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Covalently bridging graphene edges for improving mechanical and electrical properties of fibers

Author

Listed:
  • Ling Ding

    (Soochow University)

  • Tianqi Xu

    (Soochow University
    Beijing University of Chemical Technology)

  • Jiawen Zhang

    (Soochow University
    Beijing University of Chemical Technology)

  • Jinpeng Ji

    (Soochow University)

  • Zhaotao Song

    (Soochow University
    Beijing University of Chemical Technology)

  • Yanan Zhang

    (Soochow University)

  • Yijun Xu

    (Chinese Academy of Sciences)

  • Tong Liu

    (Chinese Academy of Sciences)

  • Yang Liu

    (Chinese Academy of Sciences)

  • Zihan Zhang

    (National Institute for Materials Science)

  • Wenbin Gong

    (Xuzhou University of Technology)

  • Yunong Wang

    (Soochow University)

  • Zhenzhong Shi

    (Soochow University)

  • Renzhi Ma

    (National Institute for Materials Science)

  • Jianxin Geng

    (Beijing University of Chemical Technology
    Tiangong University)

  • Huynh Thien Ngo

    (National Institute for Materials Science)

  • Fengxia Geng

    (Soochow University
    Beijing Graphene Institute)

  • Zhongfan Liu

    (Beijing Graphene Institute
    Peking University)

Abstract

Assembling graphene sheets into macroscopic fibers with graphitic layers uniaxially aligned along the fiber axis is of both fundamental and technological importance. However, the optimal performance of graphene-based fibers has been far lower than what is expected based on the properties of individual graphene. Here we show that both mechanical properties and electrical conductivity of graphene-based fibers can be significantly improved if bridges are created between graphene edges through covalent conjugating aromatic amide bonds. The improved electrical conductivity is likely due to extended electron conjugation over the aromatic amide bridged graphene sheets. The larger sheets also result in improved π-π stacking, which, along with the robust aromatic amide linkage, provides high mechanical strength. In our experiments, graphene edges were bridged using the established wet-spinning technique in the presence of an aromatic amine linker, which selectively reacts to carboxyl groups at the graphene edge sites. This technique is already industrial and can be easily upscaled. Our methodology thus paves the way to the fabrication of high-performance macroscopic graphene fibers under optimal techno-economic and ecological conditions.

Suggested Citation

  • Ling Ding & Tianqi Xu & Jiawen Zhang & Jinpeng Ji & Zhaotao Song & Yanan Zhang & Yijun Xu & Tong Liu & Yang Liu & Zihan Zhang & Wenbin Gong & Yunong Wang & Zhenzhong Shi & Renzhi Ma & Jianxin Geng & H, 2024. "Covalently bridging graphene edges for improving mechanical and electrical properties of fibers," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49270-5
    DOI: 10.1038/s41467-024-49270-5
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    References listed on IDEAS

    as
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    2. Zhen Xu & Chao Gao, 2011. "Graphene chiral liquid crystals and macroscopic assembled fibres," Nature Communications, Nature, vol. 2(1), pages 1-9, September.
    3. K. S. Novoselov & V. I. Fal′ko & L. Colombo & P. R. Gellert & M. G. Schwab & K. Kim, 2012. "A roadmap for graphene," Nature, Nature, vol. 490(7419), pages 192-200, October.
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