Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes
The increasing popularity of carbon nanotubes has created a demand for a fundamental understanding of thermal transport characteristics in nanostructured materials. However, the effects of impurities, misalignments, and structure factors on the thermal conductivity of carbon nanotube films and fiber...
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| Format: | Article |
| Language: | English |
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E-NAMTILA
2022-07-01
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| Series: | Dysona. Applied Science |
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| Online Access: | http://applied.dysona.org/article_145144_dd90d615ce420a5b9ddec1432e52d41f.pdf |
| _version_ | 1829107124639105024 |
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| author | Junjie Chen |
| author_facet | Junjie Chen |
| author_sort | Junjie Chen |
| collection | DOAJ |
| description | The increasing popularity of carbon nanotubes has created a demand for a fundamental understanding of thermal transport characteristics in nanostructured materials. However, the effects of impurities, misalignments, and structure factors on the thermal conductivity of carbon nanotube films and fibers are still poorly understood. In this article, carbon nanotube films and fibers were produced, and the thermal conductivity was determined using the parallel thermal conductance technique. The effects of carbon nanotube structure, purity, and alignment on the heat conduction properties were investigated to understand thermal transport characteristics in the nanostructured material. The importance of bulk density and cross-sectional area was determined experimentally. The results indicated that the prepared carbon nanotube films and fibers are highly efficient at conducting heat. The structure, purity, and alignment of carbon nanotubes played a fundamentally important role in determining the heat conduction properties of carbon films and fibers. Single-walled carbon nanotube films and fibers had higher thermal conductivity, while the presence of non-carbonaceous impurities degraded the thermal performance due to the low degree of bundle contact. The thermal conductivity may present power law dependence with temperature. The specific thermal conductivity decreased with increasing bulk density. A maximum specific thermal conductivity was obtained at room temperature, but Umklapp scattering occurred. The fibers have better specific thermal conductivity properties than the films due to the increased degree of bundle alignment. |
| first_indexed | 2024-12-12T06:33:10Z |
| format | Article |
| id | doaj.art-64913fc9da01476b9318003734664f96 |
| institution | Directory Open Access Journal |
| issn | 2708-6283 |
| language | English |
| last_indexed | 2024-12-12T06:33:10Z |
| publishDate | 2022-07-01 |
| publisher | E-NAMTILA |
| record_format | Article |
| series | Dysona. Applied Science |
| spelling | doaj.art-64913fc9da01476b9318003734664f962022-12-22T00:34:32ZengE-NAMTILADysona. Applied Science2708-62832022-07-0132465510.30493/das.2022.327865145144Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubesJunjie Chen0Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, Henan, ChinaThe increasing popularity of carbon nanotubes has created a demand for a fundamental understanding of thermal transport characteristics in nanostructured materials. However, the effects of impurities, misalignments, and structure factors on the thermal conductivity of carbon nanotube films and fibers are still poorly understood. In this article, carbon nanotube films and fibers were produced, and the thermal conductivity was determined using the parallel thermal conductance technique. The effects of carbon nanotube structure, purity, and alignment on the heat conduction properties were investigated to understand thermal transport characteristics in the nanostructured material. The importance of bulk density and cross-sectional area was determined experimentally. The results indicated that the prepared carbon nanotube films and fibers are highly efficient at conducting heat. The structure, purity, and alignment of carbon nanotubes played a fundamentally important role in determining the heat conduction properties of carbon films and fibers. Single-walled carbon nanotube films and fibers had higher thermal conductivity, while the presence of non-carbonaceous impurities degraded the thermal performance due to the low degree of bundle contact. The thermal conductivity may present power law dependence with temperature. The specific thermal conductivity decreased with increasing bulk density. A maximum specific thermal conductivity was obtained at room temperature, but Umklapp scattering occurred. The fibers have better specific thermal conductivity properties than the films due to the increased degree of bundle alignment.http://applied.dysona.org/article_145144_dd90d615ce420a5b9ddec1432e52d41f.pdfcarbon nanomaterialcarbon fibersthermal propertiesthermal conductivityumklapp scattering |
| spellingShingle | Junjie Chen Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes Dysona. Applied Science carbon nanomaterial carbon fibers thermal properties thermal conductivity umklapp scattering |
| title | Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes |
| title_full | Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes |
| title_fullStr | Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes |
| title_full_unstemmed | Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes |
| title_short | Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes |
| title_sort | effects of structure purity and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes |
| topic | carbon nanomaterial carbon fibers thermal properties thermal conductivity umklapp scattering |
| url | http://applied.dysona.org/article_145144_dd90d615ce420a5b9ddec1432e52d41f.pdf |
| work_keys_str_mv | AT junjiechen effectsofstructurepurityandalignmentontheheatconductionpropertiesofananostructuredmaterialcomprisingcarbonnanotubes |