Wet-Spinning Knittable Hygroscopic Organogel Fibers Toward Moisture-Capture-Enabled Multifunctional Devices

Atmospheric moisture exploitation is emerging as a promising alternative to relieve the shortage of freshwater and energy. Efforts to exploit hygroscopic materials featuring flexibility, programmability, and accessibility are crucial to portable and adaptable devices. However, current two-dimensional (2D) or three-dimensional (3D)-based hygroscopic materials are difficult to adapt to diverse irregular surfaces and meet breathability, which severely hinders their wide applications in wearable and programmable devices. Herein, hygroscopic organogel fibers (HOGFs) were designed via a wet-spinning strategy. The achieved fibers were composed of the hydrophilic polymeric network, hygroscopic solvent, and photothermal/antibacterial Ag nanoparticles (AgNPs), enabling hygroscopic capacity, photothermal conversion, and antibacterial. Owing to the good knittable feature, the HOGFs can be readily woven to adjusted 2D textiles to function as an efficient self-sustained solar evaporator of 4-layer woven HOGF device with a saturated moisture capacity of 1.63 kg m −2 and water-releasing rate of 1.46 kg m −2  h −1 . Furthermore, the 2D textile can be applied as a wearable dehumidification device to efficiently remove the evaporative moisture from human skin to maintain a comfortable environment. It can reduce the humidity from 90 to 33.4% within 12.5 min. In addition, the introduction of AgNPs can also endow the HOGFs with antibacterial features, demonstrating significant potential in personal healthcare.