MXene@c-MWCNT adhesive silica nanofiber membranes enhancing electromagnetic interference shielding and thermal insulation performance in extreme environments

Ziyuan Han, Yutao Niu, Xuetao Shi, Duo Pan*, Hu Liu*, Hua Qiu, Weihua Chen, Ben Bin Xu, Zeinhom M. El-Bahy, Hua Hou, Eman Ramadan Elsharkawy, Mohammed A. Amin, Chuntai Liu, Zhanhu Guo*

*Corresponding author for this work

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A lightweight flexible thermally stable composite is fabricated by combining silica nanofiber membranes (SNM) with MXene@c-MWCNT hybrid film. The flexible SNM with outstanding thermal insulation are prepared from tetraethyl orthosilicate hydrolysis and condensation by electrospinning and high-temperature calcination; the MXene@c-MWCNTx:y films are prepared by vacuum filtration technology. In particular, the SNM and MXene@c-MWCNT6:4 as one unit layer (SMC1) are bonded together with 5 wt% polyvinyl alcohol (PVA) solution, which exhibits low thermal conductivity (0.066 W m−1 K−1) and good electromagnetic interference (EMI) shielding performance (average EMI SET, 37.8 dB). With the increase in functional unit layer, the overall thermal insulation performance of the whole composite film (SMCx) remains stable, and EMI shielding performance is greatly improved, especially for SMC3 with three unit layers, the average EMI SET is as high as 55.4 dB. In addition, the organic combination of rigid SNM and tough MXene@c-MWCNT6:4 makes SMCx exhibit good mechanical tensile strength. Importantly, SMCx exhibit stable EMI shielding and excellent thermal insulation even in extreme heat and cold environment. Therefore, this work provides a novel design idea and important reference value for EMI shielding and thermal insulation components used in extreme environmental protection equipment in the future.
Original languageEnglish
Article number195
Number of pages17
JournalNano-Micro Letters
Issue number1
Early online date14 May 2024
Publication statusE-pub ahead of print - 14 May 2024

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