Recent advances in electromagnetic interference shielding properties of carbon-fibre-reinforced polymer composites—a topical review

Abstract

Using carbon-fibre-reinforced polymer (CFRP) composites for electromagnetic interference (EMI) shielding has become a rapidly emerging field. This state-of-the-art review summarises all the recent research advancements in the field of electromagnetic shielding properties of CFRP composites, with exclusive attention paid to experimental work. It focuses on (1) important mechanisms and physical phenomena in the shielding process for anisotropic carbon-fibre composites and (2) shielding performance of CFRP materials as reported in the literature, with important performance-affecting parameters. The key properties which directly influence the shielding performance are identified, the most critical being the carbon-fibre concentration along with length for discontinuous carbon-fibre-filled polymers and the lay-up for continuous carbon-fibre-reinforced composites. The effect of adding conductive inclusions such as metal or carbon nanotubes is also reviewed. It is emphasised that processing conditions are strongly linked with the shielding properties of a composite. This is a first review, which covers all the recent advancements in the field of shielding properties of carbon-fibre-reinforced composites, with detailed analysis of factors influencing these properties and clear distinction between continuous and discontinuous reinforcement. It is shown that CFRP composites make a good candidate as an EMI shielding enclosure material.

Spherical boron nitride/pitch‐based carbon fiber/silicone rubber composites for high thermal conductivity and excellent electromagnetic interference shielding performance

“…When SE T > 10 dB or the thickness of shielding materials is larger than that of the skin depth, SE M can be neglected and thus SE T is reduced to the Equation () 38–41 : …”

Excellent electromagnetic interference shielding performance of polypropylene/carbon fiber/multiwalled carbon nanotube nanocomposites

“…This pollution affects the performance of these devices and also has a very negative impact on human health 5,6 . Therefore, there is a need for a suitable material that can act as a shield to counter electromagnetic waves 7 . Electromagnetic shielding requires a balanced combination between electrical conductivity, dielectric permittivity, and magnetic permittivity.…”

“…5,6 Therefore, there is a need for a suitable material that can act as a shield to counter electromagnetic waves. 7 Electromagnetic shielding requires a balanced combination between electrical conductivity, dielectric permittivity, and magnetic permittivity. In a material, the main mechanism for EMI attenuation are absorption, reflection, and multiple reflections.…”

“…In a material, the main mechanism for EMI attenuation are absorption, reflection, and multiple reflections. [7][8][9][10] The phenomenon of reflection depends on the mobile charge carriers such as electrons which are present in the material along with them. Therefore, the shielding material is likely to be electrically conductive.…”

Fabrication of Conductive, High Strength and Electromagnetic Interference (EMI) Shielded Green Composites Based on Waste Materials

“…The electrical conductivity and EMI shielding ability of such composites mostly depend on the type (metal-based or carbon-based) and physical parameters (size, concentration, structure, processing, and dispersion) of the conductive fillers used. The extent of SE improvement with the gradient increases, creating longer fibers [ 7 , 8 ].…”