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<p>Aerogel fibers (AFs), while promising for personal thermal management, are constrained by an inherent trade-off between mechanical robustness and thermal insulating performance. To resolve this mechanical-thermal coupling issue, we propose an ion-mediated attenuated Coulombic assembly of recyclable heterocyclic aramid nanofibers (HANFs) to construct hierarchical AFs, enabling programmable manipulation of pore size and porosity. HANF-AF features a dual-scale porous architecture, comprising a nano-porous core and a macro-porous cellular shell, which encloses interconnected nanofiber spacing with sub-50 nm pores. The hierarchically porous architecture and strong crosslinking endow HANF-AF with a synergy of tensile strength up to 83.1 MPa and thermal conductivity down to 22.0 mW·m<sup>-1</sup>·K<sup>-1</sup>. Their robustness enables knitting into an industrial-grade textile with superior insulating features over conventional thermal insulating fibers. By leveraging ion-mediated hierarchical assembly of recycled nano-building blocks, this work establishes a scalable and sustainable strategy for engineering multifunctional nanofibrous architectures, offering a blueprint for creating next-generation flexible, durable, and superinsulating materials for advanced thermal management.</p>

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Knittable, thermally insulating, and sustainable aerogel fibers enabled by ion-mediated hierarchical assembly

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月2日

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  • Gang Xiao,
  • Xiaotao Ma,
  • Bingyun Ma,
  • Zhaochang Chen,
  • Xingxiang Qi,
  • Chao Shen,
  • Jiayi Li,
  • Yinan Yang,
  • Zewan Lin,
  • Shendong Yao,
  • Jianing Yue,
  • Shiyu Duan,
  • Weifeng Yang,
  • Xuan Zhang,
  • Tao Cheng,
  • Pibo Ma,
  • Yuanlong Shao,
  • Jin Zhang

摘要

Aerogel fibers (AFs), while promising for personal thermal management, are constrained by an inherent trade-off between mechanical robustness and thermal insulating performance. To resolve this mechanical-thermal coupling issue, we propose an ion-mediated attenuated Coulombic assembly of recyclable heterocyclic aramid nanofibers (HANFs) to construct hierarchical AFs, enabling programmable manipulation of pore size and porosity. HANF-AF features a dual-scale porous architecture, comprising a nano-porous core and a macro-porous cellular shell, which encloses interconnected nanofiber spacing with sub-50 nm pores. The hierarchically porous architecture and strong crosslinking endow HANF-AF with a synergy of tensile strength up to 83.1 MPa and thermal conductivity down to 22.0 mW·m-1·K-1. Their robustness enables knitting into an industrial-grade textile with superior insulating features over conventional thermal insulating fibers. By leveraging ion-mediated hierarchical assembly of recycled nano-building blocks, this work establishes a scalable and sustainable strategy for engineering multifunctional nanofibrous architectures, offering a blueprint for creating next-generation flexible, durable, and superinsulating materials for advanced thermal management.