喷墨打印快速制备光子晶体结构色

Quick Preparation of Photonic Crystal Structural Color by Ink-jet Printing

目的研究实现玻璃基底上快速制备光子晶体结构色的方法及条件。方法结合喷墨打印聚苯乙烯微球(PS)乳液与墨滴自组装技术。首先乳液法合成PS乳液,然后将其配制成墨水,优化基底润湿性、基底温度、打印次数等打印条件,使PS粒子呈规则排列,最后采用光纤光谱仪、色度计对打印的结构色进行表征。结果采用含质量分数为10%PS的墨水并添加乙二醇作为保湿剂,在基底温度为45℃时,实现一次打印得到结构色。光谱反射曲线主反射峰在400 nm处,对应的反射率为83%,LCH分别为38.55,25.16,272.8。结论通过一次打印PS乳液可快速得到结构色,克服了传统竖直沉积方法耗时耗材的缺点。结构色制备具有简单、显色独特、耐老化性优良等优点,可用于包装、防伪等领域。

The work aims to study the method and proper conditions of quick preparation of structural color of photonic crystal on the glass substrate. This could be acquired by combining ink-jet printing polystyrene microsphere（PS） emulsion and self-assembly of drops. First, PS emulsion was prepared by emulsion polymerization. Second, emulsion was prepared as proper ink-jet ink and some printing conditions（including the wetting and temperature of substrate and printed times） were optimized to regularly array PS particles. Finally, the printing structural colors were represented with fiber optic spectrometer and colorimeter. With the moisturizer composed of 10%PS ink and 30% ethylene glycol, the structural color could be rapidly prepared by only one-time printing when the substrate was at 45 ℃. The main reflection peak of curve was at 400 nm, the corresponding reflectivity was 83%, and the LCH was respectively 38.55, 25.16 and 272.8. Structural color can be quickly achieved via one-time printing of PS emulsion, and the disadvantages of traditional time-/material-consuming vertical deposition method were overcome. The preparation of structural color is featured by the such advantages as simplicity, unique coloration and excellent ageing resistance and it can be applied in packaging, anti-counterfeiting and other fields.