反射隔热涂料是一类新型建筑材料, 具有隔热、 节能、 环保等功能, 已广泛用于建筑外部结构。 反射隔热涂料性能的高低主要决定于其与太阳辐射相互作用, 即反射隔热涂料对太阳辐射的反射、 吸收能力可直接反映其隔热、 保温性能的优劣。 对于特定反射隔热涂料, 其光谱特性主要取决于其施工厚度参量, 施工厚度的变异可直接影响反射隔热涂料的光谱特征且施工厚度的变异又对其施工效率具有较大影响, 因此探析反射隔热涂料的光谱特性随厚度参量的变化规律, 明确最佳反射隔热涂料施工厚度, 对于减少耗材, 优化施工工艺具有重要的现实与理论意义。 为定量分析施工厚度参量对反射隔热涂料的光谱特征的影响规律, 利用0, 0.5, 1.0, 1.5, 2.0 mm共5类涂料厚度的光谱数据为数据源, 采用去包络线、 吸收峰深度、 减法方法处理分析光谱数据, 定量分析厚度参量对反射隔热涂料反射性能、 吸收性能的作用规律, 研究结果表明: (1)除紫外-蓝光外, 涂料对光的反射作用随波长增加整体呈减弱趋势, 即涂料对短波波段具有较强的反射作用, 而对长波波段的吸收作用则较强, 这表明涂料具有一定的隔热、 保温性能; (2)涂料厚度增加有助于涂料隔热性能的提升, 但无助于增强涂料的保温性能, 厚度提升有助于增强涂料的反射特性, 但涂料反射率的增长幅度却呈先升高后降低的趋势, 吸收峰深度的变化幅度呈先增加后减小的趋势, 其中在厚度达到1.0 mm时涂料反射率增强趋向饱和; (3)涂料厚度对吸收谷深度具有明显影响, 对吸收谷(峰)值位置具有一定作用, 在涂料厚度在达到1.0 mm时, 吸收谷(峰)的波形发生变化。

Reflective thermal insulation coatings are a new type of building materials, which have the functions of heat insulation, energy saving and environmental protection, and have been widely used in external structures of buildings. The performance of reflective thermal insulation coatings is mainly determined by their interaction with solar radiation, that is, the reflective and absorptive capacity of reflective thermal insulation coatings can directly reflect the advantages and disadvantages of their thermal insulation and thermal insulation performance. For specific reflective heat insulation coatings, the spectral characteristics of reflective heat insulation coatings mainly depend on their construction thickness parameters. The variation of construction thickness can directly affect the spectral characteristics of reflective heat insulation coatings, and the variation of construction thickness has a great impact on its construction efficiency. Therefore, the variation of spectral characteristics of reflective heat insulation coatings with thickness parameters is explored to determine the best reflective heat insulation coatings. Construction thickness has important practical and theoretical significance for reducing consumption of materials and optimizing construction technology. In order to quantitatively analyze the influence of construction thickness parameters on the spectral characteristics of reflective heat insulating coatings, the spectral data of the thickness of five types of coatings, 0, 0.5, 1.0, 1.5 and 2.0 mm, were used as data sources. The spectral data were processed and analyzed by the methods of de-envelope, absorption peak depth and subtraction, and the effect rules of thickness parameters on reflective and absorption properties of reflective heat insulating coatings were quantitatively analyzed. The results show that: (1) except for ultraviolet-blue light, the reflectivity of coatings to light decreases with the increase of wavelength, that is, coatings have strong reflectivity to short wave band and strong absorption to long wave band, which indicates that coatings have certain thermal insulation and thermal insulation properties; (2) the increase of coatings thickness helps to improve the thermal insulation performance of coatings, but it is helpless. In order to enhance the thermal insulation performance of coatings, the increase of thickness is helpful to enhance the reflectivity of coatings, but the increase of reflectivity of coatings increases first and then decreases, and the change of absorption peak depth increases first and then decreases. When the thickness reaches 1.0 mm, the reflectivity of coatings tends to be saturated; (3) the thickness of coatings has a significant effect on the depth of absorption Valley and has an effect on absorption. Valley (peak) position plays an important role. When the coating thickness reaches 1.0 mm, the absorption Valley (peak) waveform changes.