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Abstract:
Radiative cooling without using electricity represents an ideal green solution for air-conditioning. Despite exciting progress made so far, most of the radiative cooling materials are vulnerable to outdoor contamination, which leads to decreased performance. Herein, we fabricate a hierarchically structured PVDF/PDMS porous film which integrates strong sunlight reflectance (97%), high thermal-infrared emittance (96%) and robust super hydrophobicity (160.2). The synergy of the effective solar reflection and thermal-infrared emission enables the film to yield a sub-ambient temperature drop of 12.3 degrees C under strong sunlight. More importantly, the super hydrophobicity keeps the film away from contamination by self-cleaning, maintaining well the radiative cooling performance for a long-term outdoor use. Additionally, the as-obtained film shows excellent chemical durability after exposure to different pH solutions and UV light irradiation. This work provides a new strategy to integrate self-cleaning with radiative cooling, showing great potential to advance energy-free cooling materials toward real-world applications.
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CHEMICAL ENGINEERING JOURNAL
ISSN: 1385-8947
Year: 2022
Volume: 442
1 5 . 1
JCR@2022
1 3 . 4 0 0
JCR@2023
ESI Discipline: ENGINEERING;
ESI HC Threshold:66
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 118
SCOPUS Cited Count: 85
ESI Highly Cited Papers on the List: 9 Unfold All
30 Days PV: 1
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