Improving the mechanical properties and thermal conductivity of mesophase-pitch-based carbon fibers by controlling the temperature in industrial spinning equipment

YE Gao-ming; SHI Kui; WU Huang; HUANG Dong; YE Chong; OUYANG Ting; ZHU Shi-peng; FAN Zhen; LIU Hong-bo; LIU Jin-shui

doi:10.1016/S1872-5805(24)60826-7

Volume 39 Issue 2

Apr. 2024

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Article Navigation > New Carbon Mater. > 2024 > 39(2): 334-344

YE Gao-ming, SHI Kui, WU Huang, HUANG Dong, YE Chong, OUYANG Ting, ZHU Shi-peng, FAN Zhen, LIU Hong-bo, LIU Jin-shui. Improving the mechanical properties and thermal conductivity of mesophase-pitch-based carbon fibers by controlling the temperature in industrial spinning equipment. New Carbon Mater., 2024, 39(2): 334-344. doi: 10.1016/S1872-5805(24)60826-7

Citation:

YE Gao-ming, SHI Kui, WU Huang, HUANG Dong, YE Chong, OUYANG Ting, ZHU Shi-peng, FAN Zhen, LIU Hong-bo, LIU Jin-shui. Improving the mechanical properties and thermal conductivity of mesophase-pitch-based carbon fibers by controlling the temperature in industrial spinning equipment. New Carbon Mater., 2024, 39(2): 334-344. doi: 10.1016/S1872-5805(24)60826-7

Citation:

YE Gao-ming, SHI Kui, WU Huang, HUANG Dong, YE Chong, OUYANG Ting, ZHU Shi-peng, FAN Zhen, LIU Hong-bo, LIU Jin-shui. Improving the mechanical properties and thermal conductivity of mesophase-pitch-based carbon fibers by controlling the temperature in industrial spinning equipment. New Carbon Mater., 2024, 39(2): 334-344. doi: 10.1016/S1872-5805(24)60826-7

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Improving the mechanical properties and thermal conductivity of mesophase-pitch-based carbon fibers by controlling the temperature in industrial spinning equipment

doi: 10.1016/S1872-5805(24)60826-7

YE Gao-ming^{1, #
,},
SHI Kui^1
,,
WU Huang¹,
HUANG Dong^{1, 2},
YE Chong^{1, 2, 4
,
,},
OUYANG Ting¹,
ZHU Shi-peng^{3
,
,},
FAN Zhen³,
LIU Hong-bo¹,
LIU Jin-shui^{1, 2, 4
,
,}

1.
College of Materials Science and Engineering, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
2.
Hunan Province Engineering Research Center for High Performance Pitch-based Carbon Materials, Hunan Toyi Carbon Material Technology Co., Ltd., Changsha 410000, China
3.
Key Laboratory of Advanced Functional Composite Materials, Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China
4.
State Key Laboratory of Advanced Design and Manufacturing for vehicle body, Hunan University, Changsha 410082, China

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Author Bio:
^†叶高明和石奎为共同第一作者
Corresponding author: YE Chong, PH.D, Professor. E-mail: yec@hnu.edu.cn; ZHU Shi-peng, Ph.D, Professor.E-mail: carbonfiber703@163.com; LIU Jin-shui, Ph.D, Professor. E-mail: Jsliu@hnu.edu.cn
Received Date: 2023-08-21
Accepted Date: 2023-11-20
Rev Recd Date: 2023-11-03

Available Online: 2023-11-23

Publish Date: 2024-04-20

Abstract

Abstract

Mesophase-pitch-based carbon fibers (MPCFs) were prepared using industrial equipment with a constant extrusion rate of pitch while controlling the spinning temperature. The influence of spinning temperature on their microstructures, mechanical properties and thermal conductivities was investigated. SEM images of the fractured surface of MPCFs show that the graphite layers have a radiating structure at all spinning temperatures, but change from the fine-and-folded to the large-and-flat morphology when increasing the spinning temperature from 309 to 320 ^oC . At the same time the thermal conductivity and tensile strength of the MPCFs respectively increase from 704 W·m⁻¹·K⁻¹ and 2.16 GPa at 309 ^oC to 1 078 W·m⁻¹·K⁻¹ and 3.23 GPa at 320 ^oC. The lower viscosity and the weaker die-swell effect of mesophase pitch at the outlets of the spinnerets at the higher spinning temperature contribute to the improved orientation of mesophase pitch molecules in the pitch fibers, which improves the crystallite size and orientation of the MPCFs.
- Mesophase pitch,
- Spinning temperature,
- Carbon fiber,
- High thermal conductivity,
- Mechanical properties

#These authors contributed equally to this work.

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References(38)

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