Abstract
In this investigation, the N, O-carboxymethyl chitosan (NOCC) was synthesized. A novel pH-sensitive hydrogel system composed of a water-soluble chitosan derivative (N,O-carboxymethyl chitosan, NOCC)and Human-like collagen (HLC) blended with phosphate was developed for controlling drug delivery and NOCC–HLC microspheres were prepared by the technology of electrostatic droplet generation technique. The release profiles of a model protein drug (bovine serum albumin, BSA) from test hydrogels were studied in simulated gastric and intestinal media.
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