Journal
COMPOSITES PART B-ENGINEERING
Volume 217, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.108853
Keywords
MXene(Ti3C2Tx); Aramid nanofibers (ANFs); Aerogel; EMI shielding
Funding
- National Natural Science Foundation of China [52003145]
- Opening Foundation of Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry [KFKT2020-07]
- National Key Research and Development Plan [2017YFB0308302]
- Zhejiang Province key research and development project [2019C04008]
- Shaanxi Natural Science Basic Research Program [2020JQ-724]
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The study developed a micro-porous structure MXene/aramid nanofibers hybrid aerogel with efficient EMI shielding performance and reversible compressibility, which can be regulated by MXene content and thickness.
Currently, extensive utilization of electronic devices and wireless equipment require human to take affirmative measures to weaken unwanted electromagnetic wave radiations. Herein, micro-porous structure MXene/aramid nanofibers hybrid aerogel was developed from aramid nanofibers and MXene(Ti3C2Tx) flakes through freeze-drying approach. The robust aramid nanofibers established foundation for oxidation protection and reversible compressibility in skeleton. Due to the unique micro-porous structure, the MXene(Ti3C2Tx)/aramid nanofibers hybrid aerogel remained efficient shielding capacity, whose electromagnetic interference (EMI) shielding effectiveness and specific EMI shielding effectiveness reached similar to 56.8 dB and 3645.7 dB cm(2) g(-1) at thickness of 1.9 mm in X-band. Furthermore, the shielding performance could be regulated by MXene(Ti3C2Tx) content and thickness. With increasing MXene(Ti3C2Tx) loading, the porous size of MXene(Ti3C2Tx)/aramid nanofibers hybrid aerogel enlarged, and the MXene(Ti3C2Tx)/aramid nanofibers hybrid aerogel became tough and robust. Under 40% strain, the maximum compressive stress of MXene(Ti3C2Tx)/aramid nanofibers hybrid aerogel with 21 wt% MXene(Ti3C2Tx) flakes content reached similar to 210 kPa. This work provided feasible avenue for fabricating hybrid aerogel with reversible compressibility and efficient EMI shielding performance simultaneously.
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