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Bio-cleaning improves the mechanical properties of lignin-based carbon fibers

机译：生物清洁改善了木质素基碳纤维的力学性能

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摘要

Production of carbon fibers (CF) using renewable precursors has gained importance particularly in the last decade to reduce the dependency on conventional petroleum-based precursors. However, pre-treatment of these renewable precursors is still similar to that of conventional ones. Little work is put into greener pre-treatments and their effects on the end products. This work focuses on the use of bio-cleaned lignin as a green precursor to produce CF by electrospinning. Bio-cleaned kraft lignin A (Bio-KLA) and uncleaned kraft lignin A (KLA) were used to explore the effect of bio-cleaning on the diameter and mechanical properties of lignin fibers and CF. The effect of electric field, lignin-to-poly(ethylene oxide) (PEO) ratio and PEO molecular weight (MW) were evaluated by 3(3) factorial design using Design of Experiment (DOE). The electrospinning process parameters were optimized to obtain a balance between high elastic modulus and small fiber diameter. The model predicted optimized conditions were 50 kV m(-1)electric field, 95/5 lignin-to-PEO ratio and 1000 kDa MW of PEO. When compared to KLA, Bio-KLA CFs showed a 2.7-fold increase in elastic modulus, 2-fold increase in tensile strength and 30% decrease in fiber diameter under the same optimum conditions. The results clearly show that bio-cleaning improved the mechanical properties of lignin derived CF.
机译：使用可再生前体的生产碳纤维（CF）尤其在过去十年中获得了重要性，以减少对常规石油基前体的依赖性。然而，预处理这些可再生前体仍然与常规的前体仍然类似。一点工作被投入更环保的预治疗和对最终产品的影响。这项工作侧重于使用生物清洁的木质素作为绿色前体，通过静电纺丝生产CF。生物清洁的牛皮纸Hignin A（Bio-KLA）和未切割的牛皮纸Hignin A（KLA）用于探讨生物清洁对木质素纤维和CF的直径和机械性能的影响。使用实验设计（DOE）的设计评估了电场，木质素 - 氧化物）（PEO）比和PEO分子量（MW）的影响。优化静电纺丝工艺参数，以获得高弹性模量和小纤维直径之间的平衡。所预测的优化条件的模型为50 kV m（-1）电场，95/5木质素 - PEO比和PEO的1000kDa Mw。与KLA相比，Bio-KLA CFS显示出弹性模量的2.7倍，拉伸强度的增加2倍，纤维直径下降30％，在相同的最佳条件下。结果清楚地表明生物清洁改善了木质素衍生的CF的机械性能。

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  • 来源
    《RSC Advances》 |2020年第39期|共13页
  • 作者

    Ghosh Tanushree; Chen Jiawei; Kumar Aloke; Tang Tian; Ayranci Cagri;

  • 作者单位

    Univ Alberta Dept Mech Engn 116 St &

    85 Ave Edmonton AB Canada;

    Univ Alberta Dept Mech Engn 116 St &

    85 Ave Edmonton AB Canada;

    Indian Inst Sci Dept Mech Engn CV Raman Rd Bangalore 560012 Karnataka India;

    Univ Alberta Dept Mech Engn 116 St &

    85 Ave Edmonton AB Canada;

    Univ Alberta Dept Mech Engn 116 St &

    85 Ave Edmonton AB Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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