【摘要】 设计了一种具有协同辐射与蒸发冷却效应的复合织物，旨在突破单一被动日间辐射冷却技术在地域与气候条件下的应用局限。以醋酸纤维素为成膜骨架、硫酸钡为散射增强粒子，通过相分离法在负载氯化钙的棉织物表面构筑复合层，利用氯化钙吸湿性触发蒸发冷却，使材料兼具高太阳反射率（93.6%）与高红外发射率（98.8%）。户外测试结果表明，在辐照强度727 W/m~2条件下，该织物温度比棉织物低5.1℃，比环境温度低6.0℃，且比单一辐射制冷织物低2.1℃；穿戴测试中持续降温2.0～4.0℃。辐射与蒸发冷却的协同作用为提升被动冷却性能提供了有效途径。更多还原

【Abstract】 This study presents a composite fabric that synergistically combines radiative and evaporative cooling effects to overcome the geographical and climatic constraints inherent in standalone passive daytime radiative cooling technologies. Using cellulose acetate as the film-forming matrix and barium sulfate as the scattering enhancer, a composite layer is constructed on calcium chloride-loaded cotton fabric via phase separation. The hygroscopic calcium chloride enables evaporative cooling by capturing atmospheric moisture, while the cellulose acetate/barium sulfate layer endows the fabric with a high solar reflectance of 93.6% and a high infrared emissivity of 98.8% for efficient radiative cooling. Outdoor testing under a solar irradiance of 727 W/m2 shows that the fabric achieves a temperature 5.1 ℃ lower than that of cotton fabric, 6.0 ℃ below the ambient temperature, and 2.1 ℃ lower than that of a pure radiative cooling fabric. Wearability tests demonstrate a sustained skin temperature reduction of 2.0～4.0 ℃. The synergistic integration of radiative and evaporative cooling offers a promising strategy to advance passive cooling performance.更多还原