Healable Omnidirectional Antireflection Coatings Inspired by Dragonfly Wings

• Main Authors: Hsin-Yu Tseng, 曾心瑀
• Other Authors: 楊宏達
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/8c354c

碩士 === 國立中興大學 === 化學工程學系所 === 107 === In this study, large-area and single-layer non-closed stacks silica colloidal crystal/Shape Memory Polymer composite were fabricated on polyethylene terephthalate (PET) substrates by spin coating technology using 90 nm, 180 nm, and 240 nm silica colloidal particles. The silica colloidal crystal/Shape Memory Polymer composite is etched with the reactive ion etching, and the dragonfly wing inspired structure with different sizes can be fabricated on the PET substrate by different etching time. The graded refractive index, by measuring the optical properties, shows that the dragonfly wing inspired structure is in the visible wavelength range, which can reduce the reflection of the larger light incident angle and improve the transmission. In addition, by studying the characteristics of shape memory polymer, deionized water was applied to the dragonfly wing inspired structure after etching, and the structure collapsed and aggregated, and its transmission decreased from 91.5% to 73.8%, and then acetone solution was applied. The dragonfly wing inspired structure was recovered, and its transmission raised from 73.8% to 91.2%.So, it shows the structure has property of shape memory. Therefore, it is a structure with property of omnidirectional anti-reflection and shape memory.