论文标题
通过两亲性瓶刷块共聚物的受控胶束化的角度独立光子色素
Angular Independent Photonic Pigments via the Controlled Micellization of Amphiphilic Bottlebrush Block Copolymers
论文作者
论文摘要
具有角度独立结构颜色的光子材料是非常需要的，因为它们提供了在油漆，化妆品，纺织品或显示器中以涂抹量所需的宽视角。但是，由于仅具有短距离相关性的各向同性纳米级体系结构，因此他们需要制造挑战。在本文中，具有这种结构的多孔微粒是从两亲性奶瓶纸块共聚物中以单个可扩展的步骤产生的。这是通过利用新型的受控胶束化自组装机制来实现的。通过限制通过液滴界面的水渗透，可以精确解决孔的大小，从而产生结构上有色的色素。此外，可以通过更改初始乳化条件来使用单个聚合物（MN = 290 kDa）来调整反射颜色以在整个可见光谱上反射。这种光子色素比其晶体类似物具有多个关键优势，因为它们提供了各向同性的结构色素，可抑制虹彩并提高色彩纯度，而无需折射率匹配或宽带吸收器。
Photonic materials with angular independent structural colour are highly desirable because they offer the broad viewing angles required for application as colorants in paints, cosmetics, textiles or displays. However, they are challenging to fabricate as they require isotropic nanoscale architectures with only short-range correlation. In this article, porous microparticles with such a structure are produced in a single, scalable step from an amphiphilic bottlebrush block copolymer. This is achieved by exploiting a novel controlled micellization self-assembly mechanism within emulsified toluene-in-water droplets. By restricting water permeation through the droplet interface, the size of the pores can be precisely addressed, resulting in structurally coloured pigments. Furthermore, the reflected colour can be tuned to reflect across the full visible spectrum using only a single polymer (Mn = 290 kDa) by altering the initial emulsification conditions. Such photonic pigments have several key advantages over their crystalline analogues, as they provide isotropic structural coloration that suppresses iridescence and improves colour purity without the need for either refractive index matching or the inclusion of a broadband absorber.
