A universal approach to ‘host’ carbon nanotubes on a charge triggered ‘guest’ interpenetrating polymer network for excellent ‘green’ electromagnetic interference shielding

Manna, K and Sen Gupta, R and Bose, S (2022) A universal approach to ‘host’ carbon nanotubes on a charge triggered ‘guest’ interpenetrating polymer network for excellent ‘green’ electromagnetic interference shielding. In: Nanoscale .

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Abstract

The widespread use of miniaturized electronic gadgets today faces stiff reliability obstacles from factors like stray electromagnetic signals. The challenge is to design lightweight shielding materials that combine small volume and high-frequency operations to reliably reduce/eliminate electromagnetic interference. Herein, in the first of its kind, a sequential interpenetrating polymeric network (IPN) membrane was used to host a CNT construct through a stimuli-responsive trigger. The proposed construct besides being robust, sustainable, and scalable is a universal approach to fabricate a CNT construct where conventional strategies are not amenable. This approach of self-assembling counter-charged CNTs also maximizes the number of CNTs in the final construct, thereby greatly enhancing the shielding performance dominated by 90% absorption in a wide frequency band of 8.2-26.5 GHz. The IPN-CNT construct achieves specific shielding effectiveness in the range of ca. 1607-5715 dB cm2 g−1 by tuning the thickness of the CNT construct with an endearing green index (gs ≈ 1.8). The performance of such an ultra-thin, light-weight IPN-CNT construct remained unchanged when subjected to 10 000 bending cycles and on exposure to different chemical environments, indicating outstanding mechanical/chemical stability.

Item Type:	Journal Article
Publication:	Nanoscale
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Carbon nanotubes; Chemical stability; Electromagnetic pulse; Electromagnetic shielding; Electromagnetic wave interference, Electromagnetic interference shielding; Electromagnetic signals; Electronic gadgets; High frequency operation; Interpenetrating polymeric network; Miniaturized electronics; Self-assembling; Shielding materials; Stimuli-responsive; Universal approach, Signal interference
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	03 Feb 2023 03:43
Last Modified:	03 Feb 2023 03:43
URI:	https://eprints.iisc.ac.in/id/eprint/79800

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