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Title: Nanocellulose‐MXene biomimetic aerogels with orientation‐tunable electromagnetic interference shielding performance
Authors: Zeng, Zhihui
Wang, Changxian
Siqueira, Gilberto
Han, Daxin
Huch, Anja
Abdolhosseinzadeh, Sina
Heier, Jakob
Nüesch, Frank
Zhang, John Chuanfang
Nyström, Gustav
Keywords: Engineering::Materials
Issue Date: 2020
Source: Zeng, Z., Wang, C., Siqueira, G., Han, D., Huch, A., Abdolhosseinzadeh, S., . . . Nyström, G. (2020). Nanocellulose‐MXene biomimetic aerogels with orientation‐tunable electromagnetic interference shielding performance. Advanced Science, 7(15), 2000979-. doi:10.1002/advs.202000979
Journal: Advanced Science 
Abstract: Designing lightweight nanostructured aerogels for high‐performance electromagnetic interference (EMI) shielding is crucial yet challenging. Ultrathin cellulose nanofibrils (CNFs) are employed for assisting in building ultralow‐density, robust, and highly flexible transition metal carbides and nitrides (MXenes) aerogels with oriented biomimetic cell walls. A significant influence of the angles between oriented cell walls and the incident EM wave electric field direction on the EMI shielding performance is revealed, providing an intriguing microstructure design strategy. MXene “bricks” bonded by CNF “mortars” of the nacre‐like cell walls induce high mechanical strength, electrical conductivity, and interfacial polarization, yielding the resultant MXene/CNF aerogels an ultrahigh EMI shielding performance. The EMI shielding effectiveness (SE) of the aerogels reaches 74.6 or 35.5 dB at a density of merely 8.0 or 1.5 mg cm–3, respectively. The normalized surface specific SE is up to 189 400 dB cm2 g–1, significantly exceeding that of other EMI shielding materials reported so far.
ISSN: 2198-3844
DOI: 10.1002/advs.202000979
Rights: © 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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