Comprehensive review on polymer composites as electromagnetic interference shielding materials

Abstract

Modern electronic devices need effective shielding from external Electromagnetic Interference (EMI) to function correctly. The Electromagnetic (EM) waves emerging from communication systems and medical devices must be isolated to safeguard humans from exposure. The mechanics of EMI shielding as well as several characterization methods are discussed in this paper. Existing trends and practices of designing, fabrication and use of polymer matrix composites for EMI shielding applications are covered. Several approaches and new solutions for fabricating composites either by modification of filler or matrix are discussed and prominent features of EMI shielding material are also discussed. Conducting polymers such as polyaniline, polypyrrole and polythiophene make them adept for EMI shielding applications. An assessment of the different factors affecting the performance of EMI shielding materials is also presented.

Graphene Nanoplatelet/Multiwalled Carbon Nanotube/Polypyrrole Hybrid Fillers in Polyurethane Nanohybrids with 3D Conductive Networks for EMI Shielding

“…The propagating electromagnetic waves are weakened by absorption by the material, and they also undergo losses due to re-reflection and multiple reflections between the front and rear interfaces of the material. According to Schelkunoff theory, the EMI SE of a material may be expressed as SE ( dB ) = SE normalA + SE normalR + SE normalM In this equation, SE A is the absorption loss in the material, and SE R and SE M are the reflection and multiple reflection losses, respectively. , In this study, the EMI SEs of the MWCNT/PPy/PU, GNP/PPy/PU, and GNP/MWCNT/PPy/PU nanohybrids were derived from scattering parameters measured using a VNA.…”

Graphene Thermal Interface Materials – State-of-the-Art and Application Prospects

“…The use of graphene and FLG in composites is not limited to thermal management. It is also being utilized for electromagnetic interference (EMI) shielding [84], [99], [103], [108], [125], [198], [199].…”

Comparative Study of Graphene Nanoplatelets and Multiwall Carbon Nanotubes-Polypropylene Composite Materials for Electromagnetic Shielding

“…Traditional solutions consisting of the use of metals are becoming obsolete. Miniaturization and the need for fabrication of light devices and infrastructure determined the imperative development of alternative solutions like paints, sprayable solutions, and functional plastics and rubbers with EMI shielding properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ].…”

“…It has been found that carbon nanotubes (CNTs) and graphene could prove to be the most promising carbonaceous fillers in non-conductive polymers-based nanocomposites due to their better structural and functional properties. Their uniform dispersion in polymer matrix leads to significant improvements in several of their properties [ 7 , 8 , 9 ]. Management of the conductive materials network is critical for the EMI shielding performance of non-conductive polymers-based conductive nanocomposites, which have broad application prospects to address the concerns of electromagnetic pollution emitted by modern electronics.…”

“…The present paper reports on the most recent achievements regarding GNPs and MWCNTs-PP composite materials offering EMI shielding properties. Previously, we reported the successful fabrication of various paints offering effective EMI shielding [ 9 , 10 , 11 ]. This work reports on solid-state composite materials fabrication that can be potentially used as casings with EMI shielding properties for electronics and automotive applications.…”