Acid enhanced zipping effect to densify MWCNT packing for multifunctional MWCNT films with ultra-high electrical conductivity

Hong Wang (), Xu Sun, Yizhuo Wang, Kuncai Li, Jing Wang, Xu Dai, Bin Chen, Daotong Chong, Liuyang Zhang and Junjie Yan
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Hong Wang: Xi’an Jiaotong University
Xu Sun: Xi’an Jiaotong University
Yizhuo Wang: Xi’an Jiaotong University
Kuncai Li: Xi’an Jiaotong University
Jing Wang: Xi’an Jiaotong University
Xu Dai: Xi’an Jiaotong University
Bin Chen: Xi’an Jiaotong University
Daotong Chong: Xi’an Jiaotong University
Liuyang Zhang: Xi’an Jiaotong University
Junjie Yan: Xi’an Jiaotong University

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract The outstanding electrical and mechanical properties remain elusive on macroscopic carbon nanotube (CNT) films because of the difficult material process, which limits their wide practical applications. Herein, we report high-performance multifunctional MWCNT films that possess the specific electrical conductivity of metals as well as high strength. These MWCNT films were synthesized by a floating chemical vapor deposition method, purified at high temperature and treated with concentrated HCl, and then densified due to the developed chlorosulfonic acid-enhanced zipping effect. These large scalable films exhibit high electromagnetic interference shielding efficiency, high thermoelectric power factor, and high ampacity because of the densely packed crystalline structure of MWCNTs, which are promising for practical applications.

Date: 2023
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DOI: 10.1038/s41467-023-36082-2

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