一步处理双层乙基纤维素全彩亚环境白天辐射冷却

IF 60.1 1区材料科学 Q1 ENERGY & FUELS

Nature Energy Pub Date : 2026-04-13 DOI:10.1038/s41560-026-02039-0

Ying Liu, Niklas Blagojevic, Qingdong Xuan, Jiahe Liu, Yuan Liao, Yang Fu, Yanbo Fang, Pengfei Cheng, Xueling Xu, Tao Wang, Naiqin Yi, Wei Li, Marcus Müller, Jian-Guo Dai, Ronggui Yang, Dangyuan Lei

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引用次数: 0

摘要

被动辐射冷却可以冷却暴露在阳光下的物体，而不需要额外的能量输入。然而，在不牺牲太阳反射率的情况下开发美观的有色材料仍然具有挑战性。在这里，我们提出了一种生物质衍生的双层和彩色乙基纤维素（BCEC）涂层，通过控制干燥诱导的自分层，在单一铸造步骤中制造。通过调整前驱体浓度，我们调整顶层的厚度，在不引入太阳吸收的情况下，通过薄膜干涉产生不同的颜色。分层多孔底层提供高太阳反射率和长波红外发射。BCEC涂层在太阳强度为800 W m−2的情况下，太阳反射率达到97.0%，亚环境白天辐射冷却高达9°C。在香港潮湿的亚热带气候下进行的实地测试显示，BCEC涂料的性能优于市售的彩色涂料和荧光色涂料。我们的一步相分离方法可以简化制造，促进该技术的实际部署。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

One-step-processed bilayer ethyl cellulose for full-colour sub-ambient daytime radiative cooling

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One-step-processed bilayer ethyl cellulose for full-colour sub-ambient daytime radiative cooling

Passive radiative cooling can cool objects exposed to sunlight without requiring additional energy input. However, it remains challenging to develop aesthetically pleasing coloured materials without sacrificing solar reflectance. Here we present a biomass-derived, bilayer and coloured ethyl cellulose (BCEC) coating fabricated in a single casting step through controlled drying-induced self-stratification. By adjusting the precursor concentration, we tune the thickness of the top layer to produce different colours through thin-film interference without introducing solar absorption. The hierarchically porous bottom layer provides high solar reflectance and long-wave infrared emission. The BCEC coating achieves solar reflectance of 97.0% and sub-ambient daytime radiative cooling of up to 9 °C under a solar intensity of 800 W m−2. In field tests conducted in the humid subtropical climate of Hong Kong, the BCEC coating outperforms commercially available coloured paints and fluorescence-based coloured coatings. Our one-step phase-separation approach can simplify fabrication, facilitating the practical deployment of this technology.

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来源期刊

Nature Energy Energy-Energy Engineering and Power Technology

CiteScore

75.10

自引率

1.10%

发文量

193

期刊介绍： Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.