New cellulose-polyacrylamide hydrogels containing nano-ceria as new promising nanocomposite materials for biomedical applications

摘要: A group of new hydrogel materials combining high physical properties and pronounced antibacterial activity has been developed. These are composite hydrogels" cellulose-polyacrylamide" based on cellulose matrices of two types: bacterial or regenerated plant cellulose. To form biologically active materials, a method of introducing ceria nanoparticles with sizes less than 5 nm was elaborated. The developed technology allows to obtain hydrogels with the content of ceria (in swollen material) up to 0.4–0.5 wt.%. Variations of the ratio of gel components concentrations, type of matrix cellulose and synthesis conditions allow to change the complex of mechanical properties of the material within a wide range, in particular, to obtain both soft, low-modular nanocomposites and hydrogels with record high rigidity. Significant differences in mechanical properties of hydrogels based on different types of cellulose fully correlate …