Preparation and Study of Moth-Eye-Like Micro-Nano Structure Optical Anti-Reflection Coating

Abstract Copolymers were synthesized from acrylate monomers and ladder-shaped polysilsesquioxanes (LPSQ) using free radical polymerization, and the copolymers were coated on polyethylene terephthalate (PET) films by the lift-off impregnation method. The nanosized SiO 2 sols with different particle sizes were prepared by sol-gel method, and then the nanosized SiO 2 sols were coated on the surface modified PET film to construct a moth-eye-like anti-reflection coating by using the layer-by-layer self-assembly method. The structure and composition of LPSQ and modified acrylic resin copolymer were characterized by infrared spectroscopy and X-ray diffraction, and the transmittance/haze tester and UV spectrophotometer were used to test the performance of the anti-reflection coating, which could reach 94.0% compared with 89.2% of the matrix pure PET film. Thermogravimetric analysis showed that the thermal decomposition temperature of the LPSQ-modified copolymer material was higher than that of the pure acrylate copolymer.