Because of limitations of oral drug delivery into the human body, there is a great interest in development of new drug delivery systems. Hydrogels show great potential in this field because of their similarity with human tissue and their ability to slowly release drug into surrounding medium. In our research we studied effect of different parameters on release rate of proteins from alginate and TEMPO oxidized nanocellulose hydrogels. Those two were chosen because of their structural and rheological properties as well as their biocompatibility, non toxicity and ease of preparation. We mostly observed the effect of crosslinking density on release rate, as well as effects of ionic power of release medium and temperature of release medium. We also observed if difference in surface charge between hydrogel and protein surface would affect the release rate. Based on our result we developed simple empirical model for predicting release rate from similar systems.
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