期刊
CARBON
卷 182, 期 -, 页码 806-814出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.06.054
关键词
MXene; Wood derived aerogel; EMI shielding; Microwave absorption
资金
- National Natural Science Foundation of China [51702197]
- Doctoral Scientific Research Foundation of Shaanxi University of Science Technology [2019BJ4418]
This study developed an anisotropic MXene@Wood nanocomposite aerogel with EMI shielding and EM absorbing properties in different directions by modifying natural wood, assembling f-Ti3C2Tx nanosheets, and achieving ideal structural load carrying capacity at the parallel growth direction and high compressibility at the vertical growth direction simultaneously.
The advanced electromagnetic interference (EMI) shielding and electromagnetic (EM) wave absorbing materials are greatly desired for the elimination of increasingly serious electromagnetic radiation pollution. Herein, the natural wood was delignified to fabricate the wood aerogel as a porous framework, then f-Ti3C2Tx nanosheets were assembled into the wood aerogel to give a novel ultralight, highly compressible and anisotropic MXene@Wood (M@W) nanocomposite aerogel (0.108 g/cm(3)), which possesses both EMI shielding and EM absorbing properties at the different directions. Because of the anisotropic wood aerogel skeleton, the M@W aerogels present channel-like microstructure and ideal structural load carrying capacity at the parallel growth direction, and the layered microstructure and highly compressibility at the vertical growth direction are obtained at the same time. By regulating the f-Ti3C2Tx MXene loading, the as-prepared M@W aerogel can achieve a striking high EMI shielding effectiveness of 72 dB at the parallel growth direction and a broadened effective absorption bandwidth covering 8.2-12.4 GHz at the vertical growth direction simultaneously. This work provides a facile alternative strategy for developing wood-derived anisotropic MXene@Wood nanocomposite aerogel, which possesses both EMI shielding and EM absorbing properties at different directions. (C) 2021 Elsevier Ltd. All rights reserved.
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