Superhydrophobic Composite Coatings Can Achieve Durability and Efficient Radiative Cooling of Energy-Saving Buildings.

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-09-04 Epub Date: 2024-08-23 DOI:10.1021/acsami.4c06827

Wenlong Zhou, Xiaohan Ma, Mai Liu, Jun Niu, Shengxing Wang, Shijie Li, Wei Wang, Yongzhe Fan

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Abstract

Passive daytime radiative cooling (PDRC) technology has received a great deal of attention in the field of energy efficiency and environmental protection as a sustainable technology and a large-scale and promising solution to mitigate the environmental impact of global warming. In this study, we prepared PDRC material by combining FEP with modified Al₂O₃ particles and using the method of spray combined with phase separation. The synergistic effect of the formed surface micronanostructures, combined with the molecular vibration of FEP and the phonon polarization resonance of Al₂O₃, further improves the optical performance of the PDRC coating. The PDRC coating has an average reflectivity of 0.96 in the solar spectral band (0.3-2.5 μm) and an average emissivity of 0.963 in the atmospheric window band ((8-13 μm). In addition, the PDRC coating had good hydrophobicity, and its water contact angle (WAC) reached 159.3°. Under direct sunlight conditions, PDRC materials have a good temperature drop (4.9 °C) compared to ambient temperatures and radiative cooling power (81.2 W/m²). The prepared coating maintains superhydrophobicity and excellent cooling performance when soaked in solutions of different pH values and UV radiation, which was of great significance for sustainable applications. Our work provides a form of long-term cooling that can be effectively implemented in green and energy-efficient buildings.

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超疏水性复合涂层可实现节能建筑的耐久性和高效辐射冷却。

被动式日间辐射冷却（PDRC）技术作为一种可持续发展的技术，以及一种大规模、有前景的缓解全球变暖对环境影响的解决方案，在节能环保领域受到了广泛关注。在这项研究中，我们将 FEP 与改性 Al2O3 粒子结合，采用喷雾结合相分离的方法制备了 PDRC 材料。所形成的表面微纳米结构与 FEP 的分子振动和 Al2O3 的声子偏振共振的协同效应进一步提高了 PDRC 涂层的光学性能。PDRC 涂层在太阳光谱波段（0.3-2.5 μm）的平均反射率为 0.96，在大气窗口波段（8-13 μm）的平均发射率为 0.963。此外，PDRC 涂层具有良好的疏水性，其水接触角（WAC）达到 159.3°。在阳光直射条件下，与环境温度和辐射冷却功率（81.2 W/m2）相比，PDRC 材料具有良好的温降（4.9 °C）。所制备的涂层在不同 pH 值的溶液和紫外线辐射中浸泡时仍能保持超疏水性和优异的冷却性能，这对于可持续应用具有重要意义。我们的工作提供了一种可在绿色节能建筑中有效实施的长期冷却方式。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.