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Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity

Constructing hierarchical structures is indispensable to tuning the electromagnetic properties of carbon-based materials. Here, carbon microtubes with nanometer wall thickness and micrometer diameter were fabricated by a feasible approach with economical and sustainable kapok fiber. The carbonized k...

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Autores principales: Zhao, Yanfang, Long, Aichun, Zhao, Pengfei, Liao, Lusheng, Wang, Rui, Li, Gaorong, Wang, Bingbing, Liao, Xiaoxue, Yu, Rentong, Liao, Jianhe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9655754/
https://www.ncbi.nlm.nih.gov/pubmed/36365495
http://dx.doi.org/10.3390/polym14214501
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author Zhao, Yanfang
Long, Aichun
Zhao, Pengfei
Liao, Lusheng
Wang, Rui
Li, Gaorong
Wang, Bingbing
Liao, Xiaoxue
Yu, Rentong
Liao, Jianhe
author_facet Zhao, Yanfang
Long, Aichun
Zhao, Pengfei
Liao, Lusheng
Wang, Rui
Li, Gaorong
Wang, Bingbing
Liao, Xiaoxue
Yu, Rentong
Liao, Jianhe
author_sort Zhao, Yanfang
collection PubMed
description Constructing hierarchical structures is indispensable to tuning the electromagnetic properties of carbon-based materials. Here, carbon microtubes with nanometer wall thickness and micrometer diameter were fabricated by a feasible approach with economical and sustainable kapok fiber. The carbonized kapok fiber (CKF) exhibits microscale pores from the inherent porous templates as well as pyrolysis-induced nanopores inside the wall, affording the hierarchical carbon microtube with excellent microwave absorbing performance over broad frequency. Particularly, CKF-650 exhibits an optimized reflection loss (RL) of −62.46 dB (10.32 GHz, 2.2 mm), while CKF-600 demonstrates an effective absorption bandwidth (RL < −10 dB) of 6.80 GHz (11.20–18.00 GHz, 2.8 mm). Moreover, more than 90% of the incident electromagnetic wave ranging from 2.88 GHz to 18.00 GHz can be dissipated by simply controlling the carbonization temperature of KF and/or the thickness of the carbon-microtube-based absorber. These encouraging findings provide a facile alternative route to fabricate microwave absorbers with broadband attenuation capacity by utilizing sustainable biomass.
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spelling pubmed-96557542022-11-15 Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity Zhao, Yanfang Long, Aichun Zhao, Pengfei Liao, Lusheng Wang, Rui Li, Gaorong Wang, Bingbing Liao, Xiaoxue Yu, Rentong Liao, Jianhe Polymers (Basel) Article Constructing hierarchical structures is indispensable to tuning the electromagnetic properties of carbon-based materials. Here, carbon microtubes with nanometer wall thickness and micrometer diameter were fabricated by a feasible approach with economical and sustainable kapok fiber. The carbonized kapok fiber (CKF) exhibits microscale pores from the inherent porous templates as well as pyrolysis-induced nanopores inside the wall, affording the hierarchical carbon microtube with excellent microwave absorbing performance over broad frequency. Particularly, CKF-650 exhibits an optimized reflection loss (RL) of −62.46 dB (10.32 GHz, 2.2 mm), while CKF-600 demonstrates an effective absorption bandwidth (RL < −10 dB) of 6.80 GHz (11.20–18.00 GHz, 2.8 mm). Moreover, more than 90% of the incident electromagnetic wave ranging from 2.88 GHz to 18.00 GHz can be dissipated by simply controlling the carbonization temperature of KF and/or the thickness of the carbon-microtube-based absorber. These encouraging findings provide a facile alternative route to fabricate microwave absorbers with broadband attenuation capacity by utilizing sustainable biomass. MDPI 2022-10-24 /pmc/articles/PMC9655754/ /pubmed/36365495 http://dx.doi.org/10.3390/polym14214501 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Yanfang
Long, Aichun
Zhao, Pengfei
Liao, Lusheng
Wang, Rui
Li, Gaorong
Wang, Bingbing
Liao, Xiaoxue
Yu, Rentong
Liao, Jianhe
Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity
title Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity
title_full Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity
title_fullStr Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity
title_full_unstemmed Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity
title_short Natural Hollow Fiber-Derived Carbon Microtube with Broadband Microwave Attenuation Capacity
title_sort natural hollow fiber-derived carbon microtube with broadband microwave attenuation capacity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9655754/
https://www.ncbi.nlm.nih.gov/pubmed/36365495
http://dx.doi.org/10.3390/polym14214501
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