PVDF-HFP/PU多孔涂层织物的制备及其辐射降温性能

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中图分类号：TS195.5 文献标志码：ADOI：10.13338/j. issn. 1006-8341. 2025. 04.003

AbstractTo investigate the effects of phase separation processes on polymer pore formation，polyester fabric was coated with poly （vinylidene fluoride-co-hexafluoropropylene） （PVDF-HFP） and polyurethane （PU） via a combined evaporation-induced and water vapor-induced phase separation （E-VIPS） method. The effects of environmental humidity and humidification duration on the surface morphology and solar reflectance of the coating fabrics were systematically investigated. Results demonstrate that under 70% relative humidity with 3h humidification，the E-VIPS-derived porous radiative coating fabric exhibited an average solar reflectance of 86.7% over the wavelength range of 250～2500nm and an emissivity of 90.2% within the atmospheric transparency window （ 8～ 13μm ）.Outdoor cooling tests demonstrate that the PRCF achieves a sustained cooling effect of 8.1°C （204号 below the substrate，exhibiting superior radiative cooling performance.

Keywordsporous fabric; micro-nano structures; combined phase separation; radiative cooling; coating

0 引言

辐射制冷技术通过增强材料在太阳光波段（250～2500nm 的高反射率[1-2]和大气窗口（ 8～13μm ）的高发射率[3-4]实现无能耗降温[5]。（剩余11869字）