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Improvement of Mechanical Properties of Softwood Lignin-Based Carbon Fibers

机译：改善软木木质素基碳纤维的机械性能

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摘要

PEG-lignin fibers obtained by a solvolysis pulping of Japanese cedar with polyethylene glycol (PEG) 400 were successfully converted into defective-free, infusible fibers as a precursor for carbon fibers (CFs) by chemical curing followed by oxidative thermostabilization. The curing was performed by immersing PEG-lignin fibers in an aqueous mixed solution of hexamethylenetetramine (60 g/L) and hydrochloric acid (3 M) at 85℃ for 1 h, resulting in the formation of crosslinkages between lignin molecules through methylene groups. These cured fibers were completely thermostabilized upon heating up to 250℃ at a heating rate of'2℃/min under an air atmosphere. Finally, the thermostabilized fibers were carbonized to yield CFs, which showed about 1.5 times the tensile strength of our CFs previously prepared.
机译：通过将日本雪松与聚乙二醇（PEG）400溶剂化制浆获得的PEG-木质素纤维已通过化学固化和氧化热稳定作用成功转化为无缺陷的不溶性纤维，作为碳纤维（CFs）的前体。通过将PEG-木质素纤维浸入六亚甲基四胺（60 g / L）和盐酸（3 M）的混合水溶液中于85℃下浸泡1 h，从而在木质素分子之间通过亚甲基形成交联。这些固化的纤维在空气气氛下以2℃/ min的升温速率加热到250℃时就完全热稳定。最后，将热稳定的纤维碳化以生产CF，其CF拉伸强度约为我们先前制备的CF的1.5倍。

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  • 来源
    《Journal of Wood Chemistry and Technology》 |2014年第2期|111-121|共11页
  • 作者

    JIAN LIN; KEIICHI KODA; SATOSHI KUBO; TATSUHIKO YAMADA; MAKIKO ENOKI; YASUMITSU URAKI;

  • 作者单位

    Graduate School of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan;

    Research Faculty of Agriculture, Hokkaido University, Hokkaido, N-9, W-9, Kita-ku, Sapporo 060-8589, Japan;

    Department of Biomass Chemistry, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, Japan;

    Department of Biomass Chemistry, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, Japan;

    Department of Marine Science, Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan;

    Research Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Softwood lignin; chemical curing; hexamethylenetetramine; carbon fibers; mechanical properties;

    机译：软木木质素;化学固化;六亚甲基四胺;碳纤维机械性能;

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