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Sustainable passive radiation cooling transparent film for mobile phone protective screens

文献类型： 外文期刊

作者： Su, Weiyin 1 ; Liu, Hongren 1 ; Chang, Zeyu 1 ; Li, Wen 2 ; Yan, Shengkun 3 ; Li, Jie 4 ; Geng, Fanglan 4 ; Yao, Xi 5 ; Ma, Mingguo 1 ; Wang, Kun 1 ; Jiang, Jianxin 1 ;

作者机构： 1.Beijing Forestry Univ, Sch Mat Sci & Technol, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing 100083, Peoples R China

2.Guangxi Minzu Univ, Sch Chem & Chem Engn, Guangxi Collaborat Innovat Ctr Chem & Engn Forest, Guangxi Key Lab Chem & Engn Forest Prod, Nanning 830091, Peoples R China

3.Xinjiang Acad Agr Sci, Agr Mechanizat Inst, Urumqi, Peoples R China

4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing, Peoples R China

5.Int Ctr Bamboo & Rattan, Beijing 100102, Peoples R China

关键词： Gleditsia sinensis polysaccharides; High transparency; Passive radiation cooling; Mobile phone protective film

期刊名称：JOURNAL OF COLLOID AND INTERFACE SCIENCE （ 影响因子：9.7； 五年影响因子：8.9 ）

ISSN： 0021-9797

年卷期： 2025 年 680 卷

页码：

收录情况： SCI

摘要： Passive daytime radiative cooling (PDRC) is a promising approach to address energy, environmental, and safety issues caused by global warming, with high emissivity in a transparent atmospheric window and high reflectivity in the solar spectrum. However, most demonstrations of PDRC rely mainly on complex and expensive spectral selective nanophotonic structures, requiring specialized photonic structures that are both expensive and difficult to obtain. The superiorities of low-cost, abundant resources, renewability, and high value-added biomass resources prompt Gleditsia sinensis polysaccharides (GSP) to be used in thermal emission materials to explore further the characteristics of regulating object temperature within a specific range without any external energy consumption. The three-layer thermal emission film (PDMS3PG3/t4) obtained by the scalable scraping method has high transparency, hydrophobicity (114.2 degrees), and super flexibility. The spectral variations of non-selective PDMS3PG3/t4 (1.0 wt% GSP, 800 mu m thickness) in the 3-5 mu m and 8-13 mu m waveband ranges were discussed in detail, and high emissivities of 69.1 % and 92.2 % were obtained, respectively. PDMS3PG3/t4 was appointed a mobile phone screen film and experimented with a 4.9 degrees C average temperature difference below ambient temperature, materializing prime PDRC and desiring to broaden the passive cooling technology and reduce the global energy burden.

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