Imino-chitosan biopolymeric films. Obtaining, self-assembling, surface and antimicrobial properties. (6th March 2015)

• Record Type: Journal Article
• Authors: Marin, Luminita; Ailincai, Daniela; Mares, Mihai; Paslaru, Elena; Cristea, Mariana; Nica, Valentin; Simionescu, Bogdan C.
• Is Part Of: Carbohydrate polymers. Volume 117(2015)
• Page Start: 762
• Page End: 770
• Publication Date: 2015-03-06
• Subjects: Chitosan -- Imine -- Film -- Trans-imination -- Self-assembling -- Antimicrobial; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2014.10.050
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Twelve imino-chitosan biopolymer films were obtained by acid condensation reaction. The biopolymers self-assemble into three-dimensional architectures. The imino-chitosan films have nanostructured surface and moderate wettability. The imino-chitosan films show self-defense properties against common pathogen agents. Abstract: The paper reports the preparation of twelve imino-chitosan biopolymer films by acid condensation of the amino groups of chitosan with various aldehydes, in aqueous medium, followed by slow water removal. FTIR spectroscopy has shown drastic conformation changes of chitosan macromolecular chains – from a stiff coil to a straight one, while wide angle X-ray diffraction evidenced a layered morphology of the biopolymer films. Contact angle and surface free energy determination indicated a higher biocompatibility of the new biopolymers as compared to the chitosan parent, while the microbiological screening demonstrated their self-defense properties against common and virulent pathogen agents. It was concluded that the reversibility of imine forming promotes the self-assembling of imino-chitosan biopolymer films into a lamellar morphology and, on the other hand, the slow release of the antimicrobial aldehyde in the microbiological culture. The obtained results demonstrate that chitosan polyamine is a challenging workbench to functional biodynamic materials.