Preparation of photonic crystal microspheres with highly saturated structural color through W/O/W multiple emulsion as the soft template

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI:10.1016/j.optmat.2026.117979

Xiaoyu Bai, Qiang Zhao, Tongtong Cao, Ming Li, Yuhua Cao

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引用次数: 0

Abstract

The cured photonic crystal microspheres was prepared through a soft template of water-in-oil-in-water (W/O/W) multiple emulsion, where poly(styrene/methacrylic acid)@polydopamine (P(St/MAA)@PDA) nanoparticles dispersed in water to build liquid colloidal crystals (LCCs) as the inner water phase. P(St/MAA)@PDA nanoparticles were prepared by in situ polymerization of dopamine (DA) on the surface of P(St/MAA) nanoparticles. P(St/MAA)@PDA LCCs with highly saturated colors were obtained owing to PDA absorbing incoherent scattered light. As the mass ratio of PDA to P(St/MAA) nanoparticles increased from 0.1 to 0.5, the arrangement of P(St/MAA)@PDA nanoparticles changed from long-range ordering to short-range ordering, and the angular dependence of the LCCs color gradually disappeared. As the mass fraction of P(St/MAA)@PDA nanoparticles ranged from 20% to 40%, the LCCs had angular dependent and bright color. The content of W/O emulsifier influenced the color phase and brightness of the cured microspheres. The cured microspheres with different sizes were obtained through adjusting the second emulsifying time to form W/O/W emulsion. Finally, the cured microspheres with blue, green and red colors were prepared by controlling the particle size of P(St/MAA) nanoparticles. P(St/MAA)@PDA microspheres with highly saturated structural colors can be directly applied as photonic crystal pigments in coatings and cosmetics without secondary assembly.

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以W/O/W复合乳剂为软模板制备结构色高饱和光子晶体微球

采用水包油包水（W/O/W）复合乳液软模板制备固化光子晶体微球，其中聚苯乙烯/甲基丙烯酸@聚多巴胺（P(St/MAA)@PDA）纳米颗粒分散于水中，形成液态胶体晶体（lcc）作为内水相。通过在P（St/MAA）纳米颗粒表面原位聚合多巴胺（DA）制备了P(St/MAA)@PDA纳米颗粒。由于PDA吸收了非相干散射光，得到了颜色高度饱和的P(St/MAA)@PDA lcc。随着PDA与P（St/MAA）纳米粒子的质量比从0.1增加到0.5，P(St/MAA)@PDA纳米粒子的排列由远程有序变为近程有序，lcc颜色的角依赖性逐渐消失。当P(St/MAA)@PDA纳米颗粒的质量分数在20% ~ 40%之间时，lcc具有角度依赖性和明亮的颜色。W/O乳化剂的含量影响固化微球的色相和亮度。通过调整二次乳化时间，得到不同粒径的固化微球，形成W/O/W乳液。最后，通过控制P（St/MAA）纳米颗粒的粒径，制备出蓝色、绿色和红色的固化微球。具有高度饱和结构色的P(St/MAA)@PDA微球可直接作为光子晶体颜料应用于涂料和化妆品中，无需二次组装。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.