Superhydrophobic cotton fabric based on aqueous paint for passive daytime radiative cooling

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2024-03-15 DOI:10.1016/j.porgcoat.2024.108395

Tian Zuo, Jiawen Zhang, Lang Xu, Tianqi Xu, Wenjun Ren, Wenjing Liu, Teng Wang, Songbo Wang, Ying Cai, Lingmin Yi

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Abstract

Passive daytime radiative cooling (PDRC) is a technology that dissipates excess heat to outer space without any energy consumption. Numerous PDRC materials have been developed recently. However, hazardous organic solvents are often used in the fabrication process of these PDRC materials, and most PDRC materials are easily contaminated. In this study, a new scalable eco-friendly aqueous paint without volatile organic compounds (VOCs) was developed by combining fluoroacrylate copolymer with high-scattering polysilsesquioxane particles. The solar reflectivity and emissivity of the cotton fabric coated with the aqueous paint (PDRC@CF) are significantly enhanced (reach 92.2 % and 92.7 %, respectively) due to the synergistic effect of fluoroacrylate copolymer and polysilsesquioxane. The PDRC@CF has a remarkable radiative cooling effect with a surface temperature 5.7 °C lower than the ambient air and 16.1 °C lower than the pristine cotton fabric under direct sunlight exposure. Moreover, the aqueous paint endows the PDRC@CF with a washable superhydrophobic surface, whose water contact angle is 150.1°and sliding angle is 2.3°, possessing excellent self-cleaning performance. The PDRC@CF effectively combining the properties of anti-fouling and radiative cooling, can be applied to outdoor product protection and other energy-efficient cooling fields.

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基于水性涂料的超疏水棉织物，用于日间被动辐射降温

被动式日间辐射冷却（PDRC）是一种在不消耗任何能源的情况下将多余热量散发到外层空间的技术。最近开发出了许多 PDRC 材料。然而，这些 PDRC 材料在制造过程中经常使用有害的有机溶剂，而且大多数 PDRC 材料都很容易受到污染。在这项研究中，通过将氟丙烯酸酯共聚物与高散射聚硅氧烷颗粒相结合，开发出了一种不含挥发性有机化合物（VOC）的新型可扩展环保水性涂料。由于氟丙烯酸酯共聚物和聚硅氧烷的协同作用，涂有该水性涂料（PDRC@CF）的棉织物的太阳反射率和发射率显著提高（分别达到 92.2% 和 92.7%）。PDRC@CF 具有显著的辐射冷却效果，在阳光直射下，其表面温度比环境空气低 5.7 °C，比原始棉织物低 16.1 °C。此外，水性涂料赋予了 PDRC@CF 可水洗的超疏水表面，其水接触角为 150.1°，滑动角为 2.3°，具有优异的自清洁性能。PDRC@CF 有效地结合了防污和辐射冷却的特性，可应用于户外产品保护和其他节能冷却领域。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.