Authors: Song, Minhyeon; Shin, Young Hwan; Kwon, Younghwan

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 10, October 2010 , pp. 6934-6938(5)

Publisher: American Scientific Publishers

Abstract:

Siloxane-containing hybrid hydrogels, coupled with optical transparency and moderate water content, have the advantage of a high oxygen permeability which gives rise to useful characteristics for extended wear contact lenses. To synthesize these hybrid hydrogels, free radical copolymerization of hydrophobic TRIS monomer/PDMS macromer with a hydrophilic monomer in a confined mold was studied. It proved that microphase separation of the resulting hybrid hydrogels, caused by inherent incompatibility between hydrophobic and hydrophilic monomers, could be controlled by either the hydrophobic/hydrophilic balance or molecular weight of PDMS macromer in the formulations, resulting in high optical transmittance (>90%) at 400 nm. The oxygen permeability of the hybrid hydrogels at optimized formulations was also obtained as high as 83 barrers.

Keywords: HYDROGELS; SILOXANE; OXYGEN PERMEABILITY; OPTICAL TRANSPARENCY

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2010.2984

Publication date: 2010-10-01

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