Highly Porous pH-Responsive Carboxymethyl Chitosan-Grafted-Poly (Acrylic Acid) Based Smart Hydrogels for 5-Fluorouracil Controlled Delivery and Colon Targeting

Figure 11

SEM micrographs of Poly (CMCS-g-AA) hydrogels. Surface morphology of blank hydrogel sample (a). Surface morphology of drug-loaded hydrogel sample (b). Cross-sectional morphology of blank hydrogel sample (c). Cross-sectional morphology of drug-loaded hydrogel sample (d).

(a)

(b)

(c)

(d)