Abstract—In this work, Acrylic acid (AA) and 2-hydroxyethyl methacrylate (HEMA) monomers were directly grafted onto chitosan using ammonium persulfate (APS) as an initiator and methylenebisacrylamide (MBA) as a crosslinking agent under an inert atmosphere. A mechanism for hydrogel formation was proposed and the structure of the product was established using FTIR spectroscopy and scanning electron microscopy. The water absorbency increased with increasing the AA amount in the monomer feed due to formation of polyelectrolyte. Results indicated that the swelling capacity decreased with an increase in the ionic strength of the swelling medium. Furthermore, the swelling of superabsorbing hydrogels was examined in solutions with pH values ranging between 1 and 13. The Chitosan-g-poly(Acrylic acid-co-HEMA) hydrogel exhibited a pH-responsive swelling-deswelling behavior in acidic and alkalin solution.
Index Terms—Synthesis; chitosan; polyacrylic acid;2-hydroxyethyl methacrylate
Department of Chemistry, Science Faculty, Islamic Azad University,Arak Branch, Arak, Iran.
Corresponding author: E-mail: m-sadeghi@iau-arak.ac.ir, Tel : 00988613670017
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Cite: Mohammad Sadeghi, "Synthesis and Swelling Behaviors of graftcopolymer Based on Chitosan-g-poly (AA-co-HEMA)," International Journal of Chemical Engineering and Applications vol. 1, no. 4, pp. 354-358, 2010.
