Synthesis and properties of oxygen permeable hydrogels based on copolymers of dimethylacrylamide and fluoro sulfonamide (meth)acrylates
- 9 March 2000
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 10 (4) , 859-865
- https://doi.org/10.1039/a908656k
Abstract
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 × 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.Keywords
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