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2020-03-12

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/163727

Bacterial Cellulose-Chitosan paper with antimicrobial and antioxidant activities

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Recurs relacionat

https://doi.org/10.1021/acs.biomac.0c00127

Resum

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.

Matèries

Química de la cel·lulosa, Microbiologia, Fabricació del paper

Matèries (anglès)

Cellulose chemistry, Microbiology, Papermaking

Citació

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Articles publicats en revistes (Genètica, Microbiologia i Estadística)

Citació

CABAÑAS ROMERO, Lourdes Verónica, et al. Bacterial Cellulose-Chitosan paper with antimicrobial and antioxidant activities. Biomacromolecules. 2020. Vol. 21, num. 4, pags. 1568-1577. ISSN 1525-7797. [consulted: 17 of August of 2026]. Available at: https://hdl.handle.net/2445/163727

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