Electromagnetic Shielding Effectiveness and Conductivity of PTFE/Ag/MWCNT Conductive Fabrics Using the Screen Printing Method

Abstract

The management of the electromagnetic interference (EMI) of thin, light, and inexpensive materials is important for consumer electronics and human health. This paper describes the development of conductive films that contain a silver (Ag) flake powder and multiwall carbon nanotube (MWCNT) hybrid grid on a polytetrafluoroethylene (PTFE) film for applications that require electromagnetic shielding (EMS) and a conductive film. The Ag and MWCNT hybrid grid was constructed with a wire diameter and spacing of 0.5 mm. The results indicated that the proposed conductive films with 0.4 wt% MWCNTs had higher electromagnetic shielding effectiveness (EMSE) and electrical conductivity than those with other MWCNT loading amounts. The results also showed that the film with 0.4 wt% MWCNT loading had a high 62.4 dB EMSE in the 1800 MHz frequency and 1.81 × 104 S/cm electrical conductivity. This combination improved stretchability, with 10% elongation at a 29% resistivity change rate. Conductive films with Ag/MWCNT electronic printing or lamination technologies could be used for EMI shielding and electrically conductive applications.

Fabrication and characterization of Fe2O3‐OPEFB‐PTFE nanocomposites for microwave shielding applications

“…Polytetrafluoroethylene (PTFE) has also been widely used as a matrix to host various reinforcements such as carbon nanofiber [ 28 ] silver (Ag) flake powder and multiwall carbon nanotube (MWCNT) [ 29 ] for microwave shielding applications. However, it has never been used to embed Fe 2 O 3 NPs and oil palm empty fruit bunch (OPEFB) fiber.…”

Design of Electromagnetic Shielding Textiles Based on Industrial‐Grade Multiwalled Carbon Nanotubes and Graphene Nanoplatelets by Dip‐Pad‐Dry Process

“…For instance, 5G wireless technologies are now emerging throughout the world that will require electromagnetic waves of higher frequencies (up to 30 GHz) and more base stations (expected to be 60 times higher than the current number of 4G base stations) that will be placed closer to each other. [ 1 ] In addition, other technologies such as GPS, radar, and mobile phones are available that use radiofrequency electromagnetic radiation, thus actively contributing to all this undesired electromagnetic exposure. This excessive radiation may lead to malfunctions in the human health or affect the operation of surrounding electronic equipment.…”

Manufacturing of Pure Iron by Cold Rolling and Investigation for Application in Magnetic Flux Shielding

“…In the case of high-frequency applications (frequency > 60 Hz), a conducting layer of aluminum or copper is used along with the permeable material for magnetic field shielding [ 25 ]. Zeng et al proposed ferrite coils and an aluminum layer for magnetic shielding to increase the power transmission efficiency of an electro-magnetic system [ 26 ].…”