Synthesis and properties of oxygen permeable hydrogels based on copolymers of dimethylacrylamide and fluoro sulfonamide (meth)acrylates

Lisa M. Muratore, Sang Hoon Lee, Thomas P. Davis

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Xerogels have been synthesized from copolymers of dimethylacrylamide and 2-(N-alkylperfluoro-octanesulfonamido)ethyl (meth)acrylates. The xerogels exhibit transparency despite the fact that DSC analyses reveal heterogeneous structures exhibiting two glass transition temperatures. The DSC results are indicative of a morphology made up of domains corresponding to a rigid backbone and flexible perfluorinated side-chains. On swelling in saline hydrogels were formed. The resulting materials maintain transparency, display high water contents (40-80 wt%) and moduli comparable with existing commercial hydrogel materials. The oxygen permeabilities (Dk x 1010) of the gels range from 34 to 52 (ml O2) mm cm-2 s-1 mmHg-1. These Dk values are high in comparison with those of conventional hydrogels and are indicative of a heterogeneous hydrogel structure facilitating oxygen transmission through both the aqueous phase and via a fluorine-rich co- continuous polymeric phase.

Original languageEnglish
Pages (from-to)859-865
Number of pages7
JournalJournal of Materials Chemistry
Issue number4
Publication statusPublished - 1 Jan 2000
Externally publishedYes

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