数字农科院2.0

A humidity/thermal dual response 3D-fabric with porous poly(N-isopropyl acrylamide) hydrogel towards efficient atmospheric water harvesting

文献类型： 外文期刊

作者： Zhang, Zhibin;Wang, Xi;Li, Hongyan;Liu, Gengchen;Zhao, Kaiying;Wang, Yajun;Li, Zheng;Huang, Jianying;Xu, Zhiwei;Lai, Yuekun;Qian, Xiaoming;Zhang, Songnan

作者机构：

关键词： 3D raised-fabric;Solar-thermal;Poly(N-isopropylacrylamide);Hydrogel;Atmospheric water harvesting

期刊名称： JOURNAL OF COLLOID AND INTERFACE SCIENCE

ISSN： 0021-9797

年卷期： 2024 年 653 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Atmospheric water harvesting is a promising approach for obtaining freshwater resources, but achieving high levels of light absorption, hygroscopic capacity, and desorption efficiency simultaneously remains a challenge. In this study, we developed an innovative atmospheric water harvester that incorporates a poly(N-iso-propylacrylamide) hydrogel and a polydopamine/polypyrrole-modified 3D raised-fabric. The interlacing structure and polydopamine/polypyrrole synergistically enhance the harvester's photothermal conversion capability, while the hydrogel-modified raised-fabric with its increased pore structure and high specific surface area ensures effective contact between the internal adsorbent and external moisture, thereby improving moisture capture and storage capacity. Our results indicate that the hydrogel-modified 3D raised-fabric has excellent photothermal conversion performance, as evidenced by its rapid temperature rise to 75.9 degrees C under 1 sun light intensity, which effectively promotes water evaporation and harvesting. Furthermore, the 3D raised-fabric exhibits exceptional water absorption (3.1 g g- 1, RH 90%) and water desorption (1.75 kg m -2h- 1, 1 sun) properties. Overall, the 3D raised-fabric with its integrated photothermal, hygroscopic, and hydrophobic properties can effectively collect water under low humidity conditions, making it a promising solution for water scarcity issues.

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