Carbon Nanostructure Enabled High Performance Thermal Insulating Material

Kaili Jiang,Zi Yuan,Guo Chen,Duanliang Zhou,Peng Liu,Liang Liu,Shoushan Fan

crossref（2024）

Cited 0|Views31

Abstract

Abstract The high-temperature thermal insulation materials (TIM) are critical for aerospace technology. The more thermal insulation it is, the thinner TIM is needed. 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/m·K at room temperature, and 0.03 W/m·K at 2600℃. 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 sp2-carbon play critical roles in reducing heat conduction via solid skeletons, radiation, and gas medium. The SACNT-SF is nanometer thick and fully flexible, which can be continuously and freely winded on various shapes of surfaces, generating a conformal TIM for a broad spectrum of applications.

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【要点】：该论文展示了通过堆叠超定向碳纳米管(SACNT)膜得到的SACNT堆叠膜(SACNT-SF)，在宽工作温度范围内其热导率远优于传统热绝缘材料。

【方法】：通过将超定向碳纳米管(SACNT)膜堆叠在一起，制成SACNT堆叠膜(SACNT-SF)。

【实验】：在真空中，SACNT-SF在室温下的有效热导率为0.004W/m·K，在2600℃时为0.03 W/m·K。该材料仅为纳米厚且完全可弯曲，能够适应不同形状的表面，形成一种适用于广泛应用的顺应性热绝缘材料。