Article ; Online: Effects of structure, purity, and alignment on the heat conduction properties of a nanostructured material comprising carbon nanotubes
Dysona. Applied Science, Vol 3, Iss 2, Pp 46-
2022 Volume 55
Abstract: 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 ... ...
| Abstract | 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. |
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| Keywords | carbon nanomaterial ; carbon fibers ; thermal properties ; thermal conductivity ; umklapp scattering ; Agriculture ; S ; Technology ; T |
| Subject code | 660 |
| Language | English |
| Publishing date | 2022-07-01T00:00:00Z |
| Publisher | E-NAMTILA |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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