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Super-Strong and Super-Stiff Chitosan Filaments with Highly Ordered Hierarchical Structure

机译：具有高度有序的等级结构的超强和超硬壳聚糖细丝

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摘要

Currently, the world is facing the problems of the gradual depletion of non-renewable fossil resources and the severe harm of non-degradable plastic waste to the land and marine ecological environment. Because of the rapid increase in the demand for fiber materials, the development of high-performance biomass-based fibers has emerged as an important research topic to reduce the reliance on petroleum-based synthetic fibers. In this study, a novel green wet-spinning strategy is used for the fabrication of super-strong and super-stiff chitosan filaments from an aqueous KOH/urea solution using a two-step drawing process. The highly ordered hierarchical structure of the resulting filaments contributes to their excellent mechanical properties. The tensile strength and Young's modulus of the chitosan filaments are 878 +/- 123 MPa and 44.7 +/- 12.3 GPa, respectively, and these values are comparable to those of spider silk and bacterial cellulose. The chitosan filaments prepared in this study are superior to low-density steel in terms of the specific strength and modulus. The green and scalable strategy proposed in this study will broaden the application range of chitosan filaments in flexible bioelectronics, biomaterials, and textiles.
机译：目前，世界正面临着逐渐消耗不可再生化石资源的问题，以及对土地和海洋生态环境的不可降解塑料废物的严重危害。由于纤维材料需求的快速增加，高性能生物质基纤维的发展已成为减少对石油基合成纤维依赖的重要研究课题。在该研究中，新颖的绿色湿纺策略用于使用双层拉伸过程从KOH /尿素溶液中制造超强和超刚性的壳聚糖长丝。所得长丝的高度有序的等级结构有助于其优异的机械性能。壳聚糖长丝的拉伸强度和杨氏模量分别为878 +/- 123MPa和44.7 +/- 12.3GPa，这些值与蜘蛛丝和细菌纤维素相当。本研究中制备的壳聚糖长丝在特定强度和模量方面优于低密度钢。本研究中提出的绿色和可扩展策略将扩大含有柔性生物电体，生物材料和纺织品的壳聚糖长丝的应用范围。

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  • 来源
    《Advanced Functional Materials》 |2021年第38期|2104368.1-2104368.12|共12页
  • 作者

    Chen Yijun; Zhang Qing; Zhong Yi; Wei Pingdong; Yu Xuejie; Huang Junchao; Cai Jie;

  • 作者单位

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Coll Chem & Mol Sci Hubei Engn Ctr Nat Polymers Based Med Mat Wuhan 430072 Hubei Peoples R China|Wuhan Univ Res Inst Shenzhen Shenzhen 518057 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chitosan; filaments; hierarchical structure; mechanical properties;

    机译：壳聚糖;细丝;层次结构;机械性能;

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