Nanoinfiltration behavior of carbon nanotube based nanocomposites with enhanced mechanical and electrical properties
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第12期
论文作者：Mengmeng Wang Jinshan Yang Xiao You Chunjing Liao Jingyi Yan Jing Ruan Shaoming Dong
摘 要：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.
Mengmeng Wang1,2,3，Jinshan Yang1,2，Xiao You1,2,3，Chunjing Liao2，Jingyi Yan1,2,3，Jing Ruan1,2,4，Shaoming Dong1,5,2
1. State Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences3. University of Chinese Academy of Sciences4. Shanghai Tech University5. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences
摘 要：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.
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