无角度依存准晶结构生色体系的构建与生色机制

Bragg diffraction is the theoretical basis of the photonic crystal structure color with strong angle dependence. In this project, angle-independent quasi-crystal structural color system from the coherent scattering will be constructed. The novel Black-PS@PA microspheres with the structure of hard core-soft shell are designed and synthesized, and the controllable preparation technology is studied to realize the modulation of morphology and particle sizes. The influence of external disturbance on the assembly process of microspheres will be researched to build the quasi-crystals. The adhesion and curing effect of the shell polyester is used to realize the long effect locking of the quasi-crystal structure. The correlation between the nuclear structure and the visible light absorption is studied, and the color saturation will be improved due to the shield of incoherent scattering and the background light. The quasi-crystal structural color system with large area is realized by using the heat auxiliary equipment or the hot extruded equipment. The chromophoric mechanism and theory of quasi-crystal structure will be revealed by researching the correlation between the material microstructure and color modulation rule, which is beneficial for the large area construction of angle-independent structure chromophore system.

布拉格衍射是光子晶体有序阵列结构生色的理论基础，颜色具有强烈的角度依存性。本项申请拟突破布拉格限制，构建基于相干散射引起的无角度依存准晶结构生色体系。创新设计背景光自吸收的硬核-软壳Black-PS@PA微球，研究其可控制备技术，实现核壳微球的形貌与粒径调变；研究外界扰动对微球组装的影响规律，建立短程有序、长程无序准晶结构的扰动组装新途径；研究壳层聚酯的粘结固化作用，实现准晶结构的长效锁定；研究核层结构与可见光吸收的相关性，屏蔽非相干散射与背景光，提高颜色饱和度；利用热辅助设备组装面积的调变性或热挤压设备的连续性，实现准晶结构色体系的大面积制备；分析材料微观结构与颜色调制规律，明确准晶结构的生色机制，形成准晶结构无角度依存生色理论，指导无角度依存结构生色体系的大面积构建。

准晶结构具有与入射光方向无关的光子禁带，可有效实现颜色的无角度依存显示。本项研究针对准晶结构受背景光干扰导致颜色暗淡、构筑基元间的点接触导致结构稳定性差的关键问题，设计合成背景光自屏蔽基元，构建结构锁定的准晶结构，为长效稳定、颜色可视性强、无角度依存结构生色体系的构建提供理论依据。.项目执行期间，创新设计合成了背景光自屏蔽的结构基元，构建了基于相干散射引起的无角度依存、颜色可视性强、结构稳定的准晶结构生色体系。按照研究计划，成功制备了背景光自吸收的微球、可固化粘结的聚脲与聚丙烯酸酯粘结剂，建立了喷涂、热辅助等扰动组装新途径，构建了基于相干散射引起的无角度依存、颜色可视性强的准晶结构生色锁定体系，实现了对柔性纺织品的着色与多色输出。进一步构建了铁掺杂二氧化锡的背景光自屏蔽反蛋白石结构色基元，与聚硅氧烷复合，获得了颜色可视性强、低角度依存的柔韧结构色复合膜；构建了反蛋白石准晶结构色体系，实现了外界刺激下的图案显示。上述研究为无角度依存准晶结构色体系的构建提供了新的研准晶结构的锁定与长效稳定提供了新方法，为柔性准晶结构色体系在纺织、防伪等领域中的应用提供了新途径。

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