Liu Xiaomei, Ding Wenbin, Feng Tao, Yang Cailing, Li Jing, Liu Pengbo, Lei Ziqiang
Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
J Colloid Interface Sci. 2024 Nov;673:817-825. doi: 10.1016/j.jcis.2024.06.112. Epub 2024 Jun 18.
Atmospheric water harvesting through reticular materials is an innovation that has the potential to change the world. Here, this study offers a technique for creating a solar-powered hygroscopic polymer material for atmospheric water harvesting with the reticular materials. The results show that the porous hygroscopic polymer materials can achieve high performance with high vapor capture (up to ac. 28.8-49.7 mg/g at 28-38 %RH and 25 ℃), rapid photothermal conversion efficiency (up to 32.2 ℃ within 15 min under 1000 W/m light at 25 ℃), a low desorption temperature (lower than 40 ℃), and an effective water release rate. Besides, the material also has excellent water-retention properties, which can effectively store desorbed liquid water in polymer networks for use by vegetation during water demand periods. The strategy opens new avenues for atmospheric water-harvesting materials, which will hopefully solve the global crisis of freshwater shortages.
通过网状材料进行大气水收集是一项具有改变世界潜力的创新。在此，本研究提供了一种利用网状材料制造用于大气水收集的太阳能吸湿聚合物材料的技术。结果表明，多孔吸湿聚合物材料可实现高性能，具有高蒸汽捕获量（在28 - 38%相对湿度和25℃条件下高达约28.8 - 49.7毫克/克）、快速光热转换效率（在25℃下1000瓦/平方米光照下15分钟内温度高达32.2℃）、低解吸温度（低于40℃）以及有效的水分释放速率。此外，该材料还具有优异的保水性能，能够在聚合物网络中有效储存解吸的液态水，以供植被在需水期使用。该策略为大气水收集材料开辟了新途径，有望解决全球淡水短缺危机。
