Polyelectrolyte Complexation versus Ionotropic Gelation for Chitosan-Based Hydrogels with Carboxymethylcellulose, Carboxymethyl Starch, and Alginic Acid

Figure 4

Optical micrographs of a hydrogel sample made by polyelectrolyte complexation of CS 0.016% w/v over CMC 0.8% w/v. Scale 50x.