Abstract
Gelatin (GEL) and poly (vinyl alcohol) (PVA)-based semi-interpenetrating polymer network (semi-IPN) hydrogels were prepared for cationic dye sorption. Chemically cross-linked copolymer of acrylamide/sodium acrylate (AAm/SA) with PVA and/or GEL were prepared by polymerization of aqueous solution of AAm, and SA using ammonium persulphate/N,N,N’,N’-tetramethylethylenediamine as redox initiating pair in presence of poly(ethylene glycol)diacrylate as cross-linker. FTIR analysis was used for structural characterization. Surface morphology was characterized by SEM. Methyl violet has been used in sorption studies. Water uptake, and dye sorption properties of the cross-linked polymeric systems were investigated as a function of chemical composition of the hydrogels.
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