EMI shielding plastics: A review

Abstract

The objective of this article is to review the use of conductive plastics in the shielding of electromagnetic interference (EMI). The theory of EM1 shielding and evaluation methods of EM1 materials are discussed. Different approaches in achieving high conductivity of plastics are reviewed. Emphasis is placed on filled plastics which are a promising way for shielding and do not require a secondary process. Literature on properties and processing of several common conducting plastics is reviewed. Design and processing requirements of such filled plastics-are also given. 01995 John Wiley & Sons, Gc.

Low Electrical Percolation Threshold of Silver and Copper Nanowires in Polystyrene Composites

“…We believe that nanocomposites containing high-aspect-ratio conductive metal nanoparticles should be considered as alternatives to carbonnanotube composites for use in electrostatic dissipation, electromagnetic interference, and other electronic applications, such as heat sinks, that utilize the good thermal conductivity of metals. [15,16] For example, a few studies have been dedicated to the preparation and characterization of epoxy filled with spherical silver nanoparticles for applications such as in embedded capacitors [17][18][19] and electromagnetic shielding. [20] Promising results have been demonstrated.…”

Radiofrequency Shielding by Polypyrrole-Coated Nano and Regular Fibrous Mats

“…3 Hence, it is also named radiofrequency interference (RFI). 4 EMI may disrupt the proper functioning of electronic devices or even destroy them. It is worth mentioning that all electronic devices act as an emitter (radiator) and receiver of electromagnetic waves.…”

Conducting nanocomposites based on polyamide 6,6 and carbon nanofibers prepared by cryogenic grinding

“…[1]. Depending on the additive concentration, the electrical conductivity of a composite material varies from that of the polymer matrix to that one of the carbon additive, due to the formation of a percolative network of the conducting additive at a critical concentration [2].…”