材料科学
化学工程
解吸
纳米纤维
水蒸气
水分
相对湿度
吸附
纳米技术
复合材料
有机化学
化学
热力学
工程类
物理
作者
Jiayun Wang,Wenjun Ying,Bo-Wen Lin,Chunfeng Li,Chaohe Deng,Hua Zhang,Shige Wang,R.Z. Wang
标识
DOI:10.1002/adma.202408977
摘要
Abstract Sorption‐based atmospheric water harvesting (SAWH) is a promising approach for supplying water in off‐grid arid regions. However, it is difficult to improve the SAWH efficiency because water undergoes multiple phase transformations, such as water vapor–water (desorption and condensation) in the desorption phase. To address this issue, an ultrahygroscopic temperature‐responsive hydrogel nanofiber inspired by Tillandsia is developed, comprising poly N‐isopropylacrylamide, poly N‐dimethylacetamide, and carbon nanotubes and impregnated with lithium chloride (PCP@LiCl). The hydrophobicity of the nanofiber membrane is enhanced with increasing temperature, facilitating water separation from the hydrogel in liquid form. Moreover, PCP@LiCl exhibits unique kinetics at 25 °C and 15%–30% relative humidity, capable of adsorbing moisture to saturation within 2 h, and oozing liquid water within 5 min under sunlight. Through global potential modeling, it is demonstrated that PCP@LiCl has potential applications in arid and semiarid regions. This study provides new insights into the design of high‐performance composites for solar‐powered atmospheric water harvesting.
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