Center for Material Design Science, School of Integrated Design Engineering, Graduate School of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama , Kanagawa 223-8522 , Japan.
ACS Appl Mater Interfaces. 2018 Jul 5;10(26):22731-22738. doi: 10.1021/acsami.8b05887. Epub 2018 Jun 21.
Bioinspired photonic crystals that can be used to precisely control the optical reflection of light of a specific wavelength by varying their thickness and refractive index have attracted much attention. Among them, photonic crystals that can reflect near-infrared light have attracted attention owing to their potential applications including window coating with heat-shielding property. However, photonic crystals with an optical function in practical use sometimes lose their function because of contamination. Here, a near-infrared reflection coating film with self-healing omniphobicity was designed and prepared by layer-by-layer assembly and an instant liquid phase omniphobization method. The fabricated films had a self-cleaning thermal shielding effect. The films were visually transparent and could be used to control the reflection peak of the near-infrared light (range of 700-1000 nm) by adjusting the film thickness, which prevented the increase in temperature in enclosed spaces. After omniphobization, the films had self-cleaning properties of their surface and retained their optical properties. These functions are promising for practical application on windows as heat-shielding.
受生物启发的光子晶体可以通过改变其厚度和折射率来精确控制特定波长光的光学反射，因此受到了广泛关注。在这些光子晶体中，能够反射近红外光的光子晶体由于其潜在的应用而受到关注，包括具有隔热性能的窗涂层。然而，在实际应用中具有光学功能的光子晶体有时会因为受到污染而失去其功能。在这里，通过层层组装和即时液相斥水法设计并制备了具有自修复全疏水性的近红外反射涂层膜。所制备的薄膜具有自清洁热屏蔽效果。该薄膜具有良好的透光性，可以通过调节薄膜厚度来控制近红外光（700-1000nm 波段）的反射峰，从而防止封闭空间内的温度升高。经过斥水处理后，薄膜具有表面自清洁性能，并且保留了其光学性能。这些功能有望在窗户的隔热方面得到实际应用。
