Rapid fabrication of large-scale structurally colored PS@SiO 2 films with enhanced self-cleaning capability
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Rapid fabrication of large-scale structurally colored PS@SiO2 films with enhanced self-cleaning capability Fen Wang , Fuqiang Guo, Yu Xue, Hongjie Luo, Jianfeng Zhu
Received: 24 April 2020 / Revised: 19 August 2020 / Accepted: 23 August 2020 American Coatings Association 2020
Abstract Structural colors are widespread in myriads of natural living organisms measuring from tens to hundreds of nanometers. In recent years, amorphous photonic crystal films have received extensive attention due to their stable color rendering properties. However, the internal structure of the films is easy to be contaminated by liquid. Thus, self-cleaning performance has been considered as one of the main obstacles to the practical application of artificial structural colored films. In order to solve the issues, we used heptadecafluoro1,1,2,2-tetrahydrodacyl trimethoxysilane to modify the structural colored films. The results demonstrated that the modified colored films showed super-hydrophobic (contact angle > 160) and high oleophobic (contact angle > 150) properties. The rapid production of water-resistant and oil-resistant structural color coatings by spraying is significant for expanding their application in outdoor conditions (e.g., acid–base, alkali base, pollution) for a long time.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11998-020-00418-0) contains supplementary material, which is available to authorized users. F. Wang (&), F. Guo, Y. Xue, J. Zhu School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, People’s Republic of China e-mail: [email protected] F. Wang, F. Guo, Y. Xue, J. Zhu School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, People’s Republic of China H. Luo School of Materials Science and Engineering, Shanghai University, Shanghai 200444, People’s Republic of China
Keywords Structural color, PS@SiO2 coating, Surface modification, Optical properties, Super-hydrophobicity, High oleophobicity
Introduction Today’s most widely used chemical pigments are composed of organic chemicals in industry, and they can easily fade with time or exposure to sunlight.1–4 In the natural world, quite a few plants and animals exhibit structural colors,5 such as beetles6,7 and bird’s feathers,8,9 that show rainbow-like iridescence. Unlike chemical colors obtained through the absorption of light, these colors are generated by the physical interaction between light and periodically arranged microstructure in a length scale comparable to the visible light wavelength, which is usually called structural colors.10 There are generally two types of structural colors: iridescent and non-iridescent.11,12 Iridescent structural colors can vary in accordance with the angle of view. This hinders their use for certain areas where a wide view angle is required, such as display devices and optical devices.1
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