材料科学
润湿
表面能
辐射冷却
制作
聚合物
辐射传输
接触角
发射率
复合材料
纳米结构
纳米技术
光学
物理
热力学
病理
医学
替代医学
作者
Dongmei Zhang,Hui-Di Wang,Mengchen Huang,Tingting Fan,Fuquan Deng,Chao-Hua Xue,Xiao-Jing Guo
出处
期刊:Surface Innovations
日期:2023-08-01
卷期号:11 (5): 285-296
被引量:3
标识
DOI:10.1680/jsuin.22.00015
摘要
Radiative cooling materials can cool terrestrial objects without any energy input but are susceptible to rain wetting and dust contamination, which affects badly their cooling characteristics. Herein, this work fabricated a radiative cooling porous film with superhydrophobic self-cleaning properties using poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly(vinylidene fluoride) (PVDF). The PVDF-HFP/PVDF film consists of micropores with nanoparticles both inside and at the surface. The micro/nanostructures enhanced the scattering of solar light, which in combination with the infrared emissivity of both PVDF-HFP and PVDF polymers makes the film show excellent radiative cooling ability with a sub-ambient temperature drop of 16°C. The micro/nanostructures roughened the surface of the film, which in combination with the low surface energy property of both PVDF-HFP and PVDF polymers endows the film with superhydrophobic self-cleaning properties. The self-cleaning function defends the film from contamination and maintains sustainable radiative cooling for lasting applications. The integration of cooling and self-cleaning into a film paves the way for multifunctional and long-life radiative cooling materials.
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