Flexible papers derived from polypyrrole deposited cellulose nanofibers for enhanced electromagnetic interference shielding in gigahertz frequencies - Archive ouverte HAL Access content directly
Journal Articles Journal of Applied Polymer Science Year : 2021

Flexible papers derived from polypyrrole deposited cellulose nanofibers for enhanced electromagnetic interference shielding in gigahertz frequencies

(1, 2) , (3) , (4) , (5) , (6) , (1) , (2) , (3)
1
2
3
4
5
6

Abstract

An array of highly conductive, lightweight and flexible cellulose nanopapers as effective attenuators of electromagnetic radiations within 8.2–12.4 GHz (X band) were formulated via in situ polymerization of pyrrole monomers on to cellulose nanofibers (CNFs). It is quite obvious that the free hydroxyl groups on the surface of CNFs facilitate the formation of intense intermolecular hydrogen bonding with PPy which is envisaged for its excellent electromagnetic shielding performance with an average shielding effectiveness of ca. –22 dB (>99% attenuation) at 8.2 GHz for a paper having 1 mm thickness. The fabricated papers displayed a predominant absorption mechanism (ca. 89%) rather than reflection (ca. 11%) for efficiently attenuating electromagnetic radiations, which has a considerable importance in the modern telecommunication sector. Thus, the designed PPy/CNF papers would replace the conventional metal‐based shields and pave way for the development of green microwave attenuators functioning via a strong absorption mechanism. The PPy/CNF nanopapers exhibited a DC conductivity of 0.21 S/cm, a prime requisite for the development of highly efficient electromagnetic shields. Undoubtedly, such nanopapers can be employed in wide range of applications such as electrodes for supercapacitors and other freestanding flexible paper‐based devices.
Fichier principal
Vignette du fichier
Flexible-papers-derived-from-polypyrrole-deposited-cellulose-nanofibers-for-enhanced-electromagnetic-interference-shielding-in-gigahertz-frequencies.pdf (2.78 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03009170 , version 1 (18-12-2020)

Identifiers

Cite

Deepu Gopakumar, Avinash Pai, Yasir Beeran Pottathara, Daniel Pasquini, Luís Carlos Morais, et al.. Flexible papers derived from polypyrrole deposited cellulose nanofibers for enhanced electromagnetic interference shielding in gigahertz frequencies. Journal of Applied Polymer Science, 2021, 138 (16), pp.1-11/50262. ⟨10.1002/app.50262⟩. ⟨hal-03009170⟩
41 View
108 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More