Fabricating strong and tough aramid fibers by small addition of carbon nanotubes

Jiajun Luo, Yeye Wen, Xiangzheng Jia, Xudong Lei, Zhenfei Gao, Muqiang Jian, Zhihua Xiao, Lanying Li, Jiangwei Zhang, Tao Li, Hongliang Dong, Xianqian Wu (), Enlai Gao (), Kun Jiao () and Jin Zhang ()
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Jiajun Luo: Peking University
Yeye Wen: Peking University
Xiangzheng Jia: Wuhan University
Xudong Lei: Chinese Academy of Sciences
Zhenfei Gao: Beijing Graphene Institute (BGI)
Muqiang Jian: Beijing Graphene Institute (BGI)
Zhihua Xiao: Peking University
Lanying Li: China Bluestar Chengrand Chemical Co., Ltd
Jiangwei Zhang: Inner Mongolia University
Tao Li: Beijing Graphene Institute (BGI)
Hongliang Dong: Center for High Pressure Science and Technology Advanced Research
Xianqian Wu: Chinese Academy of Sciences
Enlai Gao: Wuhan University
Kun Jiao: Peking University
Jin Zhang: Peking University

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Synthetic high-performance fibers present excellent mechanical properties and promising applications in the impact protection field. However, fabricating fibers with high strength and high toughness is challenging due to their intrinsic conflicts. Herein, we report a simultaneous improvement in strength, toughness, and modulus of heterocyclic aramid fibers by 26%, 66%, and 13%, respectively, via polymerizing a small amount (0.05 wt%) of short aminated single-walled carbon nanotubes (SWNTs), achieving a tensile strength of 6.44 ± 0.11 GPa, a toughness of 184.0 ± 11.4 MJ m−3, and a Young’s modulus of 141.7 ± 4.0 GPa. Mechanism analyses reveal that short aminated SWNTs improve the crystallinity and orientation degree by affecting the structures of heterocyclic aramid chains around SWNTs, and in situ polymerization increases the interfacial interaction therein to promote stress transfer and suppress strain localization. These two effects account for the simultaneous improvement in strength and toughness.

Date: 2023
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DOI: 10.1038/s41467-023-38701-4

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