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Vapor Exchange Induced Particles‐Based Sponge for Scalable and Efficient Daytime Radiative Cooling
Passive daytime radiative cooling technology (DRCT) has recently gained significant attention for its ability to achieve sub‐ambient temperature without energy consumption, making it an attractive option for space cooling. The cooling performance can be further improved if radiative cooling material...
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Published in: | Advanced functional materials 2023-10, Vol.33 (44) |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Passive daytime radiative cooling technology (DRCT) has recently gained significant attention for its ability to achieve sub‐ambient temperature without energy consumption, making it an attractive option for space cooling. The cooling performance can be further improved if radiative cooling materials also exhibit high thermal insulation performance. However, synthesizing radiative cooling materials that possess low thermal conductivity while maintaining mechanical durability remains a challenge. Here, a vapor exchange method is developed to prepare particles‐based poly(vinylidene fluoride‐co‐hexafluoropropylene) sponge materials for scalable and efficient daytime radiative cooling. By tailoring the particle diameter distribution, high solar reflection (94.5%), high infrared emissivity (0.956), and low thermal conductivity (0.048 W m
−1
K
−1
) are achieved, resulting in a sub‐ambient cooling of 9.8 °C under direct solar irradiation. Additionally, the sponge material exhibits good mechanical durability, sustaining deformation with a strain up to 40%, making it adaptable to diverse scenarios. A radiative cooling material with mechanical durability and thermal insulation can thus pave the way for large‐scale applications of DRCT. |
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ISSN: | 1616-301X 1616-3028 |
DOI: | 10.1002/adfm.202304073 |