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Surface structural evolvement in the conversion of polyacrylonitrile precursors to carbon fibers

机译：聚丙烯腈前体向碳纤维转化的表面结构演变

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摘要

Surface structural evolvement in the conversion of polyacrylonitrile (PAN) precursors to carbon fibers was investigated through scanning electron microscopy ( SEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). SEM results showed that the characteristic striated topography of PAN precursors resulted from the wet spinning process could pass down to carbon fibers. The fiber diameter gradually decreased from 11.3 mu m to 5.5 mu m and the corresponding density increased from 1.18 g/cm(3) to 1.80 g/cm(3) in the conversion of PAN precursors to carbon fibers. The ridges and grooves monitored by AFM became much more well-defined after the thermo-oxidation. However, the original longitudinal grooves were destroyed and both the depth and the width of longitudinal grooves decreased after the carbonization. XPS results revealed that carbon, nitrogen, oxygen and silicon were the governing elements on the fiber surface. The -C-C functional groups was the dominant groups and the relative contents of -C=O and -COO groups gradually increased in the process of thermo-oxidation and carbonization. (C) 2014 Elsevier B.V. All rights reserved.
机译：通过扫描电子显微镜（SEM），原子力显微镜（AFM）和X射线光电子能谱（XPS）研究了聚丙烯腈（PAN）前体向碳纤维转化过程中的表面结构演变。扫描电镜结果表明，湿法纺丝工艺产生的PAN前体的特征条纹形貌可能会向下传播至碳纤维。 PAN前体向碳纤维的转化过程中，纤维直径从11.3μm逐渐减小到5.5μm，相应的密度从1.18 g / cm（3）增加到1.80 g / cm（3）。在热氧化之后，由AFM监控的脊和槽变得更加清晰。但是，碳化后原始的纵向槽被破坏，纵向槽的深度和宽度均减小。 XPS结果表明，碳，氮，氧和硅是纤维表面的主要元素。 -C-C官能团为主要基团，在热氧化和碳化过程中，-C = O和-COO基团的相对含量逐渐增加。 （C）2014 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2015年第1期|246-252|共7页
  • 作者

    Qian Xin; Zou Ruifen; OuYang Qin; Wang Xuefei; Zhang Yonggang;

  • 作者单位

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Special Fiber Dept, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315021, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Special Fiber Dept, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315021, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Special Fiber Dept, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315021, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Special Fiber Dept, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315021, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Special Fiber Dept, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315021, Zhejiang, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Surface; Thermo-oxidation; Carbonization; Carbon fiber;

    机译：表面;热氧化;碳化;碳纤维;

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