Aqueous Modification of Chitosan with Itaconic Acid to Produce Strong Oxygen Barrier Film.

ABSTRACT: In this study, the chemical modification of chitosan using itaconic acid as a natural-based unsaturated dicarboxylic acid was investigated. In an aqueous environment, the amine group of chitosan reacts with itaconic acid to produce a chitosan derivative with pyrrolidone-4-carboxylic acid group. On the basis of the elemental analysis, 15% of the amine groups of chitosan reacted, thus creating modified chitosan with amine and carboxylic acid functionalities. Due to the presence of amine and carboxylic acid groups, the surface charge properties of the chitosan were notably altered after itaconic acid modification. In an aqueous solution, the modified chitosan exhibited zwitterionic properties, being cationic at low pH and turning anionic when the pH was increased over 6.5, whereas the origina

SUBMITTER: Sirvio JA 

PROVIDER: S-EPMC8382240 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature