反射率
环境科学
材料科学
遥感
光电子学
计算机科学
光学
地质学
物理
作者
Shuo Yang,Sizhe Tang,Yufeng Cai,Zhiming Ye,Xiangbin Zou,Xueyu Yuan,Yujie Song,Bing Li,Dongyan Tang,Ming Liu
出处
期刊:Advanced Science
[Wiley]
日期:2025-04-26
卷期号:12 (28): e2415121-e2415121
被引量:5
标识
DOI:10.1002/advs.202415121
摘要
Abstract Passive thermal‐regulation strategies have become increasingly important due to the strain alleviated on power grids for temperature management. Designing a system capable of automatically switching between cooling and heating modes in response to changing ambient conditions presents several specific challenges that engineers and researchers are actively addressing. In this research, a CaCl 2 incorporated PNIPAM coated fluorinated poly(aryl ether) (FPAE) porous film with tunable reflectance is developed. The aim is to mitigate the reliance on active cooling systems, which consume significant amounts of energy. The moisture‐temperature dual sensitive film exhibits a tunable reflectance range between 91.1% and 39.1% via phase change of the PNIPAM layer. Coupled with an infrared emissivity of 96.0%, a daytime cooling of 10 °C compared to the control experiment is achieved. Coating the film with a photothermal layer results in an adaptive Janus film that is capable of autonomous switching between heating and cooling, and demonstrates a heating of 22.5 °C in a cold environment. The facile preparation method, excellent cyclic stability, mechanical properties, and UL‐94 V‐0 rating enable promising applications of the smart film under diverse living environments.
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