Abstract
Series of hydrogels based on polyacrylamide and copolymer dextran-graft-polyacrylamide with various cross-linking density and various molecular weight of dextran component were prepared using N,N′-methylene-bis-acrylamide as cross-linking agent. The comparative equilibrium swelling capacity of synthesized hydrogels was studied. The swelling behavior was analyzed as a function of the polymeric composition, cross-linking degree and hydrolysis degree, ionic strength. It was found that cross-linking degree and molecular weight of polysaccharide component determines the internal structure (mesh size) of hydrogels and affects their swelling capacity. A significant increase in the swelling parameters of hydrogels was achieved due to the hydrolysis of amide groups of the polyacrylamide component of hydrogels. It was registered the high sensitivity of swelling capacity of hydrogels towards ionic strength of the external solution. The absorption and desorption of methylene blue in non-hydrolyzed hydrogels were carried out. Hydrogels were characterized by FTIR and SEM methods.
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Nadtoka, O., Virych, P., Kutsevol, N. (2020). Investigation of Swelling Behavior of PAA and D-PAA Hydrogels. In: Fesenko, O., Yatsenko, L. (eds) Nanooptics and Photonics, Nanochemistry and Nanobiotechnology, and Their Applications . Springer Proceedings in Physics, vol 247. Springer, Cham. https://doi.org/10.1007/978-3-030-52268-1_4
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DOI: https://doi.org/10.1007/978-3-030-52268-1_4
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