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Lightweight, flexible and ultra-thin sandwich architectures for screening electromagnetic radiation

Bhingardive, Viraj and Kar, Goutam Prasanna and Bose, Suryasarathi (2016) Lightweight, flexible and ultra-thin sandwich architectures for screening electromagnetic radiation. In: RSC ADVANCES, 6 (74). pp. 70018-70024.

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Official URL: http://dx.doi.org/10.1039/c6ra14154d

Abstract

A lightweight and flexible multilayer structure consisting of poly(vinylidene fluoride) and iron particles deposited (electroless) on to a carbon nanofiber (CF) mat was successfully fabricated for electromagnetic interference shielding (EMI) application. The CF was pre-activated before depositing the iron particles by an electroless deposition technique. To enhance the shielding, a poly(vinylidene fluoride) PVDF composite containing multiwalled carbon nanotubes (MWNT) was sandwiched as an inner layer between two outer layers of iron particles deposited onto the CF mat (Fe@CF). The electroless deposition of iron particles onto the CF mat is reflected in a dramatically enhanced SE of ca. -54 dB (at 18 GHz) for an ultra-thin sheet of 0.6 mm as compared to the controlled sandwich structure (consisting of PVDF/CF) due to the presence of a conducting MWNT/PVDF film and magnetically active Fe@CF layer. This particular structure exhibits >95% absorption of the incoming EM radiation. Such a lightweight and flexible sandwich structure promises protection against EM microwave radiation.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 22 Oct 2016 09:37
Last Modified: 22 Oct 2016 09:37
URI: http://eprints.iisc.ac.in/id/eprint/55056

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