Functionalized Graphene/Nickel/Polyaniline Ternary Nanocomposites: Fabrication and Application as Electromagnetic Wave Absorbers

Abstract

The evolution of high electromagnetic absorption materials is essential in the fast growing electronic industry in overcoming electromagnetic pollution. In view of this, a series of Ni nanoparticle-decorated functionalized graphene sheets (FG/Ni) are synthesized by a solvothermal method using different ratios of FG/Ni precursors. Subsequently, FG/Ni is subjected to in situ polymerization of aniline to form FG/Ni/PANI ternary composites and characterized. The total electromagnetic interference shielding efficiency (SET) measurements on FG/Ni/PANI with an optimized FG/Ni ratio (50 mg:600 mg NiCl2·6H2O) exhibit enhanced performance, i.e., ∼47–65 dB (2–3.8 GHz) and ∼65–45 dB (3.8–8 GHz), following absorption as the dominant mechanism due to the matching of dielectric loss and magnetic loss. It is anticipated that such excellent performance of robust FG/Ni/PANI ternary composites at a very low thickness (0.5 mm) has great potential in the application of microwave-absorbing materials.

High-Performance, Lightweight, and Flexible Thermoplastic Polyurethane Nanocomposites with Zn2+-Substituted CoFe2O4 Nanoparticles and Reduced Graphene Oxide as Shielding Materials against Electromagnetic Pollution

“…The total shielding effectiveness (SE T ) of the material against EMI can be defined by its ability to attenuate electromagnetic waves and is expressed in decibel (dB) units . The high value of EMI SE (dB) of a shielding material signifies less transmission of EM waves through the shielding material.…”

Manufacturing Strategies for Graphene Derivative Nanocomposites—Current Status and Fruitions

“…With the nanofiller loading during in situ manufacturing, D.C. conductivity was varied in the range of 1.66-186.57. Manna et al [92] also reported on in situ polyaniline/graphene nanocomposites. The fine graphene dispersion and interaction with polyaniline led to better electrical conductivity and a high electromagnetic shielding of 65 dB.…”

Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

“…Studies were conducted on several nanomaterials, such as ferromagnetic element nanoalloys, metal oxides, ferrites and their polymers and ICP-based nanocomposites in EMI shielding applications. 276–405 The choice of magnetic materials-filled ICP nanocomposites in EMI shielding applications is mainly guided by the dielectric loss, magnetic loss and impedance matching of the component(s) of the material(s) under investigation. It provides a combination of magnetic nanoparticles and ICPs that account for its additionally reduced weight, cost, enhanced flexibility and corrosion resistance, tuneability conductivity and tailorable permeability.…”

“…Manna and Srivastava 324 prepared polyaniline-based nanocomposites comprising Ni and functionalized graphene (FG) by in situ aniline polymerization and observed enhancement in the SE corresponding to ∼47–65 dB (2–3.8 GHz) and ∼65–45 dB (3.8–8 GHz) following absorption as the dominant mechanism. Such enhanced electromagnetic absorption could be ascribed to the impedance matching between dielectric loss and magnetic loss.…”