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Research Article

Environment-adaptive phase-separation-porous fluorofilm for high-performance passive radiation cooling

Weiming Tang1,2,§, Yong Li3,§, Xue Meng1,2,§, Shutao Wang1,2( ), Ziguang Zhao1,2( )
School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

§ Weiming Tang, Yong Li, and Xue Meng contributed equally to this work.

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Graphical Abstract

The fluorofilm can effectively reflect the sun by the phase-separation porous structure and the specific groups of the double-fluoro-network can emit heat to 3K space through atomspheric transmission window, resulting in the high performance of passive radiation cooling.

Abstract

Passive radiative cooling is widely recognized as an environmentally sustainable method for achieving significant cooling effects. However, the mechanical properties and environmental adaptability of current radiative cooling materials are not sufficient to maintain high cooling performance in external environments. Here we reported an environment-adaptive phase-separation-porous fluorofilm for high-performance passive radiation cooling. Compared to the homogenous fluoro-porous network with limited scattering efficiencies, we modulated the porous structure of the fluorofilm to achieve a strong emissivity of 95.2% (8–13 μm) and a high reflectivity of 97.1% (0.3–2.5 μm). The fluorofilm demonstrates a temperature drop of 10.5 °C and an average cooling power of 81 W·m−2 under a sunlight power of 770 W·m−2. The high mechanical performance and environmental adaptability of fluorofilms are also exhibited. Considering its significant radiative cooling capability and robust environmental adaptability, the fluorofilm is expected to have a promising future in radiative temperature regulation.

Keywords

fluorofilmpassive radiation coolingporous optimizationthermal regulation

Electronic Supplementary Material

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Nano Research
Volume 17 Issue 6,
June 2024
Pages 5636-5644
DOI: 10.1007/s12274-024-6420-0
Cite this article:
Tang W, Li Y, Meng X, et al. Environment-adaptive phase-separation-porous fluorofilm for high-performance passive radiation cooling. Nano Research, 2024, 17(6): 5636-5644. https://doi.org/10.1007/s12274-024-6420-0
Topics:
Polymer films Thin films

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Received: 23 October 2023
Revised: 01 December 2023
Accepted: 16 December 2023
Published: 24 January 2024
© Tsinghua University Press 2024
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