热反射隔热涂料自然暴露后反射性能试验研究

Experimental Study on Reflective Performance of Thermal Reflective Insulation Coating after Natural Exposure

对制备的5种热反射隔热涂料开展了2 a的自然暴露试验。研究分析了5种不同组成体系热反射隔热涂料产品的太阳光反射比、近红外反射比、半球发射率、明度值等性能变化规律。结果表明:自然老化前后的反射性能与基材种类无关;自然老化后,样品半球发射率变化不大,相同热反射隔热涂料样品的半球发射率基本在0. 8～0. 9之间,5种热反射隔热涂料的太阳光反射比经过24个月的自然暴露后,太阳光反射比的衰减都在30%以上。

A natural exposure field was established for the prepared five kinds of thermal reflective insulation coatings and a natural exposure test was conducted for two years.The analysis of the sunlight reflectance,near infrared reflectance,hemispherical emissivity,and lightness value of the thermal reflective insulation coating products of A,B,C,D,E five different compositional systems was conducted.The results showed that the reflective performance before and after natural aging had nothing to do with the type of substrate.After natural aging, the hemispherical emissivity of the sample did not change much.The hemispherical emissivity of the same thermal reflective insulation coating sample is basically between 0.8 and 0.9.The sunlight reflectance of the thermal reflective insulation coatings after 24 months of natural ex- posure was reduced by more than 30%.