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Title: Laccase/TEMPO-mediated bacterial cellulose functionalization: production of paper-silver nanoparticles composite with antimicrobial activity
Author: Morena, A. Gala
Roncero, M. Blanca
Valenzuela Mayorga, Susana Valeria
Valls Vidal, Cristina
Vidal, Teresa
Pastor Blasco, Francisco I. Javier
Díaz Lucea, Pilar
Martínez Martínez, Josefina
Keywords: Bacteris
Química de la cel·lulosa
Cellulose chemistry
Issue Date: 19-Aug-2019
Publisher: Springer Verlag
Abstract: Bacterial cellulose (BC) was functionalized applying the Laccase/TEMPO oxidative treatment, leading to a five-fold increase of the concentration of carboxyl groups. Paper produced with this cellulose showed improved mechanical properties while maintaining barrier function against water and greases as compared to paper produced with non-oxidized BC. Also, the negative charge provided by the carboxyl groups on functionalized BC was used to generate silver nanoparticles (AgNPs), obtaining a BC paper and Ag composite. The presence of AgNPs in the composites was validated by SEM, EDS and ICP analysis, showing spherical, uniformly sized particles stabilized in the BC nanofibers matrix. Additionally, antimicrobial property of composites containing AgNPs was tested. The results showed the strong antimicrobial activity of the composites against Gram-positive and Gram-negative bacteria and fungi. The generation of Ag nanoparticles in a matrix that combine the physical characteristics of the BC nanofibers with the stiffness and the mechanical properties of paper produced composites that may have applicability in technological and biomedical uses.
Note: Versió postprint del document publicat a:
It is part of: Cellulose, 2019, vol. 26, num. 16, p. 8655-8668
Related resource:
ISSN: 0969-0239
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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