纺丝工艺对带形中间相沥青基石墨纤维取向结构及热导率的影响

doi:10.3724/SP.J.1077.2010.00989

无机材料学报 ›› 2010, Vol. 25 ›› Issue (9): 989-993.DOI: 10.3724/SP.J.1077.2010.00989

纺丝工艺对带形中间相沥青基石墨纤维取向结构及热导率的影响

马兆昆¹, 刘朗², 刘杰¹

(1. 北京化工大学材料科学与工程学院, 北京100029; 2. 中国科学院山西煤炭化学研究所, 太原030001)

收稿日期:2009-12-11 修回日期:2010-04-07 出版日期:2010-09-20 网络出版日期:2010-08-25
基金资助:
国家自然科学重点基金(50333070)

Effect of Spinning Process on the Oriented Structure and Thermal Conductivity of the Mesophase Pitch-based Graphite Fiber

MA Zhao-Kun¹, LIU Lang², LIU Jie¹

(1. Materials Science and Engineering College, Beijing University of Chemical Technology, Beijing 100029, China; 2. Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001,China)

Received:2009-12-11 Revised:2010-04-07 Published:2010-09-20 Online:2010-08-25

摘要/Abstract

摘要：

中间相沥青经熔融纺丝、不熔化、炭化石墨化制备了带状高导热石墨纤维. 鉴于纺丝工艺对中间相分子的轴向和截面取向度的重要影响, 研究了喷丝板结构和纺丝温度对中间相沥青基石墨纤维(MPGF)的取向结构和传导性能的影响. 结果表明: 对矩形截面喷丝的微孔, 在最佳的纺丝温度下, 截面长宽比越大,初生纤维内分子的取向度越高, MPGF的传导性越好. 当长宽比和纺丝温度分别为9:1和305℃时, MPGF的取向度较高(97.8%), 热导率达到894 W/(m·K); 长宽比继续增大时, 更高的剪切作用致使纤维内应力较大, 纺丝稳定性变差.

关键词: 中间相沥青基石墨纤维, 取向结构, 热导率

Abstract:

High thermal conductive mesophase pitch-based graphite fiber was prepared through melt spinning, stabilization, carbonization and graphitization. It was proved that the spinning process was crucial for the degree of preferred orientation of mesophase molecular along the fiber axis. Effect of spinneret structure with rectangular section and spinning temperature on the preferred orientation degree and conductivity properties of MPGF were investigated. The experimental results demonstrate that larger aspect ratio of spinneret section facilitate higher preferred orientation degree of molecular and conductivity. At 9:1 of the aspect ratio and 305℃ of spinning temperature, the orientation degree of graphite crystal with respect to fiber axis and thermal conductivity of MPGF reached 97.8% and 894 W/(m·K), respectively. Furthermore, the mesophase pitch still?exhibite good spinnability. With increasing the aspect ratio of rectangular section of spinneret, larger shear action leads to higher internal stress of fiber, and resultes in poor spinning stability.

Key words: mesophas pitch-based carbon fiber, oriented structure, thermal conductivity

中图分类号:

TB332

马兆昆, 刘朗, 刘杰. 纺丝工艺对带形中间相沥青基石墨纤维取向结构及热导率的影响[J]. 无机材料学报, 2010, 25(9): 989-993.

MA Zhao-Kun, LIU Lang, LIU Jie. Effect of Spinning Process on the Oriented Structure and Thermal Conductivity of the Mesophase Pitch-based Graphite Fiber[J]. Journal of Inorganic Materials, 2010, 25(9): 989-993.

参考文献

[1] Snead L L, Balden M, Causey R A, et al. High thermal conductivity of graphite fiber silicon carbide composites for fusion reactor application. J. Nucl. Mater., 2002, 307-311: 1200-1204.
[2] 李崇俊, 马伯信, 金志浩. 炭/炭复合材料的新进展. 材料科学与工程, 2000, 18(3): 135-138.
[3] Enweani B N, Davis J, Haasz A A. Thermal diffusivity/ conductivity of doped graphite. J. Nucl. Mater., 1995, 224(3): 245-253.
[4] Wang Moran, Kang Qinjun, Pan Ning. Thermal conductivity enhancement of carbon fiber composites. Applied Thermal Engineering, 2009, 2(2/3): 418-421.
[5] Li Tong-Qi, Xu Zheng-Hui, Hu Zi-Jun, et al. Application of a high thermal conductivity C/C composite in a heat-redistribution thermal protection system. Carbon, 2010, 48(3): 924-925.
[6] 马兆昆, 史景利, 刘朗, 等(MA Zhao-Kun, et al). 中间相沥青纤维制备高导热炭材料的研究. 无机材料学报(Journal of Inorganic Materials), 2006, 21(5): 1167-1172.
[7] Edie D D. The effect of processing on the structure and properties of carbon fibers. Carbon, 1998, 36(4): 345-362.
[8] Mochida I, Yoon S H, Takano N, et al. Microstructure of mesophase pitch-based carbon fiber and its control. Carbon, 1996, 34(8): 941-956.
[9] Edie D D, Fain C C, Robinson K E, et al. Ribbon-shape carbon fibers for thermal management. Carbon, 1993, 31(6): 941-949.
[10] Mchugh J J, Edie D D. The orientation of mesophase pitch during fully developed channel flow. Carbon, 1996, 34(11): 1315-1322.
[11] Zhang X, Fujiwara S, Fujii M. Measurement of thermal conductivity and electrical resistivity of a single carbon fiber. Inter. J. Thermophys, 2000, 21(4): 965-980.
[12] 王浩静, 王红飞, 李东风, 等. 石墨化温度对炭纤维微观结构及其力学性能的影响. 新型炭材料, 2005, 20(2): 157-163.
[13] Qiu H, Song Y, Liu L, et al. Thermal conductivity and microstructure of Ti-doped graphite. Carbon, 2003, 41(5): 973-978.

[1]	付师, 杨增朝, 李宏华, 王良, 李江涛. 复合烧结助剂对Si₃N₄陶瓷力学性能和热导率的影响[J]. 无机材料学报, 2022, 37(9): 947-953.
[2]	胡佳军, 王凯, 侯鑫广, 杨婷, 夏鸿雁. 熔盐法合成高导热磷化硼及其热管理性能研究[J]. 无机材料学报, 2022, 37(9): 933-940.
[3]	王鹏将, 康慧君, 杨雄, 刘颖, 程成, 王同敏. 熵调控抑制ZrNiSn基half-Heusler热电材料的晶格热导率[J]. 无机材料学报, 2022, 37(7): 717-723.
[4]	阮景, 杨金山, 闫静怡, 游潇, 王萌萌, 胡建宝, 张翔宇, 丁玉生, 董绍明. 碳化硅纳米线增强多孔碳化硅陶瓷基复合材料的制备[J]. 无机材料学报, 2022, 37(4): 459-466.
[5]	娄许诺, 邓后权, 李爽, 张青堂, 熊文杰, 唐国栋. Ge掺杂MnTe材料的热电输运性能[J]. 无机材料学报, 2022, 37(2): 209-214.
[6]	王为得, 陈寰贝, 李世帅, 姚冬旭, 左开慧, 曾宇平. 以YbH₂-MgO体系为烧结助剂制备高热导率高强度氮化硅陶瓷[J]. 无机材料学报, 2021, 36(9): 959-966.
[7]	桑玮玮, 张红松, 陈华辉, 温斌, 李新春. (Sm_0.2Gd_0.2Dy_0.2Y_0.2Yb_0.2)₃TaO₇高熵陶瓷的制备及热物理性能[J]. 无机材料学报, 2021, 36(4): 405-410.
[8]	牟庭海, 许文涛, 凌军荣, 董天文, 秦梓轩, 周有福. 微波烧结制备ZrO₂-AlN复合陶瓷的微观结构与性能研究[J]. 无机材料学报, 2021, 36(11): 1231-1236.
[9]	邱小小,周细应,傅赟天,孙晓萌,王连军,江莞. Ge_1-_xIn_xTe微观结构对热电性能的影响[J]. 无机材料学报, 2020, 35(8): 916-922.
[10]	周星圆, 柳伟, 张程, 华富强, 张敏, 苏贤礼, 唐新峰. Nb掺杂Mo_1-_xW_xSeTe固溶体的热-电输运性能优化[J]. 无机材料学报, 2020, 35(12): 1373-1379.
[11]	何端鹏,高鸿,张静静,吴杰,刘泊天,王向轲. 氮化铝覆铜板在空间热场下热学性能的模拟仿真及实验验证[J]. 无机材料学报, 2019, 34(9): 947-952.
[12]	马伯乐, 马文, 黄威, 白玉, 贾瑞灵, 董红英. 单相双稀土改性SrZrO₃热障涂层的热物理性能[J]. 无机材料学报, 2019, 34(4): 394-400.
[13]	骆军, 何世洋, 李志立, 李永博, 王风, 张继业. 热电材料高通量实验制备与表征方法[J]. 无机材料学报, 2019, 34(3): 247-259.
[14]	沈家骏, 方腾, 傅铁铮, 忻佳展, 赵新兵, 朱铁军. 热电材料中的晶格热导率[J]. 无机材料学报, 2019, 34(3): 260-268.
[15]	檀小芳, 端思晨, 王泓翔, 吴庆松, 李苗苗, 刘国强, 徐静涛, 谈小建, 邵和助, 蒋俊. 多掺杂协同调控碲化锡热导率和功率因子提升热电性能[J]. 无机材料学报, 2019, 34(3): 335-340.

纺丝工艺对带形中间相沥青基石墨纤维取向结构及热导率的影响

Effect of Spinning Process on the Oriented Structure and Thermal Conductivity of the Mesophase Pitch-based Graphite Fiber

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价