Issue 46, 2022, Issue in Progress

Mechanical and thermal properties of carbon nanotubes in carbon nanotube fibers under tension–torsion loading

Abstract

In carbon nanotube fibers (CNFs) fabricated by spinning methods, it is well-known that the mechanical and thermal performances of CNFs are highly dependent on the mechanical and thermal properties of the inherent CNTs. Furthermore, long CNTs are usually preferred to assemble CNFs because the interaction and entanglement between long CNTs are effectively stronger than between short CNTs. However, in CNFs fabricated using long CNTs, the interior carbon nanotubes (CNTs) inevitably undergo both tension and torsion loading when they are stretched, which would influence the mechanical and thermal performances of CNFs. Here, molecular dynamics (MD) simulations were carried out to study the mechanical and thermal properties of individual CNTs under tension–torsion loading. As for mechanical properties, it was found that both the fracture strength and Young's modulus of CNTs decreased as the twist angle α increased. Besides, step-wise fracture happened due to stress concentration when the twisted CNTs are stretched. On the other hand, it could be seen that the thermal conductivity of CNTs decreased as α increased. This work presents the systematic investigation of the mechanical and thermal properties of CNTs under tension–torsion loading and provides a theoretical guideline for the design and fabrication of CNFs.

Graphical abstract: Mechanical and thermal properties of carbon nanotubes in carbon nanotube fibers under tension–torsion loading

Supplementary files

Article information

Article type
Paper
Submitted
26 Aug 2022
Accepted
04 Oct 2022
First published
21 Oct 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 30085-30093

Mechanical and thermal properties of carbon nanotubes in carbon nanotube fibers under tension–torsion loading

M. Niu, C. Cui, R. Tian, Y. Zhao, L. Miao, W. Hao, J. Li, C. Sui, X. He and C. Wang, RSC Adv., 2022, 12, 30085 DOI: 10.1039/D2RA05360H

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, 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 commercial 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