121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-465
Subject Polymerization and Preparation of High Strength Ophthalmic Lens Containing Isocyanate Group with Carbon Nanoparticles
Authors Min-Jae Lee, A-Young Sung*
Department of Optometry & Vision Science, Daegu Catholic University, Korea
Abstract This research was conducted to produce the high strength hydrogel ophthalmic lens containing isocyanate group with nanoparticles. 2-Isocyanatoethyl methacrylate and hexamethylene diisocyanate with carbon nanoparticles were used as additives for the basic combination of HEMA (2-hydroxyethyl methacrylate), MA (methacrylic acid), and MMA (methyl methacrylate), and the materials were copolymerized with EGDMA (ethylene glycol dimethacrylate) as the cross-linking agent and AIBN as the initiator. Measurement of the physical characteristics of the produced material showed that the refractive index is 1.4027~1.4600, water content 25.21~44.01%, contact angle 43.99~72.94°, visible light transmittance 26.71~92.13%, and tensile strength 0.0652~0.2528kgf and breaking strength were 0.0872~0.2825kgf. The results showed an increase of refractive index while the addition of 2-isocyanatoethyl methacrylate with carbon nanoparticle decreased the contact angle and that showing both additives made synergy effect of wettability. In case of copolymer with hexamethylene diisocyanate, the results showed increase of light transmittance as the increasing ratio of additives. Furthermore, the tensile strength was highest when the addition ratio of isocyanate group was 3%(wt), and also, the breaking strength was highest when the addition ratio of isocyanate group was 5%(wt). 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 can be used for ophthalmic lenses with high performance of wettability, ultraviolet ray blocking effect, tensile strength and breaking strength if they are used at an appropriate ratio.
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