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

Table 2

Equilibrium swelling ratio of AA/Gelatin hydrogels.

Sample codes	Feed composition (AA/Gelatin)	Degree of cross-linking (EGDMA) % W/W	pH of the solution
			1.2	5.5	6.5	7.5
U1	35.00/4.00	0.70	5.48	16.43	29.62	34.58
U2	35.00/5.00	0.70	5.26	14.82	26.81	30.95
U3	35.00/6.00	0.70	4.76	12.88	24.01	27.94
U4	28.00/6.00	0.70	4.22	11.51	22.75	26.18
U5	32.00/6.00	0.70	4.68	14.66	26.66	32.63
U6	36.00/6.00	0.70	5.66	17.27	33.56	38.28
U7	36.00/6.00	0.65	5.52	16.83	33.00	37.21
U8	36.00/6.00	0.75	4.64	12.64	26.43	27.59
U9	36.00/6.00	0.85	4.014	8.48	22.75	24.61