Effect of dielectric and magnetic nanofillers on electromagnetic interference shielding effectiveness of carbon/epoxy composites

Abstract

Tremendous development in electronic devices and their indiscriminate use has created a severe problem of electromagnetic pollution. Different types of electromagnetic interference (EMI) shielding materials and structures are used to protect electronic devices from the harmful effect of electromagnetic pollution. A present study was conducted to compare the effect of dielectric and magnetic nanofillers on electromagnetic shielding effectiveness (EMI SE) of carbon fiber reinforced composite structures (CFRC). Composites structures were developed using different dielectric and magnetic nanofillers. Effect of nanofillers on microwave absorption properties and reduction in electromagnetic pollution was investigated. Relationship between electrical conductivity and EMI shielding effectiveness in L, S, C, and X-frequency range was also studied. Among the dielectric nanofillers, silicon carbide showed excellent EMI SE in X-frequency range, while among magnetic nanofillers, zinc oxide showed excellent EMI shielding characteristics in a broad frequency range of 100 MHz to 13.6 GHz. Among magnetic nanofillers, CFRC with zinc oxide nanofillers showed the lowest skin depth value of 3.32 × 10−4 mm and among dielectric nanofiller, CFRC with silicon carbide nanofillers gave the lowest skin depth value of 6.49 × 10−4 mm, implying their excellent potential in EMI shielding applications.

Application of Cement-Based Carbon Fiber Material in Construction of Building Durability

“…Ahmad, H. S.et al tested the electromagnetic shielding effect of carbon fiber cement-based composites, adding carbon and carbon fiber to the cement-based composites, respectively, the results show that as the mass fraction of carbon black increases over 6%, the electromagnetic shielding effect of cement-based composites has been greatly improved [ 12 ]. Carbon fiber is a more effective additive than carbon, with the increase of carbon fiber content, the shielding effectiveness gradually increases, and the maximum electromagnetic shielding effect reaches 27 dB in the tested frequency range [ 13 ].…”

Optimization of CoFe2O4 nanoparticles and graphite fillers to endow thermoplastic polyurethane nanocomposites with superior electromagnetic interference shielding performance

“…The material will not be suitable for EMI shielding if the thickness of the shielding material is less than the skin depth of the material owing to the reflection of the incoming EM waves from the shielding material surface rather than absorption. 87 Fig. 11(b) illustrates the variation of δ as a function of frequency for all the developed nanocomposites.…”

A review on MXene-based microwave absorption composites: engineering, component optimization and structure regulation

“…Under the influence of an AC magnetic field, eddy currents generated by magnetic induction within the magnetic conductor cause the magnet to heat up. 59,60 In the microwave band, eddy current loss is regarded as the primary source of magnetic loss, wherein the work performed by an external electric field on a magnetic material transforms into heat energy during magnetization or demagnetization. Eddy current loss ( C 0 ) arises from the energy dissipation due to induced currents in a magnetic conductor moving within a changing magnetic field, and it can be calculated using the following equation.…”