Constructing Thermal Insulation Materials from Highly Thermal Conductive Carbon Nanomaterials
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-07-11 |
| Journal | ECS Meeting Abstracts |
| Authors | Zi Yuan, Guo Chen, Duanliang Zhou, Peng Liu, Kaili Jiang |
Abstract
Section titled āAbstractāGraphene and carbon nanotubes are typical highly thermal conductive carbon nanomaterials, which have thermal conductivities comparable to diamond. High performance thermal insulation materials can be obtained by properly assembling graphene or carbon nanotubes into nanostructured macro-assemblies. For examples, a continuous single layer graphene winds on a cylinder, forming a graphene scroll with an interlayer spacing of 30nm. Then the thermal conductivity along the radial direction is only 10 -11 of the in-plane thermal conductivity of graphene. However, this ideal scroll structure is not easy to implement. Here we show that, by stacking super-aligned carbon nanotube (SACNT) films together, SACNT-stacked films (SACNT-SF) can be obtained, which outperforms the traditional TIMs for a wide range of working temperatures. In vacuum, the effective thermal conductivity of SACNT-SF is only 0.004W/mĀ·K at room temperature, and 0.03 W/mĀ·K at 2600ā. Theoretical analysis indicates that the nanometer diameter of the carbon nanotube, the nanoporous and anisotropic structure and the ultra-low density of SACNT-SF, and the high extinction coefficient of sp 2 -carbon play critical roles in reducing heat conduction via solid skeletons, radiation, and gas medium. References [1] https://www.researchsquare.com/article/rs-4324204/v1 Fig. 1 The measured effective thermal conductivity of SACNT-SF (represented by red stars) in linear scale( left ) and log scale( right ), together with that of other TIMs from literatures. Figure 1