四层对称结构随角异色颜料制备与光谱特性研究

采用经过酸碱预处理的具有干涉色的云母钛作为基质材料，分别包覆氧化铁、氧化铬、氧化钴制得三层结构随角异色颜料。通过改变包覆层数和各层间的排列顺序，增加基质材料与外层包覆材料的反射率差值，获得变色效果更加明显的四层结构随角异色功能颜料。用X-Rite MA86Ⅱ5角度分光光度计对颜料的反射率光谱和CIE色度值进行测试分析，研究了四层结构对颜料随角异色效果的影响，分析比较不同的包覆物与颜料随角变色效果的关系。结果表明，采用多层膜包覆，能够增加基底材料与外层包覆层的反射率，增强颜料的颜色，颜料的颜色在不同的角度会有更明显的变化，随角异色效果更加显著。

Preparation and Spectra Characterization of Optically Variable Pigments with Four Symmetrical Configurations

The optically variable pigments with four symmetrical configurations were obtained by using the mica titanium as the host materials, which was pretreated in acid and alkaline condition. The reflection differences between the host materials and the coatings were increased by optimizing the number of layers and the arrangement order. The optically variable effect was investigated by X-Rite MA86II five angles spectrophotometer. The impact of symmetrical configurations on improving the color travel effect was studied, and the influence of different coating materials on the hue and the color travel effect was researched. The results show that the reflection rate and the color travel effect of the pigment were improved by coating another material on three symmetrical configurations.