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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 28: Poster III

CPP 28.46: Poster

Wednesday, March 20, 2024, 11:30–13:30, Poster C

Behaviour of metal-containing films of chitosan-based films in aqueous solutions — •Snegireva Anastasia — Moscow, Russia

The behaviour of biologically active coating materials in aqueous solutions is an important feature for determining the area of application and the possibility of use as a drug. The dynamics of the change in these parameters over time under standard conditions for storing the materials determines one of the parameters for the shelf life of the foils obtained. Films containing iridium and rhodium were produced by the solution casting method. There are three types of films: chitosan-based, chitosan-gelatin-based and chitosan-agar-based. The degree and the swelling constant were determined both in aqueous solution and in salt buffer solution with a pH value of 7.2, which corresponds to the ion set and the acidity of the organism's biological media. The addition of metal cations to the films changes the character of the solution. Matrices that do not contain salt swell without restriction in both aqueous and buffer solutions. As the metal concentration in the foils increases, the degree of swelling decreases. The swelling rate constant increases. The ability to absorb moisture during storage under standard conditions decreases over a period of two months, which indicates an increase in the strength of the materials.

Keywords: Chitosan; Thin Films; swelling