Cellulose composite aerogel for highly efficient electromagnetic interference shielding

An ultra-light and highly conductive cellulose composite aerogel was fabricated by a simple, efficient and environmentally benign strategy. The scaffold structure was well designed from nanofibrillar networks to nanosheet networks by controlling the concentration of cellulose in the sodium hydroxide...

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Veröffentlicht in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-01, Vol.3 (9), p.4983-4991
Hauptverfasser: Huang, Hua-Dong, Liu, Chun-Yan, Zhou, Dong, Jiang, Xin, Zhong, Gan-Ji, Yan, Ding-Xiang, Li, Zhong-Ming
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container_end_page 4991
container_issue 9
container_start_page 4983
container_title Journal of materials chemistry. A, Materials for energy and sustainability
container_volume 3
creator Huang, Hua-Dong
Liu, Chun-Yan
Zhou, Dong
Jiang, Xin
Zhong, Gan-Ji
Yan, Ding-Xiang
Li, Zhong-Ming
description An ultra-light and highly conductive cellulose composite aerogel was fabricated by a simple, efficient and environmentally benign strategy. The scaffold structure was well designed from nanofibrillar networks to nanosheet networks by controlling the concentration of cellulose in the sodium hydroxide/urea solution. The obtained conductive aerogel was first reported as an electromagnetic interference shielding material; it exhibits an electromagnetic interference (EMI) shielding effectiveness of ∼20.8 dB and a corresponding specific EMI shielding effectiveness as high as ∼219 dB cm 3 g −1 with microwave absorption as the dominant EMI shielding mechanism in the microwave frequency range of 8.2–12.4 GHz at a density of as low as 0.095 g cm −3 . This result demonstrates that this type of green conductive aerogel has the potential to be used as lightweight shielding material against electromagnetic radiation, especially for aircraft and spacecraft applications.
doi_str_mv 10.1039/C4TA05998K
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source Alma/SFX Local Collection; Royal Society of Chemistry E-Journals
subjects Aerogels
Cellulose
Density
Electromagnetic interference
Electromagnetic interference shielding
Nanostructure
Networks
Noise levels
Shielding
title Cellulose composite aerogel for highly efficient electromagnetic interference shielding
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