自愈水凝胶
材料科学
多孔性
蒸发
化学工程
曲折
多孔介质
纳米技术
海水淡化
弹性(物理)
复合材料
化学
高分子化学
膜
工程类
物理
热力学
生物化学
作者
Youhong Guo,Luize Scalco de Vasconcelos,Neha Manohar,Jiafeng Geng,Keith P. Johnston,Guihua Yu
标识
DOI:10.1002/anie.202114074
摘要
Interfacial evaporation using porous hydrogels has demonstrated highly effective solar evaporation performance under natural sunlight to ensure an affordable clean water supply. However, it remains challenging to realize scalable and ready-to-use hydrogel materials with durable mechanical properties. Here, self-assembled templating (SAT) is developed as a simple yet effective method to fabricate large-scale elastic hydrogel evaporators with excellent desalination performance. The highly interconnected porous structure of the hydrogels with low tortuosity and tunable pore size enables high level of tunability on the water transport rate. With superior elasticity, the porous hydrogels are easy to process with a rapid shape recovery after being rolled, folded, and twisted over hundred times, and exhibit highly effective and stable evaporation with an evaporation rate of ≈2.8 kg m-2 h-1 and ≈90 % solar-to-vapor efficiency. It is anticipated that this SAT strategy, without the typical need for freeze-drying, will accelerate the industrialization of hydrogel solar evaporators for practical applications.
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