Abstract
In this work, various tunable sized spinel ferrite MnFe2O4 nanoparticles (namely MF20, MF40, MF60 and MF80) with reduced graphene oxide (RGO) were embedded in a polypropylene (PP) matrix. The particle size and structural feature of magnetic filler MnFe2O4 nanoparticles were controlled by sonochemical synthesis time 20 min, 40 min, 60 min and 80 min. As a result, the electromagnetic interference shielding characteristics of developed nanocomposites MF20-RGO-PP, MF40-RGO-PP, MF60-RGO-PP and MF80-RGO-PP were also controlled by tuning of magnetic/dielectric loss. The maximum value of total shielding effectiveness (SET) was 71.3 dB for the MF80-RGO-PP nanocomposite sample with a thickness of 0.5 mm in the frequency range (8.2–12.4 GHz). This lightweight, flexible and thin nanocomposite sheet based on the appropriate size of MnFe2O4 nanoparticles with reduced graphene oxide demonstrates a high-performance advanced nanocomposite for cutting-edge electromagnetic interference shielding application.
Highlights
Extensive practice of electronic and communication devices, liberating electromagnetic (EM) waves, generates EM radiation pollution [1]
The particle size and structural feature of magnetic filler MnFe2O4 nanoparticles were controlled by sonochemical synthesis time 20 min, 40 min, 60 min and 80 min
The electromagnetic interference shielding characteristics of developed nanocomposites MF20-reduced graphene oxide (RGO)-PP, MF40-RGO-PP, MF60-RGO-PP and MF80-RGO-PP were controlled by tuning of magnetic/dielectric loss
Summary
Extensive practice of electronic and communication devices, liberating electromagnetic (EM) waves, generates EM radiation pollution [1]. Electromagnetic interference (EMI) does affect the working and life of electronic devices and is harmful to human health [2]. This noble type of EM radiation pollution delivers a solid motivation to develop efficient EMI shielding materials [3]. Lightweight, thinness and cost efficiency are other additional necessities of high-performance EMI shielding materials for operational applications [4]. Polymer-based EMI shielding composite materials are lightweight, resistant to corrosion, flexible and simple in preparation [5]. The performance of polymer-based EMI shielding materials depends on the intrinsic electrical conductivity, aspect ratio, and concentration of the fillers [6]. Spinel ferrite nanoparticles as nanofillers have been established as potential magnetic absorbers due to their outstanding magnetic loss, good stability and cost-effectiveness [8,9]
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