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Title: Bacterial Cellulose-Chitosan paper with antimicrobial and antioxidant activities
Author: Cabañas-Romero, L. Veronica.
Valls Vidal, Cristina
Valenzuela Mayorga, Susana Valeria
Roncero, M. Blanca
Pastor Blasco, Francisco I. Javier
Díaz Lucea, Pilar
Martínez Martínez, Josefina
Keywords: Química de la cel·lulosa
Fabricació del paper
Cellulose chemistry
Issue Date: 12-Mar-2020
Publisher: American Chemical Society
Abstract: The production of paper-based bacterial cellulose-chitosan (BC-Ch) nanocomposites was accomplished following two different approaches. In the first, BC paper sheets were produced and then immersed in an aqueous solution of chitosan (BC-ChI); in the second, BC pulp was impregnated with chitosan prior to the production of paper sheets (BC-ChM). BC-Ch nanocomposites were investigated in terms of physical characteristics, antimicrobial and antioxidant properties, and the ability to inhibit the formation of biofilms on their surface. The two types of BC-Ch nanocomposites maintained the hydrophobic character, the air barrier properties, and the high crystallinity of the BC paper. However, BC-ChI showed a surface with a denser fiber network and with smaller pores than those of BC-ChM. Only 5% of the chitosan leached from the BC-Ch nanocomposites after 96 h of incubation in an aqueous medium, indicating that it was well retained by the BC paper matrix. BC-Ch nanocomposites displayed antimicrobial activity, inhibiting growth of and having a killing effect against bacteria Staphylococcus aureus and Pseudomonas aeruginosa and yeast Candida albicans. Moreover, BC-Ch papers showed activity against the formation of a biofilm on their surface. The incorporation of chitosan increased the antioxidant activity of the BC paper. Paper-based BC-Ch nanocomposites combined the physical properties of BC paper and the antimicrobial, antibiofilm, and antioxidant activities of chitosan.
Note: Versió postprint del document publicat a:
It is part of: Biomacromolecules, 2020, vol. 21, num. 4, p. 1568-1577
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ISSN: 1525-7797
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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