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KMID : 1011420140190030315
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Journal of Korean Ophthalmic Optics Society
2014 Volume.19 No. 3 p.315 ~ p.322
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Characterization of Hydrogel Tinted Contact Lens Containing 4-iodoaniline using Titanium Silicon Oxide Nanoparticles as Additive
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Cho Seon-Ahr
Sung A-Young
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Abstract
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Purpose: The physical and optical characteristics of hydrophilic tinted contact lens containing titanium silicon oxide nanoparticles and the basic hydrogel contact lens material containing 4-iodoaniline were examined. In this study, the utility of titanium silicon oxide nanoparticles as a UV-blocking material for ophthalmologic devices were investigated by measuring the UV transmittance of the produced polymer. Also, titanium silicon oxide nanoparticles only without the addition of 4-iodoaniline in primary contact lens materials by copolymerizing two groups were compared.
Methods: For manufacturing hydrogel lens, HEMA, MA, MMA, 4-iodoaniline and a cross-linker EGDMA were copolymerized in the presence of AIBN as an initiator. Also, the titanium silicon oxide nanoparticles was used as additive. After polymerization the physical properties such as water content, refractive index, contact angle and spectral transmittance of produced contact lenses were measured.
Results: Measurement of the physical properties of the copolymerized material showed that the water content, refractive
index, UV-B transmittance and contact angle were in the range of 35.01~38.60%, 1.4350~1.4418, 34.15~57.25o and 1.0~10.0%, respectively. Titanium silicon oxide nanoparticles is not used as an additive in the experimental group, the results of the measurement showed that the water content, refractive index, contan angle and UV-B transmittance of the hydrogel lens polymer was 34.00~36.80%, 1.4378~1.4420, 40.15~60.16o and 1.8~25.0%, respectively.
Conclusions: Also, the transmittance for UV light was reduced significantly in combinations containing titanium oxide nanoparticles.
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KEYWORD
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Titanium silicon oxide nanoparticles, 4-iodoaniline, Visible transmittances, UV-blocking, Refractive index
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