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<p>Solar steam generation (SSG), as a prominent solution among various seawater desalination technologies, provides an effective way to mitigate the global water resource scarcity issue. However, its large-scale implementation is impeded by intricate preparation techniques and suboptimal efficiency. Furthermore, it also encounters substantial challenges pertaining to salt resistance and durability. In this study, we developed the multi-layered tree-shaped biomimetic loop/plush flax fabrics with variable loop/plush height inspired by the transpiration and evaporation process of natural plants. The flax fabric is constructed by loop layer (LL)/plush layer (PL), plain weave layer (PWL), basket weave layer (BWL), and float layer (FL). The unique LL on the fabric surface was manufactured by employing the double warp beam weaving technology to enlarge the evaporation area. And the evaporation area of the fabric can be further enlarged by cutting the loops and loosening the twist of the yarns. Besides, the evaporation performance of the flax fabric was further enhanced by in-situ polymerization of the photothermal material (polydopamine-polypyrrole (PDA-PPy)) on the surface of the fabric. The hierarchical biomimetic structure of the loop/plush flax fabrics provides the continuous water transfer pathway and effectively controlled the water supply to the photothermal conversion interface. Among which, the loop flax fabric with higher loop height (HLTBFF-PDA-PPy) exhibited a evaporation rate of 1.51 kg m<sup>−2</sup> h<sup>−1</sup> with the evaporation efficiency up to 97.2% under one sun irradiation. This biomimetic structured fabric SSG exhibited a biomimetic-derived structure, enhanced evaporation performance, reliable salt-rejecting capability, and satisfactory long-term durability. This design offers potential support for advancing the large-scale application of water purification and seawater desalination technologies, providing a potential approach to addressing global water scarcity challenges and maintaining promising prospects in the field of SSG technology.</p>

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Multi-layered tree-shaped biomimetic flax fabric for highly efficient solar steam generation

  • 期刊论文

  • 发表日期：

    2026年2月28日

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  • Wang Cui,
  • Caixia Li,
  • Shengyu Zhang,
  • Mingyu Li,
  • Dongwei Huang,
  • Jie Fan

摘要

Solar steam generation (SSG), as a prominent solution among various seawater desalination technologies, provides an effective way to mitigate the global water resource scarcity issue. However, its large-scale implementation is impeded by intricate preparation techniques and suboptimal efficiency. Furthermore, it also encounters substantial challenges pertaining to salt resistance and durability. In this study, we developed the multi-layered tree-shaped biomimetic loop/plush flax fabrics with variable loop/plush height inspired by the transpiration and evaporation process of natural plants. The flax fabric is constructed by loop layer (LL)/plush layer (PL), plain weave layer (PWL), basket weave layer (BWL), and float layer (FL). The unique LL on the fabric surface was manufactured by employing the double warp beam weaving technology to enlarge the evaporation area. And the evaporation area of the fabric can be further enlarged by cutting the loops and loosening the twist of the yarns. Besides, the evaporation performance of the flax fabric was further enhanced by in-situ polymerization of the photothermal material (polydopamine-polypyrrole (PDA-PPy)) on the surface of the fabric. The hierarchical biomimetic structure of the loop/plush flax fabrics provides the continuous water transfer pathway and effectively controlled the water supply to the photothermal conversion interface. Among which, the loop flax fabric with higher loop height (HLTBFF-PDA-PPy) exhibited a evaporation rate of 1.51 kg m−2 h−1 with the evaporation efficiency up to 97.2% under one sun irradiation. This biomimetic structured fabric SSG exhibited a biomimetic-derived structure, enhanced evaporation performance, reliable salt-rejecting capability, and satisfactory long-term durability. This design offers potential support for advancing the large-scale application of water purification and seawater desalination technologies, providing a potential approach to addressing global water scarcity challenges and maintaining promising prospects in the field of SSG technology.