Swelling Characterization of Nanocomposite Hydrogels of Poly (acrylamide-N-vinylimidazole)

Abstract

In this study, a hydrogel composed of acrylamide (AAm) with N-vinylimidazole (NVI) as co-monomer, with a cross-linker such as N, N` Methylenebisacrylamide and potassium peroxodisulfate as an initiator solution was prepared. Poly (AAm/NVI) hydrogels were synthesized by free radical solution polymerization. Swelling experiments were performed in water at 25°C, gravimetrically. Here, it was of interest to increase the water absorption capacity of AAm hydrogels with add VI. AAm is a highly hydrophilic monomer, and VI monomer is neutral. The one purpose of this study is to combine both monomers in one polymer. In this respect, a series of hydrogels was synthesized by changing the content of AAm and VI. Then, some swelling of these hydrogels was studied in water.