In this work, carbon nanotube (CNT) based nanocomposites with high mass fraction are proposed by in-situ bridging carbon matrix into CNT paper through optimized chemical vapor infiltration (CVI). Nanoinfiltration behavior of CNTs is basically investigated under the CVI process. The contact between each CNT can be strengthened and the conductive pathways can be established, resulting in the better mechanical and electrical properties. Compared with the pristine CNT paper, the CNT/C composite after pyrolysis process confirms a remarkable advance in tensile strength (up to 310 ± 13 MPa) and Young's modulus (up to 2.4 ± 0.1 GPa). Besides, a notable feature of electrical conductivity also shows an improvement up to 8.5 S/cm, which can be attributed to the mass fraction of CNT (41 wt%) breaking the limits of percolation thresholds and the efficient densification of this sample to establish the conductive pathways. This study has a broad application in the development of the multi-functional electrical and engineering materials.

在这项工作中，通过优化化学气相渗透（CVI）将碳基质原位桥接到CNT纸中，提出了一种具有高质量分数的基于碳纳米管（CNT）的纳米复合材料。碳纳米管的纳米渗透行为基本上是在CVI工艺下研究的。可以加强每个CNT之间的接触，并可以建立导电路径，从而获得更好的机械和电气性能。与原始CNT纸相比，热解工艺后的CNT / C复合材料证实了拉伸强度（高达310±13 MPa）和杨氏模量（高达2.4±0.1 GPa）的显着提高。此外，电导率的显着特征还显示了高达8.5 S / cm的改善，这可以归因于CNT的质量分数（41 wt％）超过了渗滤阈值的极限，并且该样品的有效致密化建立了导电路径。该研究在多功能电气和工程材料的开发中具有广泛的应用。