Department of Specialty Chemicals, Division of Specialty and Bio-Based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan44412, Republic of Korea.
School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu41566, Republic of Korea.
ACS Appl Mater Interfaces. 2023 Feb 15;15(6):8510-8520. doi: 10.1021/acsami.2c21058. Epub 2023 Feb 1.
Recently, self-healing materials have evolved to recover specific functions such as electronic, magnetic, acoustic, structural or hierarchical, and biological properties. In particular, the development of self-healing protection coatings that can be applied to lens components in vision systems such as augmented reality glasses, actuators, and image and time-of-flight sensors has received intensive attention from the industry. In the present study, we designed polythiourethane dynamic networks containing a photothermal -butyl-substituted diimmonium borate dye to demonstrate their potential applications in self-healing protection coatings for the optical components of vision systems. The optimized self-healing coating exhibited a high transmittance (∼95% in the visible-light region), tunable refractive index (up to 1.6), a moderate Abbe number (∼35), and high surface hardness (>200 MPa). When subjected to near-infrared (NIR) radiation (1064 nm), the surface temperature of the coating increased to 75 °C via the photothermal effect and self-healing of the scratched coatings occurred via a dynamic thiourethane exchange reaction. The coating was applied to a lens protector, and its self-healing performance was demonstrated. The light signal distorted by the scratched surface of the coating was perfectly restored after NIR-induced self-healing. The photoinduced self-healing process can also autonomously occur under sunlight with low energy consumption.
最近，自修复材料已经发展到可以恢复特定的功能，如电子、磁性、声学、结构或分层和生物特性。特别是，自修复保护涂层的发展，可应用于增强现实眼镜、执行器和图像和飞行时间传感器等视觉系统中的透镜组件，已经受到业界的广泛关注。在本研究中，我们设计了含有光热-丁基取代二铵硼酸盐染料的聚硫代氨酯动态网络，以证明它们在视觉系统光学元件用自修复保护涂层中的潜在应用。优化后的自修复涂层表现出高透光率（可见光区约为 95%）、可调折射率（高达 1.6）、中等的阿贝数（约 35）和高表面硬度（>200 MPa）。当受到近红外（NIR）辐射（1064nm）时，涂层的表面温度通过光热效应升高到 75°C，并且通过动态硫脲交换反应，划伤的涂层发生自修复。该涂层被应用于透镜保护器，并展示了其自修复性能。划伤的涂层表面引起的光信号失真在 NIR 诱导的自修复后得到了完美的恢复。光诱导的自修复过程也可以在低能耗的阳光下自主发生。
