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<p>Liquid-crystalline (LC)-spinning of graphene oxide (GO) is a promising method for producing conducting fibres. However, achieving continuous wet-spinning via a multi-hole spinneret with organic solvent-based spinning dopes remains challenging, primarily because of the limitations in coagulation without ion crosslinking agents, such as Ca<sup>2+</sup> and Fe<sup>3+</sup>. In this study, we report the colloidal engineering of an LC GO-based spinning dope with highly oxidised single-walled carbon nanotubes (ox-SWCNTs) for continuous multi-hole wet-spinning. With 10 wt% ox-SWCNTs, GO retains its LC phase using a controlled solvent exchange strategy in <i>N</i>-methyl-2-pyrrolidone, which is a prerequisite for wet-spinning. The heterogeneous mixing of the ox-SWCNTs in the LC GO phase allows coagulation in ethyl acetate within a few seconds, which is facilitated by the rapid exchange of the dope solvent and coagulant through the ox-SWCNT networks. Moreover, ox-SWCNTs are utilised to modify fibre surfaces for applications in textile supercapacitors. The GO/ox-SWCNT@ox-SWCNT fibres exhibit an enhanced specific capacity of 138 mF/cm<sup>2</sup>. This study presents a promising approach for the continuous wet-spinning of nanocarbon materials through a multi-hole spinneret for textile electronics, addressing the challenges associated with dispersion in colloidal nanocarbon systems.</p>

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Controlled liquid crystal behavior of graphene oxide/single walled carbon nanotube mixtures for continuous multi hole wet spinning

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月3日

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  • Joon Young Cho,
  • Jung Hoon Kim,
  • Do Geun Lee,
  • Joo Hwan Jin,
  • Jong Hwan Park,
  • Joong Tark Han

摘要

Liquid-crystalline (LC)-spinning of graphene oxide (GO) is a promising method for producing conducting fibres. However, achieving continuous wet-spinning via a multi-hole spinneret with organic solvent-based spinning dopes remains challenging, primarily because of the limitations in coagulation without ion crosslinking agents, such as Ca2+ and Fe3+. In this study, we report the colloidal engineering of an LC GO-based spinning dope with highly oxidised single-walled carbon nanotubes (ox-SWCNTs) for continuous multi-hole wet-spinning. With 10 wt% ox-SWCNTs, GO retains its LC phase using a controlled solvent exchange strategy in N-methyl-2-pyrrolidone, which is a prerequisite for wet-spinning. The heterogeneous mixing of the ox-SWCNTs in the LC GO phase allows coagulation in ethyl acetate within a few seconds, which is facilitated by the rapid exchange of the dope solvent and coagulant through the ox-SWCNT networks. Moreover, ox-SWCNTs are utilised to modify fibre surfaces for applications in textile supercapacitors. The GO/ox-SWCNT@ox-SWCNT fibres exhibit an enhanced specific capacity of 138 mF/cm2. This study presents a promising approach for the continuous wet-spinning of nanocarbon materials through a multi-hole spinneret for textile electronics, addressing the challenges associated with dispersion in colloidal nanocarbon systems.