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Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes
This work documents the annealing effect on the thermal conductivity of nanotube film (CNTB) and carbon nanotube fiber (CNTF). The thermal properties of carbon nanotube samples are measured by using the transient electro-thermal (TET) technique, and the experimental phenomena are analyzed based on n...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746370/ https://www.ncbi.nlm.nih.gov/pubmed/35010033 http://dx.doi.org/10.3390/nano12010083 |
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author | Lin, Huan Xu, Jinbo Shen, Fuhua Zhang, Lijun Xu, Shen Dong, Hua Luo, Siyi |
author_facet | Lin, Huan Xu, Jinbo Shen, Fuhua Zhang, Lijun Xu, Shen Dong, Hua Luo, Siyi |
author_sort | Lin, Huan |
collection | PubMed |
description | This work documents the annealing effect on the thermal conductivity of nanotube film (CNTB) and carbon nanotube fiber (CNTF). The thermal properties of carbon nanotube samples are measured by using the transient electro-thermal (TET) technique, and the experimental phenomena are analyzed based on numerical simulation. During the current annealing treatment, CNTB1 always maintains the negative temperature coefficient of resistance (TCR), and its thermal diffusivity increases gradually. When the annealing current is 200 mA, it increases by 33.62%. However, with the increase of annealing current, the TCR of CNTB2 changes from positive to negative. The disparity between CNTB2 and CNTB1 suggests that they have different physical properties and even structures along their lengths. The high-level thermal diffusivity of CNTB2 and CNTF are 2.28–2.46 times and 1.65–3.85 times higher than the lower one. The results show that the decrease of the thermal diffusivity for CNTB2 and CNTF is mainly caused by enhanced Umklapp scattering, the high thermal resistance and torsional sliding during high temperature heating. |
format | Online Article Text |
id | pubmed-8746370 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-87463702022-01-11 Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes Lin, Huan Xu, Jinbo Shen, Fuhua Zhang, Lijun Xu, Shen Dong, Hua Luo, Siyi Nanomaterials (Basel) Article This work documents the annealing effect on the thermal conductivity of nanotube film (CNTB) and carbon nanotube fiber (CNTF). The thermal properties of carbon nanotube samples are measured by using the transient electro-thermal (TET) technique, and the experimental phenomena are analyzed based on numerical simulation. During the current annealing treatment, CNTB1 always maintains the negative temperature coefficient of resistance (TCR), and its thermal diffusivity increases gradually. When the annealing current is 200 mA, it increases by 33.62%. However, with the increase of annealing current, the TCR of CNTB2 changes from positive to negative. The disparity between CNTB2 and CNTB1 suggests that they have different physical properties and even structures along their lengths. The high-level thermal diffusivity of CNTB2 and CNTF are 2.28–2.46 times and 1.65–3.85 times higher than the lower one. The results show that the decrease of the thermal diffusivity for CNTB2 and CNTF is mainly caused by enhanced Umklapp scattering, the high thermal resistance and torsional sliding during high temperature heating. MDPI 2021-12-29 /pmc/articles/PMC8746370/ /pubmed/35010033 http://dx.doi.org/10.3390/nano12010083 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lin, Huan Xu, Jinbo Shen, Fuhua Zhang, Lijun Xu, Shen Dong, Hua Luo, Siyi Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes |
title | Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes |
title_full | Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes |
title_fullStr | Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes |
title_full_unstemmed | Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes |
title_short | Effects of Current Annealing on Thermal Conductivity of Carbon Nanotubes |
title_sort | effects of current annealing on thermal conductivity of carbon nanotubes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746370/ https://www.ncbi.nlm.nih.gov/pubmed/35010033 http://dx.doi.org/10.3390/nano12010083 |
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