A thin layer of pyrolytic carbon (PyC) was deposited on a carbon nanotube paper (CNP) by chemical vapor deposition from methane to improve its structural stability while maintaining its excellent mechanical and thermal conductivity performance. The resulting material consisted of layers of PyC carbon on the outer surfaces, a layer of bare CNTs in the center, and layers of CNTs infiltrated with PyC between the outer and inner layers. The resulting sandwich material could be cut into any size without breaking the surrounding material. The CNTs in the center layer were stretched after the CNP was bent 500 times around a cylindrical die, leading to an increase of tensile strength from 8.58 to 11.41 MPa. The outer PyC layers and the PyC-infiltrated layers retained their integrity. The thermal diffusivity and heat-dissipation capacity of the sandwich paper remain almost the same before and after bending, which is attributed to the undamaged CNTs and PyC layers. This paper has potential applications as a lightweight and flexible heat-dissipation material at high temperatures.

通过从甲烷进行化学气相沉积，在碳纳米管纸（CNP）上沉积了一层热解碳（PyC）薄层，以改善其结构稳定性，同时保持其出色的机械和导热性能。所得材料由外表面上的PyC碳层，中心的裸露CNT层以及在外层和内层之间渗透有PyC的CNT层组成。可以将所得的夹心材料切成任何尺寸而不会破坏周围的材料。在将CNP绕圆柱模弯曲500次后，拉伸中心层中的CNT，从而使拉伸强度从8.58 MPa增加到11.41 MPa。外部PyC层和PyC浸润层保持其完整性。三明治纸弯曲之前和之后的热扩散率和散热能力几乎保持不变，这归因于未损坏的CNT和PyC层。本文作为一种轻质，柔性的高温散热材料，具有潜在的应用前景。