发射率
材料科学
纳米复合材料
辐射冷却
红外线的
辐射传输
光电子学
热的
吸收(声学)
图层(电子)
热辐射
低发射率
复合材料
被动冷却
聚乙烯
热发射率
辐射
保温
锡
低密度聚乙烯
碳酸钙
热阻
红外线加热器
氧化锡
光学
作者
Xuran Li,Xueming Fan,Ruilin Yang,Hongjian Guan,Peng Lian,Wenxin Zeng,Yang Wang,Yuanjie Su,Huiling Tai,Yadong Jiang,Weizhi Li
出处
期刊:Small
[Wiley]
日期:2025-10-19
卷期号:21 (49): e09710-e09710
标识
DOI:10.1002/smll.202509710
摘要
Passive radiative cooling (PRC) and passive radiative heating (PRH) have emerged as promising strategies for low-energy temperature control technology. However, conventional materials fall short in addressing the challenges posed by regionalized thermal control. In response, a dual-mode film capable of delivering both high-performance PRC and PRH is demonstrated. On the cooling side, a gradient densified structure is constructed by precisely controlling the size distribution of spherical calcium carbonate (CaCO3) and optimizing packing density within the PDMS matrix, resulting in a film with average solar reflectance of 95.2% and infrared emissivity of 96.7%. The heating side features a hierarchically structured PDMS/carbon nanotubes (CNTs) absorber templated from urchin-like CaCO3, further integrates with a polyethylene terephthalate/indium tin oxide (PET/ITO) infrared suppression layer to enhance solar absorption and minimize thermal radiation losses. The heating side achieves an average 30.2% solar reflectance and 2.5% infrared emissivity, demonstrating its excellent radiative heating properties. The dual-mode film achieves average subambient cooling of 7.6 °C and heating of 3.6 °C under sunny and cloudy conditions. The synergistic enhancement of cooling and heating can be achieved by adjusting the orientation of each mode in building applications, providing a novel approach for a low-energy, high-efficiency, and intelligent building thermal control system.
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