Recent Development in Fabrication of Co Nanostructures and Their Carbon Nanocomposites for Electromagnetic Wave Absorption

Abstract

In recent years, Electromagnetic wave (EMW) absorption materials have received great interests owing to their ability of addressing the increased EM radiation (EMR) and interference (EMI) problems. With the advantages of high magnification saturation and large permeability in GHz range, cobalt materials have been considered as promising EM absorbers. This article introduces the development of pure Co materials with different micro-structures and Co/C composites as EM wave absorption materials. The effects of various microstructures, filling ratios, and graphitization degree on the EM wave absorption properties were thoroughly discussed. Through comparisons of different types of Co based absorbers, the combination of Co and porous carbon can be an effective method and main direction to reach the requirements of ideal EMW absorption materials with strong absorption, low thickness, broad absorption bandwidth and low density.

Interface Engineered Microcellular Magnetic Conductive Polyurethane Nanocomposite Foams for Electromagnetic Interference Shielding

“…With extensive deployment and development of electronic equipment and communication devices, serious electromagnetic interference (EMI) interrupts the functions of equipment and affects the human organs [1][2][3][4][5][6]. Recently, more efforts have been made to seek for novel lightweight and high-performance EMI shielding materials [7][8][9][10][11][12].…”

Review on Shielding Mechanism and Structural Design of Electromagnetic Interference Shielding Composites

“…[17] Metal-and carbon-based electromagnetic interference shielding materials have good shielding effect and a wide working frequency range. [18][19][20] However, their mechanical properties are insufficient; their service life is short; [21] and their own density is high, making this equipment bulky. Additionally, they lack mechanical properties, which are easily damaged, and, therefore, cannot meet the requirements of lightweight, intelligence, softness, and small volume.…”

Electromagnetic interference shielding enhancement of poly(lactic acid)-based carbonaceous nanocomposites by poly(ethylene oxide)-assisted segregated structure: a comparative study of carbon nanotubes and graphene nanoplatelets

“…The wide use of electronic communications and devices has led to increasing electromagnetic pollution. Compared to traditional metals, conductive polymer composites (CPCs) have received more and more attention recently as the electromagnetic interference (EMI) shielding materials, due to their light weight, resistance to corrosion, low cost, and good processing performance [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. However, high amounts of conductive fillers are usually needed to achieve high-performance EMI shielding (at least above 20 dB).…”