热敏变色微胶囊的变色色谱拓展及其应用

为解决热敏变色材料色谱范围窄、颜色变化单一的问题,以使用原位聚合法得到的热敏变色微胶囊为基础模板,将其分别与制备的红、黄色微胶囊进行拼色实验。通过减法混色原理,不同颜色的微胶囊混合后会呈现出另一种颜色,达到了色谱拓展的目的。借助扫描电子显微镜及红外光谱仪表征了微胶囊的形貌和结构,测试了拼色样品的色差、反射率、K/S值。结果表明:成功制备出了以甲醛-三聚氰胺树脂为壁材、三芳甲烷类基础变色体系为芯材的热敏变色微胶囊;随着外界温度的变化,微胶囊混合体系的颜色也发生显著变化,实现了在不同色调之间的可逆变化,拓展了热敏变色微胶囊的变色色谱范围。

Development and application of color change chromatography with thermochromic microcapsules

In order to address the problems of narrow chromatographic range and limited color of thermosensitive materials, the thermosensitive microcapsules obtained by in-situ polymerization method were used as the basic template for research. They were compared with the prepared red and yellow microcapsules for color-matching experiments. Through the principle of subtractive color mixing, microcapsules of different colors will present another color, fulfilling the purpose of chromatographic expansion. Electron microscopy and infrared spectroscopy results showed that thermosensitive color-changing microcapsules using formaldehyde-melamine resin as the wall material and triarylmethane-based basic color-changing system as the core material were a success. The color difference, reflectance, and K/S values of the color-matched samples were tested, and the results showed that the color of the microcapsule hybrid system also changed significantly with the change of the external temperature, achieving a reversible change between different shades and expanding