Preparation and Characterization of Ophthalmic Polymer Containing Pyridine Group and Platinum Nanoparticles with Initiator Behavior Using Photo and Thermal Polymerization

To fabricate hydrophilic ophthalmic lenses, HEMA, MMA, and AA were mixed as basic monomers, and EGDMA, a cross-linking agent, was added to make a basic combination. To investigate optimal compatibility and conditions of photo polymerization and thermal polymerization, hydrogel lenses were also fabricated by using 2H2M and 2D2P as photo initiators and AIBN and AIPH as thermal initiators. The properties of the lenses were subsequently compared. Each sample was mixed by adding the additive, 3-hydroxypyridine, at a ratio of 1 to 10% and stirred for about 30 minutes using a stirrer. When 3-hydroxypyridine was used as an additive for improving functionality, the water content increased, and the refractive index decreased. By measuring the optical properties, the UV blocking effect was shown to have improved more 3-hydroxypyridine was added. Also, when platinum nanoparticles were used as an additive, they were found to be uniformly distributed on the produced lens. They did not show a great change in the water content and refractive index of the lens.