Preparation and optical properties of waterborne acrylic-based cool white coatings  

作　　者：Shengjun Cheng Hongjiang Liu Yanfeng Gao 

机构地区：[1]State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences [2]School of Materials Science and Engineering,Shanghai University

出　　处：《Chinese Science Bulletin》2014年第31期4142-4146,共5页

基　　金：supported in part by the National High Technology Research and Development Program of China(2012AA030305);the National Key Technology R&D Program(2012BAA10B03);the National Science Foundation for Distinguished Young Scholars of China(51325203);InnovationProgram of Shanghai Municipal Education Commission(14ZZ099)

摘　　要：Cool coatings(solar reflective coatings)possess a high total solar reflectance and a high thermal emittance,and they have potential applications in building surfaces,pavements,and oil tanks.By decreasing the accumulation of heat,these coatings can reduce the urban heat island effect to increase thermal comfort and to decrease energy consumption in hot zones.In this work,a cool white coating based on waterborne acrylic was prepared.The reflectance and thermal emittance were measured using an ultravioletvisible-near-infrared spectrophotometer and the steadystate calorimetric technique,respectively.The cool coating possessed a total solar reflectance of 0.887 and a thermal emittance of 0.85.The linear fitting results indicated that the thickness of the dry film is an important factor that affects the reflectance and that the physical limit of total solar reflectance in practical cool coatings is 0.91.A homemade device developed according to military specification MIL-E-46096C was used to measure insulation temperature differences,and an insulation temperature difference of29°C was obtained.The above results demonstrated that the cool coating can be applied to buildings.Cool coatings （solar reflective coatings） possess a high total solar reflectance and a high thermal emittance, and they have potential applications in building surfaces, pavements, and oil tanks. By decreasing the accumulation of heat, these coatings can reduce the urban heat island effect to increase thermal comfort and to decrease energy consumption in hot zones. In this work, a cool white coating based on waterborne acrylic was prepared. The reflectance and thermal emittance were measured using an ultraviolet- visible-near-infrared spectrophotometer and the steady- state calorimetric technique, respectively. The cool coating possessed a total solar reflectance of 0.887 and a thermal emittance of 0.85. The linear fitting results indicated that the thickness of the dry film is an important factor that affects the reflectance and that the physical limit of total solar reflectance in practical cool coatings is 0.91. A homemade device developed according to military specification MIL-E-46096C was used to measure insulation temperature differences, and an insulation temperature difference of 29 ℃ was obtained. The above results demonstrated that the cool coating can be applied to buildings.

关 键 词：水性丙烯酸 白涂料 丙烯酸系 光学性能 红外分光光度计 反射涂层 制备 城市热岛效应 

分 类 号：TQ637[化学工程—精细化工]