Synthesis and Characterization of Chemically Cross-Linked Acrylic Acid/Gelatin Hydrogels: Effect of pH and Composition on Swelling and Drug Release

Table 9

Effect of degree of cross-linking on drug release mechanism of AA/Gelatin hydrogels in solutions of different pH values.

Sample codes	EGDMA contents (%)	pH	Release exponent ()		Order of release
U7	0.65	1.2	0.6242	0.981	Non-Fickian
		5.5	0.8345	0.996	Non-Fickian
		7.5	0.7752	0.984	Non-Fickian
U8	0.75	1.2	0.7529	0.978	Non-Fickian
		5.5	0.8673	0.990	Non-Fickian
		7.5	0.7868	0.987	Non-Fickian
U9	0.85	1.2	0.7591	0.992	Non-Fickian
		5.5	0.8765	0.994	Non-Fickian
		7.5	0.7847	0.979	Non-Fickian