Frequency-tunable and absorption/transmission-switchable microwave absorber based on a chitin-nanofiber-derived elastic carbon aerogel

Li, Xiang; Zhu, Luting; Kasuga, Takaaki et al.

Chemical Engineering Journal, 2023, 469, 144010

Number of Access:722（2025-10-21 01:15 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/92499

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Title
Frequency-tunable and absorption/transmission-switchable microwave absorber based on a chitin-nanofiber-derived elastic carbon aerogel
Creator
ORCID
0000-0002-8044-7050 0000-0002-8044-7050
researchmap permalink
xiangli xiangli
CreatorName
Li, Xiang
CreatorName
Zhu, Luting
CreatorName
Kasuga, Takaaki
NRID
1000080379031 1000080379031
researchmap permalink
read0151141 read0151141
Scopus Author ID
9846851200 9846851200
CreatorName
Nogi, Masaya
NRID
1000030634539 1000030634539
ORCID
0000-0001-6295-1731 0000-0001-6295-1731
researchmap permalink
hkoga hkoga
Scopus Author ID
7201439917 7201439917
CreatorName
Koga, Hirotaka
Subject
Absorption frequency tuning
Absorption/transmission switching
Chitin nanofiber
Elastic carbon aerogel
Microwave absorption
Description
Li X., Zhu L., Kasuga T., et al. Frequency-tunable and absorption/transmission-switchable microwave absorber based on a chitin-nanofiber-derived elastic carbon aerogel. Chemical Engineering Journal 469, 144010 (2023); https://doi.org/10.1016/j.cej.2023.144010.
Abstract
The increasing use of microwaves in wireless communications has caused severe electromagnetic pollution. As the frequency range for wireless communication is expanding, it is highly desirable to develop a microwave absorber that can smartly and reversibly tune its absorption and transmission properties on demand to transmit required frequencies and absorb unwanted frequencies. Herein, an absorption-frequency-tunable and absorption/transmission-switchable microwave absorber is developed based on the controlled compression of a chitin-derived elastic carbon aerogel. The maximum absorption frequency is tuned from 10.4 to 11.0, 11.5, and 12.1 GHz by varying the compression strain from 0 to 20, 40, and 60%, respectively, while the maximum absorption intensity is maintained at approximately −40 dB. This frequency-tunable absorption is achieved by reducing the thickness of the carbon aerogel while retaining its moderate dielectric loss tangent. Further compression from 60 to 80% switches the carbon aerogel from being a microwave absorber to transmitter while causing impedance mismatch and changing its dielectric loss tangent from moderate to low levels. The frequency tunability and microwave absorption/transmission switching capability are reversible and repeatable for at least 60,000 cycles of compression and recovery. This study provides insights into the smart and reversible control of microwave absorbing properties and paves the way for multifunctional and robust absorbers.
Publisher
Elsevier B.V.
Source Title
Chemical Engineering Journal
Volume (Issue)
469
Page
144010
Date of Issued
2023-08-01
Language
English
Handle URL
https://hdl.handle.net/11094/92499
PISSN
13858947
NCID
AA11095026
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.cej.2023.144010
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article