Brilliant colorful daytime radiative cooling coating mimicking scarab beetle

IF 17.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Matter Pub Date : 2024-11-15 DOI:10.1016/j.matt.2024.10.016

Xiaoyu Hou, Kaiyue Zhang, Xintao Lai, Liwei Hu, Florian Vogelbacher, Yanlin Song, Lei Jiang, Mingzhu Li

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Abstract

Passive daytime radiative cooling is regarded as a promising technology to achieve all-day subambient cooling without energy consumption and pollution. The installation of monotonous white radiative cooling coating on the facades of buildings poses challenges in terms of aesthetic integration. Fabricating radiative cooling coatings with different colors and high cooling efficiency at a low cost is an optimal solution for their broad adoption and commercialization. Here, inspired by the elytra of the scarab beetle, we design a hierarchically porous nested structured radiative cooling film with high subambient cooling efficiency and flexible color tunability. This film exhibits both high solar reflectance (93.4%) and superior thermal emissivity (92.3%), realizing subambient cooling of ∼10.2°C at night and ∼7.2°C at midday. Its color is brilliant, stable, and flexible. Additionally, this film is self-cleaning and can reduce noise, which suggests possibilities for the development of multifunctional radiative cooling surfaces in building envelopes, automobile coatings, and clothes.

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模仿猩红甲虫的绚丽多彩的日间辐射冷却涂层

被动式日间辐射冷却被认为是一种很有前途的技术，可在不消耗能源和不造成污染的情况下实现全天候亚环境冷却。在建筑物外墙安装单调的白色辐射冷却涂层在美学整合方面带来了挑战。要想广泛采用辐射冷却涂层并使其商业化，制造具有不同颜色和高冷却效率的低成本辐射冷却涂层是最佳解决方案。在此，我们受金龟子鳃甲的启发，设计了一种具有高亚环境冷却效率和灵活色彩可调性的分层多孔嵌套结构辐射冷却膜。这种薄膜同时具有高太阳反射率（93.4%）和卓越的热发射率（92.3%），可实现夜间 10.2°C 和正午 7.2°C 的亚环境制冷。它的颜色亮丽、稳定、柔韧。此外，这种薄膜还具有自洁功能，并能降低噪音，这为在建筑围护结构、汽车涂料和服装中开发多功能辐射冷却表面提供了可能性。

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来源期刊

Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

26.30

自引率

2.60%

发文量

367

期刊介绍： Matter, a monthly journal affiliated with Cell, spans the broad field of materials science from nano to macro levels,covering fundamentals to applications. Embracing groundbreaking technologies,it includes full-length research articles,reviews, perspectives,previews, opinions, personnel stories, and general editorial content. Matter aims to be the primary resource for researchers in academia and industry, inspiring the next generation of materials scientists.