Polymeric materials for electromagnetic shielding - A review

Abstract

With advent of modern technology, there is a rapid rise in growth of electronic devices which in-turn creates radio frequency interference (RFI) and electromagnetic interference (EMI).This demands an extensive research in EMI shielding materials as the modern electronic devices malfunctions due to EMI generated. In general, high electrical conductivity metals and their alloys have served as ideal shielding materials due to their high shielding effectiveness (SE). Their disadvantages like heavy weight, rigidity and corrodibility has increased the research on development of alternatives to serve purpose of EMI shielding. Hence, it is necessary to develop lightweight, thin, and easy-to-design EMI shielding materials for electronic device. In addition, if the selected material is biodegradable and environment friendly, it will add advantage to it. Polymeric materials and their composites have been used as EMI shielding materials due to their characteristics like light weight, good corrosive resistance, superior electrical, dielectric, thermal, mechanical and magnetic properties. Also, it can be degraded without creating any environment pollution. In this review article, shielding effectiveness of various polymeric materials and their composites have been deeply reviewed. In addition, this article covers the various nano-fillers and other materials that can be added along with polymers for EMI shielding.