Improving passive daytime radiative cooling via incorporation of composite nanoparticles into sheath of PU-PVDF core-sheath nanofiber film

被引：0

作者：

Liu, Weichao ^{[1
]}

Guo, Weiyang ^{[1
]}

Wang, Yang ^{[1
]}

Song, Lixin ^{[1
,2
]}

Du, Pingfan ^{[1
]}

Li, Ni ^{[1
]}

Xiong, Jie ^{[1
,3
]}

机构：

[1] Zhejiang Sci Tech Univ, Coll Text Sci & Engn, Hangzhou 310018, Peoples R China

[2] Zhejiang Sci Tech Univ, Shaoxing Keqiao Res Inst, Shaoxing 312030, Peoples R China

[3] Zhejiang Sci Tech Univ, Sch Fash Design & Engn, Hangzhou 310018, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2024年 / 255卷

关键词：

Radiative cooling; Personal thermal management; Core-sheath nanofiber film; Nanoparticles;

D O I：

10.1016/j.applthermaleng.2024.123955

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Climate change has recently caused more severe temperatures, increasing demand for personal thermal management outdoors. Radiative cooling fabrics, known for their potent cooling ability, play a crucial role in regulating the thermal balance of the human body in high-temperature environments. In this study, an innovative PU (polyurethane)-SiO2/TiO2@PVDF (polyvinylidene fluoride) core-sheath nanofiber film was developed by incorporating SiO2/TiO2 composite nanoparticles (STNs) into the sheath of the nanofibers through coaxial electrospinning. The PU-STNs@PVDF composite nanofiber film with thickness of similar to 100 mu m achieved a reflectance of 92 % in the visible to near-infrared spectral range and an emittance of 91 % within the atmospheric transparent window. The temperature of the PU-STNs@PVDF core-sheath nanofiber film was reduced by 6.9 degrees C and 4.7 degrees C compared with that of the cotton fabric and PU-PVDF nanofiber film, respectively. Under direct solar radiation in summer, the temperature of the PU-STNs@PVDF core-sheath nanofiber film was 7.7 degrees C lower than that of cotton fabric. The PU-STNs@PVDF core-sheath nanofiber film elongated at a break of 127.5 % and a tensile strength of 4.3 MPa, implying it promising flexibility. The PU-STNs@PVDF core-sheath nanofiber film possesses huge potential in personal thermal management.

引用

页数：10