新型炭材料（中英文）2024，Vol.39Issue(2)：334-344,11.DOI:10.1016/S1872-5805(24)60826-7
基于工程化设备通过调控纺丝温度提高中间相沥青炭纤维力学和导热性能
Improving the mechanical properties and thermal conductivity of mesophase-pitch-based carbon fibers by controlling the temperature in industrial spinning equipment
摘要
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 prop-erties 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 increas-ing the spinning temperature from 309 to 320 ℃.At the same time the thermal conductivity and tensile strength of the MPCFs re-spectively increase from 704 W-m-1·K-1and 2.16 GPa at 309 ℃ to 1 078 W·m-1-K-1 and 3.23 GPa at 320 ℃.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.关键词
中间相沥青/纺丝温度/炭纤维/高热导率/力学性能Key words
Mesophase pitch/Spinning temperature/Carbon fiber/High thermal conductivity/Mechanical properties分类
通用工业技术引用本文复制引用
叶高明,刘金水,石奎,吴晃,黄东,叶崇,欧阳婷,朱世鹏,樊桢,刘洪波..基于工程化设备通过调控纺丝温度提高中间相沥青炭纤维力学和导热性能[J].新型炭材料（中英文）,2024,39(2):334-344,11.基金项目
This work was supported by the National Natur-al Science Foundation of China(52202037,52002104,U21B2067),the Innovative Construction Province of Hunan(2021GK1140),the Scientific and Technolo-gical Talent Lifting Project for Hunan Province(2022TJ-N11),and the Science and Technology Planning Project of Changsha(kq2102005). 国家自然科学基金(52202037、52002104、U21B2067) （52202037,52002104,U21B2067）
湖南创新型省份建设专项(2021GK1140) （2021GK1140）
湖南省科技人才托举工程(2022-TJ-N11) （2022-TJ-N11）
长沙市科技计划项目(kq2102005). （kq2102005）
