Abstract
The surface modified hydrophilic zinc sulfide nano powder was prepared by hydrothermal method, and the corresponding zinc sulfide/polyurethane organic-inorganic composite transparent coating via in-situ polymerization. The structure of ZnS Nanoparticles and organic-inorganic composite coating were characterized by Infrared Spectroscopy, X-Ray Diffraction, Laser Particle Size Analyzer and Scanning Electron Microscopy. The optical properties were measured by Ultraviolet-Visible spectrophotometer and ellipsometry. The results show that the monodisperse hydrophilic nano zinc sulfide powder with a particle size of about 70 nm can be obtained by thioglycolic acid (TGA) modification, which has good compatibility with waterborne polyurethane. Nano zinc sulfide increased the refractive index of the coating significantly and the refractive index of the coatings could be controlled in the region of 1.46–1.71 organic-inorganic composite coating by adding ZnS. When the amount of nano ZnS added was 30%, the refractive index of the hybrid coating can reach 1.71, and the transmittance was more than 90%. The cured coatings were smooth and no agglomeration between nano ZnS particles could be found. After application on the surfaces of resin lens, the coatings presented better impact resistance, which indicated that the coating has application prospects in the field of fine processing of lens’ surfaces.
Highlights
Resin materials are widely used in optics, aviation, transportation, construction and other fields
The hydrophilic nano-Zinc sulfide (ZnS) powder was prepared via one-step homogeneous precipitation with thioglycolic acid (TGA) as modifier
The dispersed uniformly ZnS/polyurethane composite impact resistant coating solution was prepared via in-situ polymerization
Summary
Resin materials are widely used in optics, aviation, transportation, construction and other fields. Because of their light weight and excellent optical performance, high refractive resin lenses are more and more popular. In order to improve the service life of the optical resin lens, a functional coating on the surface has become a common method adopted by lens enterprises [1,2]. An organic-inorganic composite functional coating with both hardness and flexibility can be prepared. Clément Sanchez et al [3] have studied organic-inorganic hybrid materials in detail, including their classification, composition, mechanism and wide application in optics, electronics, biology, medicine, for example, as membranes and separation devices, functional smart coatings, fuel and solar cells, sensors, etc. Qian et al [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
