Dual-functional transparent adhesive films with modified titanium dioxide nanoparticles for UV protection and wide viewing

Abstract

A new type of dual-functional optically clear adhesive (OCA) with UV protection and wide viewing capabilities was fabricated using TiO₂ nanoparticles. UV-visible spectroscopy was used to determine the transmittances of OCA films, and a laser oscilloscope and a bar-type LED lamp were used for light-diffusion studies. Modified TiO₂ nanoparticles with core-shell structures have different refractive indices to the unmodified particles and exhibit improved UV protection and light-scattering abilities. Therefore, dual-functional OCAs, rather than normal OCAs, help to protect light-emitting modules or the naked eye, and images emitted from such modules are observed more clearly from a variety of angles.

Keywords:

• Nanoparticle
• optically clear adhesive
• titanium dioxide
• UV protection
• wide viewing

Acknowledgments

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2018R1A5A1024127).