Aqueous solutions of glycolic, propionic, or lactic acid in substitution of acetic acid to prepare chitosan dispersions: a study based on rheological and physicochemical properties.

ABSTRACT: Chitosan (CH) is a biopolymer derived from chitin, which is the second most abundant polysaccharide in nature, after cellulose. Their functional groups -NH₂ and -OH can form intermolecular interactions with water and other molecules, enabling a variety of applications for CH. -NH₂ groups become protonated in acidic solutions, causing an increase in electrostatic repulsion between CH chains, which facilitates their dispersion in aqueous media. Aqueous solutions of acetic acid and/or acetates buffers have been used to disperse CH, but may not be adequate for technological applications, espeacially because of the strong flavor this acid confers to formulations. In this study, 0.125; 0.250; 0.500; 0.750 and 1.000 g (100 g)^-1 CH dispersions were prepared in acid

SUBMITTER: Soares LS 

PROVIDER: S-EPMC8021676 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature