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TEM study on the inhomogeneity of oxygen diffusion distances in single polyacrylonitrile-based carbon fibers
Guo, Xinshuang; Zhang, Kexiang; Cheng, Jianxiang; He, Hui; He, Lianlong; Xu, Jian
2019-05-01
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume475Pages:571-576
AbstractAccurate measurement of oxygen diffusion distances (ODDs) is important but difficult in the production of polyacrylonitrile (PAN)-based carbon fibers. Traditionally, the ODDs were deemed to be homogeneous in a single fiber and paid no attention. Herein, the skin widths of carbon fibers with the skin-core structure were proposed to assess the ODDs, and the ODDs were investigated by transmission electron microscopy. The ODDs were first found to be homogeneous for the commercially noncircular carbon fibers, while they were uniform in every direction for the circular single carbon fibers. The inhomogeneity of the ODDs was unrelated to the surface and cross-sectional morphologies of carbon fibers, and it was considered to result from the density difference at the edge of a single PAN precursor fiber. These findings not only deepen the understanding of the effect of the PAN precursor fiber shapes on the oxygen diffusion during stabilization, but also provide an opportunity for optimizing the stabilization conditions according to the density difference at the edges of single PAN precursor fibers.
KeywordPAN-based carbon fiber Skin width Oxygen diffusion distances Inhomogeneity TEM
Indexed BySCI
Language英语
WOS IDWOS:000458482100067
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81158
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Guo, Xinshuang,Zhang, Kexiang,Cheng, Jianxiang,et al. TEM study on the inhomogeneity of oxygen diffusion distances in single polyacrylonitrile-based carbon fibers[J]. APPLIED SURFACE SCIENCE,2019,475:571-576.
APA Guo, Xinshuang,Zhang, Kexiang,Cheng, Jianxiang,He, Hui,He, Lianlong,&Xu, Jian.(2019).TEM study on the inhomogeneity of oxygen diffusion distances in single polyacrylonitrile-based carbon fibers.APPLIED SURFACE SCIENCE,475,571-576.
MLA Guo, Xinshuang,et al."TEM study on the inhomogeneity of oxygen diffusion distances in single polyacrylonitrile-based carbon fibers".APPLIED SURFACE SCIENCE 475(2019):571-576.
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