title: Super-hydrophilic silicone hydrogels with interpenetrating poly(2-methacryloyloxyethyl phosphorylcholine) networks.
abstract: We synthesized silicone hydrogels from 2-methacryloyloxyethyl phosphorylcholine (MPC) and bis(trimethylsilyloxy)methylsilylpropyl glycerol methacrylate (SiMA) using two methods: random copolymerization with a small amount of cross-linker (P(SiMA-co-MPC)) and construction of an interpenetration network (IPN) structure composed of cross-linked poly(MPC)(PMPC) chains and cross-linked poly(SiMA)(PSiMA) chains (PSiMA-ipn-PMPC). The polymerization was carried out by photoreaction. The surface hydrophilicity and water absorbability of P(SiMA-co-MPC) increased with an increase in the MPC unit composition. On the other hand, in the case of PSiMA-ipn-PMPC, a super-hydrophilic surface was obtained by the surface enrichment of MPC units. The optical and mechanical properties of PSiMA-ipn-PMPC are suitable for use as a material for preparing contact lenses. In addition, the oxygen permeability of PSiMA-ipn-PMPC remains high because of the PSiMA chains. The MPC units at the surface of the hydrogels reduce protein adsorption effectively. From these results for PSiMA-ipn-PMPC, we confirmed that it has the potential for application to silicone hydrogel contact lenses.
authors.affiliation: Department of Materials Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan.
authors.forename: Takanori
authors.initials: T
authors.lastname: Shimizu
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Goda
authors.forename: Norihiko
authors.initials: N
authors.lastname: Minoura
authors.forename: Madoka
authors.initials: M
authors.lastname: Takai
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ishihara
mesh_terms: D003261:Contact Lenses; D020100:Hydrogels; D008689:Methacrylates; D010100:Oxygen; D010767:Phosphorylcholine / Q000031:analogs & derivatives*; D011109:Polymethacrylic Acids; D011506:Proteins; D017550:Spectroscopy, Fourier Transform Infrared; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D020100:Hydrogels; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011506:Proteins; C115766:poly(2-methacryloyloxyethyl-phosphorylcholine); D010767:Phosphorylcholine; D010100:Oxygen