Role of carbonaceous fillers in electromagnetic interference shielding behavior of polymeric composites: A review

Abstract

In this review, the EMI shielding properties of the various carbonaceous fillers are thoroughly reviewed. Electromagnetic interference (EMI) had been a cause of major concern in the live broadcasting, entertainment, aviation and defense industries since vital radio signals could create more interference, which could lead to poor performance. To reduce the effect of EMI, the organic polymeric composites along with the carbonaceous fillers are mostly used since they are flexible, low denser, high mechanical strength, high thermo-stability, high electrical and thermal conductivity, excellent fracture toughness, and high friction/wear resistance. There are lot of carbon based materials are being used as EMI shielding material in mono and compound form. This review gives a broad understanding of the utilization of carbonaceous fillers in polymer matrixes. Thus, the overall coverage on this carbon based materials and their effectiveness could help the researchers to find right carbon material for suitable application. According to this review, the absorption mechanism is vital to achieve high EMI shielding effect. The fillers such as graphene and CNTs are most preferable EMI shielding filler, according to the vast coverage of previous articles. However, there are more magnetoelectric materials also evolved recently, having combined properties of both conductive and magnetic, yielding high SE at elevated frequencies.

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

“…The most common method for improving EMI shielding is through the addition of lossy materials, such as carbon-based fillers [carbon nanotube (CNT), carbon black, graphene, and so forth], conductive polymers, ferrites, carbon iron powders, among others, whose microwave absorbing properties can be tuned by appropriate choice of the polymer matrix and also the proportion of the conducting filler. [4][5][6][7][8] However, these single-layer materials require increased thickness and in the case of ferrites and carbon iron powders as fillers, a large amount of filler is necessary thus increasing density and cost of the final product. [9][10][11][12] In order to minimize these drawbacks and decrease the density of the final product, several researchers have been dedicated to the development of hollow/porous structures.…”

The Routes to Magnetic Graphene, from Decorations with Nanoparticles to the Broken Symmetry of its Honeycomb Lattice Bonds

“…Moreover, the magnetic losses produced by nanoparticles act in a synergistic manner with the dielectric losses which are causing dissipation too (Qin et al, 2022). Particularly relevant are considered carbon porous materials, biochar, carbon nanotubes, filaments, fibers, and graphene for electromagnetic wave absorbers (Devi et al, 2022).…”

Electrical and electromagnetic shielding properties of thermally-stable polybenzoxazine/expanded graphite nanocomposites

“…The inclusion of conductive carbon-based fillers, like graphene, graphene oxide, carbon nanotubes, carbon black, and carbon nanofiber into polymer matrices resulted in hybrid nanocomposites demonstrating high electrical conductivity, good weathering resistance, and low density, which make them the ideal choice to replace metals in EMI shielding applications. 2–6…”