 19, Issue 19
The 19th International Conference on Aerospace Sciences & Aviation Technology (ASAT-19 2021) 6th-8th April 2021
April 2021
Pages 1-11