Compared to traditional coatings, chromogenic coatings—the color change responds to external environment stimulus—have received lots of attention and being widely explored for applications. Due to their advanced features, the development of promising chromogenic coating systems is highly needed. In this work, a systematical and comprehensive comparison was studied regarding the benzodifuranone and benzodipyrrolidone based epoxy coating with different curing agents. The color change of the coatings was investigated and quantified by using a spectrophotometer and the reason for the color change was understood by UV/Vis characterization. The introduced pigment can react with the amide units of the curing agent to form hydrogen-bonded (NH⋯O) mediates, which leads to chromogenic coatings. The more free NH units (primaquine groups and secondary ammonia units) are contained in the curing agent, the color change is easier and stronger. This work provides a new approach to design chromogenic coatings through forming a hydrogen bonding between a pigment and a curing agent in the coating.

与传统涂料相比，发色涂料（颜色变化响应外部环境刺激）受到了广泛的关注，并已得到广泛的应用探索。由于其先进的功能，迫切需要开发有前途的生色涂层系统。在这项工作中，对使用不同固化剂的苯并二呋喃酮和苯并二吡咯烷酮基环氧涂料进行了系统，全面的比较。使用分光光度计研究并定量了涂层的颜色变化，并且通过UV / Vis表征了解了颜色变化的原因。引入的颜料可以与固化剂的酰胺单元反应，形成氢键（NH = O）介体，从而形成发色涂层。固化剂中包含的游离NH单元（伯氨苄基和仲氨单元）越多，颜色变化就越容易且越强。这项工作提供了一种通过在涂料中的颜料和固化剂之间形成氢键来设计发色涂料的新方法。