The structure and properties of ribbon-shaped carbon fibers with high orientation |
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| Affiliation: | 1. Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, China;2. Institute for Materials Research, University of Leeds, Leeds LS2 9JT, United Kingdom;3. SARChI Chair of Carbon Technology and Materials, Institute of Applied Materials, University of Pretoria, Pretoria 0002, South Africa;4. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;1. Textile Engineering Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;2. ATMT Research Institute, AmirKabir University of Technology, Tehran, Iran;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, China;3. Institute for Materials Research, University of Leeds, Leeds LS2 9JT, United Kingdom;1. Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;2. Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan;3. Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology, Gajeong-ro Yuseong-gu, Daejeon, 34114, South Korea;4. University of Science and Technology, Gajeong-ro Yuseong-gu, Daejeon, 34113, South Korea;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei 430081, PR China;2. The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials, Wuhan University of Science and Technology, Wuhan, Hubei 430081, PR China;3. The Research Center for Advanced Carbon Materials, Hunan University, Changsha, Hunan 410082, PR China;4. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester, M13 9PL, UK;1. Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology, Tianjin Polytechnic University, Tianjin, 300387, China;2. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China |
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| Abstract: | Using a naphthalene-derived mesophase pitch as a starting material, highly oriented ribbon-shaped carbon fibers with a smooth and flat surface were prepared by melt-spinning, oxidative stabilization, carbonization, and graphitization. The preferred orientation, morphology, and microstructure, as well as physical properties, of the ribbon-shaped carbon fibers were characterized. The results show that, the ribbon-shaped fibers possessed uniform shrinkage upon heat treatment, thereby avoiding shrinkage cracking commonly observed in round-shaped fibers. As heat treatment progressed, the ribbon-shaped graphite fibers displayed larger crystallite sizes and higher orientation of graphene layers along the main surface of the ribbon-shaped fiber in comparison with corresponding round-shaped fibers. The stability of the ribbon-shaped graphite fibers towards thermal oxidation was significantly higher than that of K-1100 graphite fibers. The longitudinal thermal conductivity of the ribbon fibers increased, and electrical resistivity decreased, with increasing the heat treatment temperatures. The longitudinal electrical resistivity and the calculated thermal conductivity of the ribbon-shaped fibers graphitized at 3000 °C are about 1.1 μΩ m and above 1100 W/m K at room temperature, respectively. The tensile strength and Young’s modulus of these fibers approach 2.53 and 842 GPa, respectively. |
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