pvp-i can be loaded into hydrogels, which can be based on carboxymethyl cellulose (cmc), poly(vinyl alcohol) (pva), and gelatin, or on crosslinked polyacrylamide. these hydrogels can be used for wound dressing. the rate of release of the iodine in the pvp-i is heavily dependent on the hydrogel composition: it increases with more cmc/pva and decreases with more gelatin.