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Enhancing the thermal conductivity of polyacrylonitrile- and pitch-based carbon fibers by grafting carbon nanotubes on them |
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| Authors: | Kimiyoshi Naito Jenn-Ming Yang Yutaka Kagawa |
| Affiliation: | a National Institute for Materials Science, Hybrid Materials Center, Composite Materials Group, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan b University of California Los Angeles, Department of Materials Science and Engineering, Los Angeles, CA 90095-1595, USA c The University of Tokyo, Research Center for Advanced Science and Technology, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan |
| Abstract: | The thermal conductivities of ultrahigh tensile strength polyacrylonitrile (PAN)-based (T1000GB) and ultrahigh modulus pitch-based (K13D) carbon fibers with carbon nanotubes (CNTs) grown on them using chemical vapor deposition were measured using a thermal diffusivity meter. The thermal conductivities of the resulting hybrid materials were calculated to be 18.6 ± 1.7 and 965.6 ± 30.0 W/m K for T1000GB and K13D, respectively, while the respective original conductivities were 12.6 ± 1.0 and 745.5 ± 16.0 W/m K. The results clearly show that the CNTs grafting improves the thermal conductivities of both types of fiber. |
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