Abstract
A novel super absorbent polymer was prepared by graft copolymerization of 4-vinyl pyridine (4VP) onto the chains of carboxymethyl chitosan in aqueous solution using potassium persulphate (KPS) as initiator. The effect of monomer and initiator concentration, reaction temperature, and time on the grafting yield has been investigated. The maximum grafting yield was achieved at [KPS] = 4 × 10−2 mol/L, [M] = 2.5 mol/L at reaction temperature = 60 °C within reaction time = 3 h. The molecular structure of the graft copolymer was confirmed by FTIR, surface morphology before and after the polymerization was examined by SEM. Different analyses were done for the graft copolymer such as X-ray diffraction, solubility tests, and thermal analysis. Different applications were done on the graft copolymer such as swell ability in different pH solutions, dye, and metal uptake.
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The authors are much thankful to GRCF (Graduate research challenge fund) of Faculty of Science-Cairo University for facilitating the purchase of chemicals and for making the required analyses of the present work.
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Sabaa, M.W., Mohamed, N.A., Mohamed, R.R. et al. Chemically induced graft copolymerization of 4-vinyl pyridine onto carboxymethyl chitosan. Polym. Bull. 67, 693–707 (2011). https://doi.org/10.1007/s00289-011-0461-8
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DOI: https://doi.org/10.1007/s00289-011-0461-8