Spray Synthesis of Photonic Crystal Based Automotive Coatings with Bright and Angular‐Dependent Structural Colors,Advanced Functional Materials

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Spray Synthesis of Photonic Crystal Based Automotive Coatings with Bright and Angular‐Dependent Structural Colors
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-12-07 , DOI: 10.1002/adfm.202008601
Chuan Wang ₁ , Xi Lin ₂ , Christian G. Schäfer ₂ , Stefan Hirsemann ₂ , Jianping Ge ₁

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It is a challenge to prepare photonic crystal (PC) automotive coatings via spraying colloidal solutions because the fast fabrication tends to produce amorphous photonic crystals with faint colors. Here, a two‐step spraying process followed by thermal curing is developed to prepare waterproof PC coatings with bright, uniform, and angular‐dependent structural colors. The solvents in PC paint are studied to achieve a quick formation of liquid PC intermediate, which transformed into a highly crystalline PC coating. Thanks to the narrow and intense reflections, the as‐made coatings present colors with high saturation, including the red/yellow/green/blue colors achieved by tuning the particle size, and many spectral/non‐spectral colors via the mixing of base colors. Meanwhile, patterned or fully covered PC coatings with good chemical and mechanical stability can be prepared on different substrates, where the shiny colors changing with the viewing angles or the surface curvatures offer a new choice for personalized automotive coatings.

中文翻译：

喷涂合成具有光明和角度相关的结构色的光子晶体基汽车涂料

通过喷涂胶体溶液来制备光子晶体（PC）汽车涂料是一个挑战，因为快速制造往往会产生具有微弱颜色的非晶态光子晶体。在这里，开发了一种两步喷涂工艺，然后进行热固化，以制备具有明亮，均匀和与角度相关的结构颜色的防水PC涂料。对PC涂料中的溶剂进行了研究，以实现液态PC中间体的快速形成，然后将其转变为高度结晶的PC涂料。由于窄而强烈的反射，制成的涂料呈现出高饱和度的颜色，包括通过调整粒径而获得的红色/黄色/绿色/蓝色，以及通过混合基色而获得的许多光谱/非光谱色。同时，

更新日期：2020-12-07

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