Title:
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Laccase/TEMPO-mediated bacterial cellulose functionalization: production of paper-silver nanoparticles composite with antimicrobial activity
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Author:
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Morena Gatius, Ángela Gala; Roncero Vivero, María Blanca; Valenzuela, Susana V.; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Javier Pastor, F.I.; Diaz Lucea, M. Pilar; Martínez Martínez, Josefina
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Other authors:
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Universitat Politècnica de Catalunya. Doctorat en Polímers i Biopolímers; Universitat Politècnica de Catalunya. Departament d'Expressió Gràfica a l'Enginyeria; Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera |
Abstract:
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“This is a post-peer-review, pre-copyedit version of an article published in Cellulose. The final authenticated version is available online at: https://doi.org/10.1007/s10570-019-02678-5 |
Abstract:
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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 |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria paperera -Plant fibers -Wood-pulp -Biotechnology -Bacterial cellulose oxidation -Laccase -Bacterial cellulose paper -Nanocomposite -Silver nanoparticle -Antimicrobial activity. -Fibres de cel·lulosa -Fibres vegetals -Pasta de paper -Biotecnologia |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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