Shuliang Li, Guomin Du, Min Pan, Xiaoliang Wang, Xinyi Dong, Ting Huang, Dingyuan Hu, Tao Ren, Xue Li, Hong Chen, Xianmin Mai
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引用次数: 0
Abstract
Passive daytime radiative-cooling materials (characterized by a high solar reflectance and thermal emittance) exhibit a cooling effect under direct sunlight with zero energy consumption, thereby decreasing the demand for air conditioning. Although various well-designed radiative-cooling materials have been reported to date, their syntheses are environmentally harmful and unsuitable for large-scale operation (as they involve complicated, high-cost, or solution-processed methods). In this study, a hierarchical-morphology coating for large-scale radiative-cooling applications was constructed by a one-step, inexpensive, solution-free, and environmentally friendly strategy. The hierarchical morphology (comprising nanospheres and micropores randomly dispersed throughout a polymer matrix) was fabricated through simple mechanical stirring (without the use of templates); no solvents or by-products were produced during the manufacturing process. The optimal coating showed high emissivity (95.1%) in the atmospheric-window band, strong solar reflectivity (94.0%), and a cooling power of 62.94 W m−2 (according to field tests). Moreover, covering the roof of a model with the as-prepared hierarchical-morphology coating reduced the average roof temperature by 11.5 ℃ (according to outdoor tests). According to simulations, the coating enabled annual cooling-energy-consumption savings in the range of 14.5–41.2% for typical buildings located in different climatic regions, indicating high potential as an energy-saving building-envelope material.
Graphical Abstract
A one-step, scalable and sustainable strategy has been developed to fabricate hierarchical-morphology coatings for passive daytime radiative cooling.
期刊介绍：
Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field.
The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest.
Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials.
Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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