近赤外光応答型粒子間光架橋性ZrO₂スラリーの設計

抄録

Interparticle photo-cross-linkable ZrO₂ slurry which can be photo-cured by near-infrared (nIR) light irradiation was successfully designed by mixing small amounts of multifunctional acrylate (MA), photo radical initiator, and nIR-absorbing dye into a concentrated ZrO₂ slurry stabilized by a partial complex of polyethyleneimine and oleic acid. The reaction of MA to PEI-OA modified ZrO₂ particles induced by nIR light irradiation was confirmed through the FTIR and TGA analysis of ZrO₂ particles collected from the slurry before and after light irradiation as well as the microstructure investigation of photocured bodies using FE-SEM. Compared to the ultraviolet light-responsive interparticle photo-cross-linkable ZrO₂ slurries, the designed nIR-responsive slurry found to possess large curing depth which enabled the shaping of complex structured ZrO₂ green bodies through a simple photocuring process in a mold.