Synthesize and Characterization of Hydrogel by Polyacrylamide

Polyacrylamide hydrogels were prepared with an exothermic free radical polymerization method With n,n’- methelene bisacrilamide as cross linker & AIBN as initiator. The rate of Hydrogel swelling in metal cationic solutions with different cations and pH was investigated. Then three kinds of hydrogel with different amount of cross linker were prepared and their swelling behavior were investigated The results showed that; variation of pH had no effect on hydrogel swelling, but the complex hydrogels had maximum swelling in alkaline pH. With increasing of cations concentration in solution and cross linker amount in hydrogel the rate of swelling was decreased.