材料科学
复合数
吸附
成核
化学工程
相对湿度
甲基丙烯酸缩水甘油酯
纳米结构
复合材料
纳米技术
共聚物
聚合物
有机化学
工程类
物理
化学
热力学
作者
Chuanruo Yang,Hao Wu,Jimmy Yun,Jiye Jin,Hong Meng,Jürgen Caro,Jianguo Mi
标识
DOI:10.1002/adma.202210235
摘要
Abstract Water harvesting using the metal‐organic framework (MOF)‐801 is restricted by limited working capacity, powder structuring, and finite stability. To overcome these issues, MOF‐801 is crystallized on the surface of macroporous poly( N ‐isopropylacrylamide‐glycidyl methacrylate) spheres, called P(NIPAM‐GMA), through an in situ confined growth strategy, forming spherical MOF‐801@P(NIPAM‐GMA) composite with temperature‐responsive function. By lowering the nucleation energy barrier, the average size of the MOF‐801 crystals decreases by 20 times. Thus, abundant defects as adsorption sites for water can be installed in the crystals lattices. As a consequence, the composite provides an unprecedented high water harvesting efficiency. The composite is produced in the kilogram‐scale and can capture 1.60 kg H 2 O/kg composite/day from 20% relative humidity between 25 and 85 °C. This study provides an effective methodology for improving the adsorption capacity through controlled defects formation as adsorption sites and to improve the kinetics through the design of a composite with macroporous transport channel network.
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