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<p>Developing high-performance bio-based fibres is highly desirable for improving the sustainability of materials. Cellulose is one of the most abundant bio-derived feedstocks to fabricate such materials. However, the fabrication of high-strength macro cellulose fibres is challenging due to the difficulty in obtaining ordered packing of cellulose molecular chains and nanocrystals in the macro-fibres. Here we develop a draw spinning/de-acetylation method to prepare cellulose fibres with highly ordered molecular packing that incorporates high strength in the obtained fibres. Specifically, a fibre draw spun from well-dispersed cellulose triacetate solution was de-acetylated to generate cellulose fibres, which were then twisted to spirally align the molecular chains. The resulting fibres exhibited mechanical strength of 3.08 GPa and toughness of 215.1 MJ m<sup>−</sup><sup>3</sup>, much higher than existing fibre materials. This work paves the way to obtaining high-performance bio-based fibres.</p>

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High-strength cellulose fibres enabled by molecular packing

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Kaiqing Yu,
  • Chao Li,
  • Wenhui Gu,
  • Meilin Wang,
  • Jiatian Li,
  • Kai Wen,
  • Yicheng Xiao,
  • Shiyong Liu,
  • Yan Liang,
  • Wenjin Guo,
  • Weiqiang Zhao,
  • Jie Bai,
  • Dongdong Ye,
  • Yutian Zhu,
  • Meifang Zhu,
  • Xiang Zhou,
  • Zunfeng Liu

摘要

Developing high-performance bio-based fibres is highly desirable for improving the sustainability of materials. Cellulose is one of the most abundant bio-derived feedstocks to fabricate such materials. However, the fabrication of high-strength macro cellulose fibres is challenging due to the difficulty in obtaining ordered packing of cellulose molecular chains and nanocrystals in the macro-fibres. Here we develop a draw spinning/de-acetylation method to prepare cellulose fibres with highly ordered molecular packing that incorporates high strength in the obtained fibres. Specifically, a fibre draw spun from well-dispersed cellulose triacetate solution was de-acetylated to generate cellulose fibres, which were then twisted to spirally align the molecular chains. The resulting fibres exhibited mechanical strength of 3.08 GPa and toughness of 215.1 MJ m−3, much higher than existing fibre materials. This work paves the way to obtaining high-performance bio-based fibres.