FeCo-Anchored Reduced Graphene Oxide Framework-Based Soft Composites Containing Carbon Nanotubes as Highly Efficient Microwave Absorbers with Excellent Heat Dissipation Ability

Arief, Injamamul and Biswas, Sourav and Bose, Suryasarathi (2017) FeCo-Anchored Reduced Graphene Oxide Framework-Based Soft Composites Containing Carbon Nanotubes as Highly Efficient Microwave Absorbers with Excellent Heat Dissipation Ability. In: ACS Applied Materials & Interfaces, 9 (22). pp. 19202-19214. ISSN 1944-8244

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Abstract

Conducting polymer composites containing ferromagnetic grafted-graphene derivatives are already appreciated for their lightweight, flexibility, and cost effectiveness in terms of microwave absorption. To further leverage the said properties of this wonder material, we propose a highly efficient replacement by blending conducting multiwall carbon nanotube (MWCNT) and FeCo anchored covalent cross-linked reduced graphene oxide (rGO) with poly(vinylidene fluoride) (PVDF). Interconnected conducting network of MWCNTs introduces higher electrical conductivity in the blend which is essential for microwave absorption. FeCo-anchored porous interconnected rGO framework was designed via solvent-mediated in situ coreduction in the presence of Fe(II) and Co(II) precursors. Resulting cross-linked-rGO/FeCo displays fascinating coexistence of ferromagnetism and conducting-dielectric behavior, while largely preserving the robust 3D porous interconnected structure. Coupled with conducting MWCNTs, diamine cross-linked rGO/FeCo in a soft polymer matrix yields remarkably high total shielding effectiveness (SET) of -41.2 dB at 12 GHz, for a meager 10 wt % filler content. In addition, the composite materials display efficient heat dissipation abilities in conjunction with the trend in their thermal conductivities. This new-age microwave-absorbing material, powered by multifunctionality and tunable magnetodielectric properties, henceforth offers an amendable, cost-effective replacement to the existing solutions.

Item Type:	Journal Article
Publication:	ACS Applied Materials & Interfaces
Publisher:	American Chemical Society
Additional Information:	The Copyright of the article belongs to the American Chemical Society.
Keywords:	Blending; Cobalt compounds; Conducting polymers; Cost effectiveness; Crosslinking; Ferromagnetism; Filled polymers; Fluorine compounds; Graphene; Iron compounds; Microwaves; Shielding; Thermal conductivity; Thermal conductivity of solids; Yarn; 3D porous framework; Conducting polymer composites; cross-linked GO-MDA; EMI shielding; Microwave absorbing materials; Poly (vinylidene fluoride)(PVDF); Reduced graphene oxides (RGO); rGO-MDA-FeCo; Multiwalled carbon nanotubes (MWCN)
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	06 Jun 2022 04:59
Last Modified:	06 Jun 2022 04:59
URI:	https://eprints.iisc.ac.in/id/eprint/72924

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