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<p>Sorption-based atmospheric water harvesting (AWH) holds promise for on-demand water supply, yet combining high yield with fast kinetics remains challenging. Here, we present a hollow-fiber textile-supported composite sorbent and an integrated solar-powered water harvester. The composite sorbent is fabricated by embedding LiCl into a three-dimensionally oriented channel textile constructed from hollow <i>Calotropis gigantea</i> fibers. An airflow-assisted yarn assembly strategy is employed to form hollow-fiber yarns and further construct a three-dimensional textile with vertically aligned pore arrays. After LiCl integration, efficient water vapor sorption and rapid desorption are achieved. The sorbent attains water uptakes of 0.88, 1.39, and 2.34&#xa0;g&#xa0;g<sup>−1</sup> at relative humidities of 15%, 30%, and 60%, respectively. The harvester integrates power generation, heating, and condensation. When coupled with a multicycle sorption–desorption strategy, it yields about 64&#xa0;g&#xa0;day<sup>−1</sup> (5.19 g<sub>water</sub> g<sup>−1</sup><sub>sorbent</sub> day<sup>−1</sup>). The operation forms an energy-autonomous loop where daytime solar electricity is generated and stored, powering nighttime desorption and condensation. This work establishes a textile-based platform that integrates structural advantages with solar energy utilization, enabling efficient and scalable AWH systems.</p> Graphical Abstract <p></p>

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Natural Fibers Enable Textile-Based Composite Sorbent for All-Day Atmospheric Water Harvesting

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Jiang Wang,
  • Qianqian Shi,
  • He Shan,
  • Qingqing Zhang,
  • Shiyi Du,
  • Yuze Zhang,
  • Hao Qu,
  • Zechang Wei,
  • Yongchun Zeng,
  • Jun Wang,
  • Swee Ching Tan

摘要

Sorption-based atmospheric water harvesting (AWH) holds promise for on-demand water supply, yet combining high yield with fast kinetics remains challenging. Here, we present a hollow-fiber textile-supported composite sorbent and an integrated solar-powered water harvester. The composite sorbent is fabricated by embedding LiCl into a three-dimensionally oriented channel textile constructed from hollow Calotropis gigantea fibers. An airflow-assisted yarn assembly strategy is employed to form hollow-fiber yarns and further construct a three-dimensional textile with vertically aligned pore arrays. After LiCl integration, efficient water vapor sorption and rapid desorption are achieved. The sorbent attains water uptakes of 0.88, 1.39, and 2.34 g g−1 at relative humidities of 15%, 30%, and 60%, respectively. The harvester integrates power generation, heating, and condensation. When coupled with a multicycle sorption–desorption strategy, it yields about 64 g day−1 (5.19 gwater g−1sorbent day−1). The operation forms an energy-autonomous loop where daytime solar electricity is generated and stored, powering nighttime desorption and condensation. This work establishes a textile-based platform that integrates structural advantages with solar energy utilization, enabling efficient and scalable AWH systems.

Graphical Abstract