Laser induced graphitization of PAN-based carbon fibers

被引:34
作者
Sha, Yang [1 ,2 ]
Yang, Weimin [1 ,3 ]
Li, Sanyang [3 ]
Yao, Liangbo [3 ]
Li, Haoyi [3 ]
Cheng, Lisheng [3 ]
Yan, Hua [1 ,3 ]
Cao, Weiyu [1 ,2 ]
Tan, Jing [1 ,3 ]
机构
[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Coll Mat Sci & Engn, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Key Lab, Educ Minist Carbon Fibre & Funct Polymer, Beijing 100029, Peoples R China
[3] Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China
来源
RSC ADVANCES | 2018年 / 8卷 / 21期
基金
中国国家自然科学基金;
关键词
GAMMA-RAY IRRADIATION; MECHANICAL-PROPERTIES; ION IRRADIATION; STRUCTURAL HETEROGENEITY; HEAT-TREATMENT; RAMAN-SPECTRA; GRAPHITE; PLASMA; CARBONIZATION; MICROSTRUCTURE;
D O I
10.1039/c8ra00497h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Laser induced graphitization of polyacrylonitrile-based carbon fibers (CFs) was carried out in a self-designed furnace with a CO2 laser source. The microstructures combined with mechanical properties of the irradiated CFs were measured by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), wide-angle X-ray diffraction (WAXD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM) and single filament tensile test, respectively. The results exhibited that the hierarchical structures of CFs showed different responses to the CO2 laser. After laser graphitization, the surface and cross-section structure were characterized by Raman spectroscopy. As the power density increased, a profound increase of graphitization degree happened and obvious skin-core structures were observed. Furthermore, the results of XPS measurements indicated that the irradiated CFs showed more conjugated structures. For crystallite structure, the interlayer spacing of the (002) lattice decreased and the thickness of crystallite increased after graphitization. The size of the (002) lattice parallel to the fiber axis changed slightly. The surface morphology was also investigated by SEM, sheet structures and particles could be observed on the surface of CFs. This was attributed to fast energy addition of laser and the characteristics of the material. Further HRTEM investigation revealed that the sheet structure is multilayered graphene. The Young's modulus of irradiated fibers showed obvious improvements compared to that of as-received ones.
引用
收藏
页码:11543 / 11550
页数:8
相关论文
共 36 条
[1]   Characterizing various types of defects in nuclear graphite using Raman scattering: Heat treatment, ion irradiation and polishing [J].
Ammar, M. R. ;
Galy, N. ;
Rouzaud, J. N. ;
Toulhoat, N. ;
Vaudey, C. E. ;
Simon, P. ;
Moncoffre, N. .
CARBON, 2015, 95 :364-373
[2]  
[Anonymous], [No title captured]
[3]   Influence of diameter in the Raman spectra of aligned multi-walled carbon nanotubes [J].
Antunes, E. F. ;
Lobo, A. O. ;
Corat, E. J. ;
Trava-Airoldi, V. J. .
CARBON, 2007, 45 (05) :913-921
[4]   ELECTRON-MICROSCOPE STUDIES OF STRUCTURAL HETEROGENEITY IN PAN-BASED CARBON-FIBERS [J].
BENNETT, SC ;
JOHNSON, DJ .
CARBON, 1979, 17 (01) :25-39
[5]   The characterization of activated carbons with oxygen and nitrogen surface groups [J].
Biniak, S ;
Szymanski, G ;
Siedlewski, J ;
Swiatkowski, A .
CARBON, 1997, 35 (12) :1799-1810
[8]   A Raman - HRTEM study of the carbonization of wood: A new Raman-based paleothermometer dedicated to archaeometry [J].
Deldicque, Damien ;
Rouzaud, Jean-Noel ;
Velde, Bruce .
CARBON, 2016, 102 :319-329
[9]   SURFACE-ENERGY AND MECHANICAL-PROPERTIES OF PLASMA-MODIFIED CARBON-FIBERS [J].
DILSIZ, N ;
ERINC, NK ;
BAYRAMLI, E ;
AKOVALI, G .
CARBON, 1995, 33 (06) :853-858
[10]   The effect of processing on the structure and properties of carbon fibers [J].
Edie, DD .
CARBON, 1998, 36 (04) :345-362