Formation of macroporous hydrogel foam based on sodium alginate

The features of forming macroporous hydrogel foam during the foaming of aqueous sodium alginate solutions with simultaneous cross-linking of sodium alginate macromolecules by calcium ions are considered. Foaming is achieved through the release of carbon dioxide from the hydrogel composition due to the interaction of carbonates with carboxyl groups. The study outlines the most significant factors influencing the formation process of macroporous hydrogel foam.