We highlight the effect that mesoscopic shape of individual multi-walled carbon nanotubes (MWCNTs) has on their collective thermal properties when they are lumped together into MWCNT mats. The thermal properties depend both on the mesoscopic shape of the MWCNTs and on the structure of the mat. The mesoscopic shape is represented by static bending persistence length (lsp) and the mat structure is represented by network length (le). It is demonstrated that various thermal properties depend on lsp. The variable thermal properties are linear thermal expansivity, thermal diffusivity, specific heat capacity, and thermal conductivity. In the case of n > 1, the MWCNT mats contract with increasing temperature. On the contrary, in the case of n < 1, the mats expand with increasing temperature. The apparent thermal conductivity increases with increasing lsp.
Bibliographical noteFunding Information:
This study was supported by research fund from Dong-A University .
- Mesoscopic shape
- Multi-walled carbon nanotubes
- Static bend point
- Static bending persistence length
- Thermal expansivity
- Thermal properties
ASJC Scopus subject areas
- General Materials Science
- General Physics and Astronomy