材料科学
吸附
解吸
相对湿度
化学工程
吸附
水分
干燥剂
聚合物
自愈水凝胶
复合材料
高分子化学
有机化学
气象学
化学
物理
工程类
作者
Hao Zhou,Li Yan,Dexi Tang,Ting Xu,Lin Dai,Chenyu Li,Wenshuai Chen,Hongxiang Xie
标识
DOI:10.1002/adma.202403876
摘要
Abstract Sorption‐based atmospheric water harvesting is an attractive technology for exploiting unconventional water sources. A critical challenge is how to facilitate fast and continuous collection of potable water from air. Here, a bio‐based gel (cellulose/alginate/lignin gel, CAL gel), resulting from the integration of a whole biomass‐derived polymer network with lithium chloride is reported. A fast adsorption/desorption kinetics, with a water capture rate of 1.74 kg kg −1 h −1 at 30% relative humidity and a desorption rate of 1.98 kg kg −1 h −1 , is simultaneously realized in one piece of CAL gel, because of its strong hygroscopicity, hydrophilic network, abundant water transport channels, photothermal conversion ability, and ≈200‐µm‐thick self‐supporting bulky structure caused by multicomponent synergy. A solar‐driven, drum‐type, tunable, and portable harvester is designed that can harvest atmospheric water within a brief time. Under outdoor conditions, the harvester with CAL gels operates 36 switches (180°) per day realizes a water yield of 8.96 kg kg gel −1 (18.87 g kg device −1 ). This portable harvester highlights the potential for fast and scalable atmospheric water harvesting in extreme environments.
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