In situ polymerization of graphene-polyaniline@polyimide composite films with high EMI shielding and electrical properties

Abstract

With the increasing demands of the electronics industry, electromagnetic interference (EMI) shielding has become a critical issue that severely restricts the application of devices.

Recent Advancement of Electromagnetic Interference (EMI) Shielding of Two Dimensional (2D) MXene and Graphene Aerogel Composites

“…Cheng et al prepared graphene−polyaniline (PANI)@polyimide composite with a ratio of 10:1 (GN: PANI) shows 21.3 dB (t − 0.04 mm) with 490.3 S•cm −1 of EC while GN/PANI, Ni decorated GN/PANI and Ag decorated GN/PANI (5 wt.%) show EMI SE of 24.85, 29.33, and 24.93 dB, respectively. Therefore, metal nanoparticle decoration with GN in PANI matrix improved EMI SE compared to the GN/PANI in polyimide matrix [68,75,76].…”

“…For the reduction purpose, hydrazine and 900 • C were used and this process has the impact on structure of the foam, polarization loss, and multiple reflection of the composite. Additionally, chemical reduction process greatly reduces the EC of graphene−carbon nanotube composition whereas thermal process considerably improves free electron path in the composite [46,[66][67][68]. Yang et al handled another strategy to create the composite aerogel that is epoxy copper nanowires/thermally annealed graphene aerogel (6.0−1.2 wt.%) and corresponding EMI SE is 47 dB with EC of 1.208 S•cm −1 , and 2 mm of thickness.…”

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

“…The total electromagnetic interference (EMI) shielding effectiveness (SE T ) can be ascribed by the logarithmic ratio between the incoming power (P in ) and outgoing power (P out ) of electromagnetic radiation [ 58 ]: …”

Synthesis and Characterization of Polyaniline-Based Composites for Electromagnetic Compatibility of Electronic Devices

“…Conductive polymer polyaniline (PANI) is used as an additional component with dielectric losses in a wide variety of EMC composites. A high EMR shielding efficiency, in a wide frequency range, has been experimentally proven for composites of PANI using silver nanowires [3], particles of antimony oxide [4], graphene [5][6][7], carbon nanotubes [8,9], Ti 3 SiC 2 [10], MoS 2 [11], CuO [12], bamboo fibers [13], bagasse [14], MXene, and other fillers [15]. The EMR shielding properties of composites of PANI with magnetic nanoparticles of cobalt and iron-nickel alloy [16] and ferrites [17] have also been shown.…”