Bioinspired Heterogeneous Surface for Radiative Cooling Enhanced Power-Free Moisture Harvesting in Unsaturated Atmosphere.

Autor: Zhang C; Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China., Xie H; School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China., Du Y; Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China., Wu T; Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China., Wang Z; Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, P. R. China., Qu J; Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Dec 30, pp. e2414389. Date of Electronic Publication: 2024 Dec 30.
DOI: 10.1002/adma.202414389
Abstrakt: The development of zero-power moisture-harvesting technology in an unsaturated atmosphere is of great significance for coping with global freshwater scarcity. Here, inspired by Pachydactylus rangei's (Namib sand gecko) ability to evade thermal radiation and harvest moisture, a power-free cooling moisture harvester (PFCMH) is fabricated using the continuous, industrialized micro-extrusion compression molding. A Luneburg lens is introduced in the PFCMH for the first time, endowing it with a high reflectivity of ≈92.9% in 0.3 to the 2.5 µm waveband and emissivity of ≈98.1% in 8-13 µm waveband, which are ≈19.2% and ≈15.4% higher than those of the unstructured radiative cooler, respectively. Consequently, a temperature reduction of ≈6.9 °C is achieved. In addition, the wettability of PFCMH is well regulated, at a contact angle of ≈153° and a rolling angle of ≈42°, enabling its surface to efficiently nucleate and transport water droplets. The synergy between the surface and interface functions endows the PFCMH with exceptional passive sub-dewpoint cooling and efficient harvesting performance. Importantly, every 1 m 2 of PFCMH can yield ≈294.5-490.6 kg year -1 of water and save ≈198.7-331.0 kWh year -1 of electricity. The PFCMH offers an environmentally, power-free, and promising solution to freshwater scarcity.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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