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Porous fibres of a polymer blend for broadband microwave absorption

Bora, PJ and Khanum, KK and Ramesh, RK and Vinoy, KJ and Ramamurthy, PC (2021) Porous fibres of a polymer blend for broadband microwave absorption. In: Materials Advances, 2 (11). pp. 3613-3619.

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Official URL: https://doi.org/10.1039/d1ma00114k


This study is on the advantages of introducing pores in polymer blend fibres in broadband microwave absorption. The electrospun porous and non-porous fibres of a blend, polyvinyl butyral and poly(3,4-ethylenedioxythiophene)polystyrene sulfonate-PEDOT:PSS (PPPS), are explored. The porous PPPS fibres (PPPS-f) demonstrated an outstanding reflection loss (RL) bandwidth (8.2-12.4 GHz, X-band) with a minimum RL of -23 dB, whereas the non-porous PPPS-f of the same thickness did not exhibit even adequate levels of RL. A high dielectric loss tangent and the electromagnetic attenuation constant (with a phase constant) are the major factors contributing to this difference. Additionally, impedance matching and the electromagnetic energy density are observed to be the major factors in porous PPPS-f achieving this excellent microwave absorption bandwidth, a finding supported by microwave simulation data. A bi-layer structure of porous PPPS-f and non-porous PPPS-f is also proposed to achieve an X-band absorption bandwidth at minimum thickness. An android mobile app is also developed to identify the RL of single and bi-layered porous PPPS-f and non-porous PPPS-f conveniently. © 2021 The Royal Society of Chemistry.

Item Type: Journal Article
Publication: Materials Advances
Publisher: Royal Society of Chemistry
Additional Information: The copyright for this article belongs to Authors
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 31 Aug 2021 09:34
Last Modified: 31 Aug 2021 09:34
URI: http://eprints.iisc.ac.in/id/eprint/69492

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