Issue 12, 2022

Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

Abstract

Recently, improving the applicability of transition-metal carbon/nitride (MXene) shielding devices through integration with nanomaterials and polymers has gradually attracted the attention of researchers. Although the addition of an insulation enhancement phase improves the mechanical properties of MXene shielding devices, it is still a challenge to avoid extensive damage to the conductive network and the reduction of the shielding efficiency (SE). Herein, an effective approach is demonstrated to construct an ultralight, conductive Ti3C2Tx MXene/aramid nanofiber (ANF) anisotropic aerogel. Thanks to the strong interfacial interaction between the MXene nanosheets and ANFs, abundant rigid skeleton and “cell wall” structures were constructed in the anisotropic aerogel. The aerogel was not only endowed with excellent compressibility and superelasticity, but also built a macroscopic conductive network, thus increasing the impedance mismatch interface, and ensuring the electromagnetic interference (EMI) shielding performance of the device. At an ultra-low Ti3C2Tx content (0.58 vol%), the conductivity of the composite aerogel reached a maximum of 854.9 S m−1 and the EMI SE reached 65.5 dB, which is the best efficiency value of an aerogel based on ANFs so far. In addition, the anisotropic Ti3C2Tx/ANF aerogel had consistent thermal stability and flame retardant properties. The nanosheet edge protection based on ANFs delayed the oxidation of MXene, and the EMI SE still reached 59.1 dB after 2 h of exposure in air at 250 °C. Therefore, the ultralight, superelastic, and thermally stable Ti3C2Tx/ANF anisotropic aerogel prepared in this work showed excellent application prospects in various extreme conditions.

Graphical abstract: Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

Supplementary files

Article information

Article type
Paper
Submitted
29 des. 2021
Accepted
10 feb. 2022
First published
11 feb. 2022

J. Mater. Chem. A, 2022,10, 6690-6700

Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

Y. Du, J. Xu, J. Fang, Y. Zhang, X. Liu, P. Zuo and Q. Zhuang, J. Mater. Chem. A, 2022, 10, 6690 DOI: 10.1039/D1TA11025J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements