Fabrication of Graphene/Natural Fiber Dielectric Composite for Electromagnetic Interference Eradication

The emerging trends in advanced communication inherent with 5G technology leading to challenging issues in the development of functional material in the present scenario. As the natural fibrous material is indigenously available creates the enthusiastic development of carbon-based composites. With their excellent structural and electrical properties, natural fibers have attracted significant attention. In this study, natural carbonaceous fiber was dispersed in an epoxy matrix with the addition of graphene fibers to enhance its properties. The graphene-doped banana coconut fiber composite (GN-BNN-CCNT/Epoxy) was fabricated using a hand layout molding technique. The fabricated composites were characterized using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and dielectric testing. The results showed that the addition of graphene and biodegradable fibers significantly improved the microwave assets and reflection loss of the composites. The highest impedance matching is at 0.5845 @ 10.53 GHz, and a reflection loss of −15.6 dB was achieved at equal wt% of carbon fiber loading. The results show that the improved performance of composite can be attributed to the high electrical conductivity and unique electromagnetic properties of graphene and natural fiber. This study provides a promising approach for developing lightweight and high-performance EMI shielding materials for various industrial applications such as in stealth and electronics sectors.