Preparation and Characterization of High Functional Ophthalmic Lens Material Containing Acrylic Formation Isocyanate Group with Carbon Nanoparticles.

This research was conducted to produce the high functional hydrogel ophthalmic lens containing iso-cyanate group and nanoparticles. IsoMA (2-Isocyanatoethyl methacrylate) and carbon nanoparticles were used as additives for the basic combination including HEMA (2-hydroxyethyl methacrylate), MA (methacrylic acid), and MMA (methyl methacrylate). And also, the materials were copolymerized with EGDMA (ethylene glycol dimethacrylate) as the cross-linking agent and AIBN (azobisisobutyronitrile) as the initiator. Measurement of the physical characteristics of the produced material showed that the refractive index was 1.4027~1.4446, water content 31.13~44.01%, contact angle 43.99~65.67°, visible light transmittance 26.17~92.13%, and tensile strength 0.0652~0.2528 kgf. The breaking strength were in the range of 0.0872~0.1851 kgf. These results showed the decrease of contact angle and increase of water content by the addition of IsoMA and carbon nanoparticles and that showing both additives made synergy effect of wettability. As a result of the absorbance measurement, no significant difference was observed in all the samples, so it can be judged that the stabilization of nanoparticles in the polymer was maintained. Therefore, these materials considered to satisfy the basic requirements of ophthalmic lenses with high performance of tensile strength, breaking strength and wettability.