Zirconia nanoparticles were widely used as filler in order to get high refractive index layer. However, dispersion of nanoparticles is difficult due to their agglomeration in solvent. In this study, the dispersibility of the zirconia suspension is promoted by controlling the steric hindrance and electrostatic interactions through the adsorption of PEI according to alkali treatment time. Also, to induce improved dispersibility on suspension, we changed the dispersion conditions variously and fabricated an ink formulation method for the coating layer. Zirconia suspension was characterized by dynamic light scattering (DLS), Zeta potential measurement, Transmission Electron Microscope (TEM) and FT-IR. We were able to confirm that good dispersion of zirconia suspension by alkali treatment and PEI led to high refractive index.

• 조충희(충남대학교 고분자공학과 한국화학연구원 화학소재솔루션센터) | Choong Hee Jo
• 함동석(한국화학연구원 화학소재솔루션센터) | Dong Seok Ham
• 이재흥(한국화학연구원 화학소재솔루션센터) | Jae Heung Lee
• 류주환(충남대학교 고분자공학과) | Juwhan Ryu
• 이기윤(충남대학교 고분자공학과) | Kee-Yoon Lee Corresponding author
• 조성근(한국화학연구원 화학소재솔루션센터) | Keun Cho Corresponding author.