Radiant cooling composite films were prepared by electrospinning method with polymethyl methacrylate (PMMA) as matrix,ZnO and ZrO2 as additives.The net radiative cooling power of the film was measured by a self-assembly test device.The influence of the inorganic particles on cooling effect was investigated.The results shown that the film exhibited the best radiative cooling property when ZrO2 was selected as the additive,and the addition amount was 8wt%.The reflectance in the solar spectrum was 97.7%,and the emissivity in the sky window was 86.7%.The film shown temperature difference of 3.5℃ lower than the ambient temperature,and net radiative cooling power of 62.6W/m2 under an average solar illumination intensity of 617W/m2.
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基金资助
国家自然科学基金资助项目(51741206,51872151);山东省自然科学基金(ZR2017MEM004)
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