Preparation and Performance of UV-aging Resistant and Daytime Radiative Cooling Fabrics
Outdoor textiles with radiative cooling effect can effectively protect outdoor personnel under high summer temperature.In this paper,the coated fabric with good UV-aging resistant and radiative cooling func-tions was prepared with polyester fabric as the substrate,the self-made silicone-modified acrylic epoxy emulsion and the mixed dispersion of BaSO4 particles as the finishing agents.The results showed that when the coating a-mount was 11.55 mg/cm2,the average solar reflectance of the coated radiative cooling fabric could reach 92.56%,and the average mid-infrared emissivity of the atmospheric window could reach 91.36%.Under direct sunlight,the fabric could cool down 5.2℃compared with the original polyester one.And the coated radiative cooling fabric after finishing had good wear resistance and mechanical properties.In addition,after 24 hours of UV accelerated aging,the K/S value of the coated radiative cooling fabric remained almost unchanged.The aver-age UVA transmittance of the fabric was only 1.8%,and the UPF value could reach 387.03,showing good UV-aging resistance.The coated fabric has good application prospect in the field of outdoor cooling.
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