A Comprehensive Study on EMI Shielding Performance of Carbon Nanomaterials-Embedded CFRP or GFRP Composites

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Growing demand for electromagnetic interference (EMI) shielding in advanced electrical and telecommunication systems.
• Need for novel composite materials with improved EMI shielding effectiveness.

Purpose of the Study:

• To evaluate the EMI shielding performance of carbon nanomaterial (CNM)-embedded carbon-fiber-reinforced polymer (CFRP) and glass-fiber-reinforced polymer (GFRP) composites.
• To investigate the synergistic effects of different CNMs on EMI shielding.

Main Methods:

• Fabrication of nine composite combinations using various CNMs and fiber reinforcements (CFRP/GFRP).
• Systematic evaluation of EMI shielding performance across different composite formulations.
• Comparison of plate-type CNMs (graphene, graphite nanoplatelets) versus fiber-type CNMs (carbon nanofibers).

Main Results:

• Plate-type CNMs demonstrated more significant improvements in EMI shielding compared to fiber-type CNMs.
• CFRP-based composites exhibited superior EMI shielding properties over GFRP-based composites.
• A composite with 3% carbon nanotube-graphene nanoplatelet (CNT-GNP) in CFRP achieved the highest shielding of 38.6 dB at 0.7 GHz.

Conclusions:

• CNM-embedded CFRP and GFRP composites are promising for EMI shielding applications.
• The type of CNM and the base polymer matrix significantly influence shielding effectiveness.
• Optimized CNM-polymer composites can meet the stringent EMI shielding requirements of modern electronic devices.