Ultraviolet (UV)-cured organic-inorganic hybrid materials with low refractive index (<1.40) were prepared for multilayer film applications. The hybrid materials comprised hollow silica nanoparticles modified with trialkoxysilane-derived reactive coupling agents. The average number of modifier molecules on the surface of a hollow silica nanoparticle was 0.47 molecule/nm2. The modified hollow silica nanoparticles were homogeneously mixed with UV-curable resins, which induced radical photopolymerization. A UV-cured film containing 60 wt% hollow silica nanoparticles showed a transmittance 99 > of% in the visible and nearinfrared regions and a low refractive index of 1.372 at 633 nm. A TiO2- containing UV-cured hybrid film with high refractive index was easily coated on the UV-cured low-refractive-index film.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials