Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation
Carbon nanotubes (CNTs) have been expected to enhance thermal conductivity in various materials including composites, for applications such as thermal interface materials. However, the thermal properties of bulk CNTs and CNT composites tend not to achieve the high values of individual nanotubes. Fac...
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| Format: | Article |
| Language: | en_US |
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Institute of Materials, Minerals and Mining
2014
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| Online Access: | http://hdl.handle.net/1721.1/87080 https://orcid.org/0000-0003-3530-5819 |
| _version_ | 1826204131241492480 |
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| author | Yamamoto, N. Duong, Hai M. Wardle, Brian L. Marconnet, Amy Marie Goodson, Kenneth E. |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Yamamoto, N. Duong, Hai M. Wardle, Brian L. Marconnet, Amy Marie Goodson, Kenneth E. |
| author_sort | Yamamoto, N. |
| collection | MIT |
| description | Carbon nanotubes (CNTs) have been expected to enhance thermal conductivity in various materials including composites, for applications such as thermal interface materials. However, the thermal properties of bulk CNTs and CNT composites tend not to achieve the high values of individual nanotubes. Factors that cause such scaling effects include CNT morphology (length, alignment, entanglement, etc.), and inter-CNT/CNTmedium boundary properties. It is critical to evaluate and minimize these effects. However, structure-property relationships are not yet well understood, and thus effective use of CNTs has not been achieved for the majority of currently existing CNT polymer composites.
In this work, consistent CNT samples with well-controlled morphology were fabricated by embedding aligned CNTs in polymer to create aligned CNT polymer nanocomposites (A-CNTPNCs), as shown in Figure 1. A-CNT-PNCs were thoroughly evaluated for their anisotropic thermal properties, and a non-linear increasing trend of thermal conductivity has been observed with increasing CNT volume fraction (vCNT). This newly identified trend was understood through comparison with both analytical and numerical models of the transport behavior. Such understanding can help utilize CNTs in the most effective ways for tailoring thermal conductivities for bulk composite and other applications. |
| first_indexed | 2024-09-23T12:49:23Z |
| format | Article |
| id | mit-1721.1/87080 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:49:23Z |
| publishDate | 2014 |
| publisher | Institute of Materials, Minerals and Mining |
| record_format | dspace |
| spelling | mit-1721.1/870802022-09-28T10:13:59Z Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation Yamamoto, N. Duong, Hai M. Wardle, Brian L. Marconnet, Amy Marie Goodson, Kenneth E. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Wardle, Brian L. Yamamoto, N. Duong, Hai M. Wardle, Brian L. Carbon nanotubes (CNTs) have been expected to enhance thermal conductivity in various materials including composites, for applications such as thermal interface materials. However, the thermal properties of bulk CNTs and CNT composites tend not to achieve the high values of individual nanotubes. Factors that cause such scaling effects include CNT morphology (length, alignment, entanglement, etc.), and inter-CNT/CNTmedium boundary properties. It is critical to evaluate and minimize these effects. However, structure-property relationships are not yet well understood, and thus effective use of CNTs has not been achieved for the majority of currently existing CNT polymer composites. In this work, consistent CNT samples with well-controlled morphology were fabricated by embedding aligned CNTs in polymer to create aligned CNT polymer nanocomposites (A-CNTPNCs), as shown in Figure 1. A-CNT-PNCs were thoroughly evaluated for their anisotropic thermal properties, and a non-linear increasing trend of thermal conductivity has been observed with increasing CNT volume fraction (vCNT). This newly identified trend was understood through comparison with both analytical and numerical models of the transport behavior. Such understanding can help utilize CNTs in the most effective ways for tailoring thermal conductivities for bulk composite and other applications. 2014-05-22T13:43:58Z 2014-05-22T13:43:58Z 2011-08 Article http://purl.org/eprint/type/ConferencePaper http://hdl.handle.net/1721.1/87080 Yamamoto, N., A. M. Marconnet, H. M. Duong; K. E. Goodson, and B. L. Wardle. "Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation." 18th International Conference on Composite Materials (ICCM18), August 21-26, 2011, Jeju Island, South Korea. https://orcid.org/0000-0003-3530-5819 en_US Proceedings of the 18th International Conference on Composite Materials (ICCM18) Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Institute of Materials, Minerals and Mining Prof. Wardle via Barbara Williams |
| spellingShingle | Yamamoto, N. Duong, Hai M. Wardle, Brian L. Marconnet, Amy Marie Goodson, Kenneth E. Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation |
| title | Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation |
| title_full | Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation |
| title_fullStr | Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation |
| title_full_unstemmed | Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation |
| title_short | Non-Linear Thermal Conductivity Enhancement in Nanocomposites with Aligned-Cnt Implementation |
| title_sort | non linear thermal conductivity enhancement in nanocomposites with aligned cnt implementation |
| url | http://hdl.handle.net/1721.1/87080 https://orcid.org/0000-0003-3530-5819 |
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