Abstract
The three-dimensional structure of hydrogels plays a leading role in several areas of applications. The hydrogels are more and more used as systems of immobilized and controlled release of biomolecules in biotechnology and bio-pharmacy industries. To improve protein adsorption capacity in poly(acrylamide) hydrogels, maleic acid co-monomer was included into the reaction mixture during hydrogel synthesis. So, hydrogels of poly(acrylamide) and its copolymers with diprotic maleic acid were prepared by copolymerization and chemical crosslinking with N,N′-methylene bis-acrylamide. Swelling behavior in distilled water, in physiological saline and in bovine serum albumin (BSA) solutions was studied. Influence of initial BSA concentration on hydrogel swelling and BSA adsorption was investigated. The high amount of maleic acid present in the hydrogels has a significant effect on the swelling behavior and BSA adsorption. Results showed that the pH sensitivity of hydrogels resulted in the high amount of adsorbed BSA. The adsorption isotherms were described by Langmuir and Freundlich models. The thermodynamic parameter (ΔG 0ads ) was determined for all obtained hydrogels. We demonstrated the favorable character and reversibility of the BSA adsorption process.
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Angar, NE., Aliouche, D. An enhanced immobilization of BSA biomolecule on anionic hydrogels: swelling and adsorption modeling. Chem. Pap. 71, 1389–1397 (2017). https://doi.org/10.1007/s11696-017-0129-4
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DOI: https://doi.org/10.1007/s11696-017-0129-4