Hygroscopic-Microgels-Enabled Rapid Water Extraction from Arid Air

© 2022 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 12 vom: 09. März, Seite e2207786
1. Verfasser: Guan, Weixin (VerfasserIn)
Weitere Verfasser: Lei, Chuxin, Guo, Youhong, Shi, Wen, Yu, Guihua
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article arid environments atmospheric water harvesting hydrogels kinetics microgels
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520 |a Sorbent-based atmospheric water harvesting (AWH) has emerged as a promising decentralized water-production technology to mitigate the freshwater crisis in arid areas. Hydrogels have been regarded as attractive sorbents due to their high water retention and tailorable polymer-water interactions. Yet, the kinetics of water sorption and desorption at low relative humidity (RH) shall be improved for their practical implementation. Here, hygroscopic microgels (HMGs) composed of hydroxypropyl cellulose (HPC) and hygroscopic salt are reported, which achieve a water uptake of ca. 0.5-0.8 g g-1 at 15-30% RH. HMGs enable rapid sorption-desorption kinetics owing to the short-distance diffusion in the microgels and hydrophilicity-hydrophobicity switching of the thermoresponsive HPC. To validate the feasibility of HMGs for moisture extraction, a potential daily water collection of up to equivalent 7.9-19.1 L kg-1 at low RH is demonstrated, enabled by 24-36 operation cycles per day based on the material-level experiments. With renewable raw materials and superior performance, HMGs provide a sustainable approach for rapid moisture extraction in arid climates 
650 4 |a Journal Article 
650 4 |a arid environments 
650 4 |a atmospheric water harvesting 
650 4 |a hydrogels 
650 4 |a kinetics 
650 4 |a microgels 
700 1 |a Lei, Chuxin  |e verfasserin  |4 aut 
700 1 |a Guo, Youhong  |e verfasserin  |4 aut 
700 1 |a Shi, Wen  |e verfasserin  |4 aut 
700 1 |a Yu, Guihua  |e verfasserin  |4 aut 
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