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

Figure 10

FTIR spectra of (A) 5-FU, (B) AA, (C) CMCS, and (D) Poly (CMCS-g-AA) hydrogel (unloaded).