Zeng Jing, Fan Wen, Jia Kangyu, Tu Shuhua, Wu Limin
Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, Hubei 430062, China.
J Colloid Interface Sci. 2021 Sep;597:306-313. doi: 10.1016/j.jcis.2021.03.175. Epub 2021 Apr 5.
Structural color materials have tremendous applications and been extensively investigated in the past decades. Most of them involve either nanoscale periodic photonic crystal structure or film interference mechanisms. Herein, we report a novel retroreflective structural color film (RSCF) based on a combined effect of interference and total internal reflection (TIR). The RSCF is consisted of a microscale polymer hemisphere array formed on the same polymer matrix. When exposed to white light illumination, the non-hemisphere-side of the film exhibits non-iridescent color under coaxial illumination and observation, and iridescent color under noncoaxial illumination and observation. In contrary, the hemisphere-side of the film does not show any colors regardless of coaxial or noncoaxial illumination and observation. Furthermore, an elastic polyurethane-based RSCF can exhibit dynamically and reversibly changing colors during uniaxial tensile/compressive deformation.
结构色材料具有巨大的应用价值，并且在过去几十年中受到了广泛的研究。它们中的大多数涉及纳米级周期性光子晶体结构或薄膜干涉机制。在此，我们报道了一种基于干涉和全内反射（TIR）联合效应的新型逆向反射结构色薄膜（RSCF）。该RSCF由在同一聚合物基体上形成的微米级聚合物半球阵列组成。当受到白光照射时，薄膜的非半球侧在同轴照明和观察下呈现非虹彩色，而在非同轴照明和观察下呈现虹彩色。相反，无论同轴还是非同轴照明和观察，薄膜的半球侧都不显示任何颜色。此外，一种基于弹性聚氨酯的RSCF在单轴拉伸/压缩变形过程中可以动态且可逆地改变颜色。
