Nanoclay Reinforced Ternary Blends Based on Biodegradable Polymers for Drug Delivery Application

Figure 8

The swelling ratio for CS-PVA-PEG nanocomposite formulations in (a) hydrochloric acid-pH 1.2, (b) sodium acetate-pH 4.5, and (c) phosphate-pH 6.8 buffer solutions.

(a)

(b)

(c)