Antioxidant and antimicrobial methylcellulose films containing Lippia alba extract and silver nanoparticles

•Silver nanoparticles (AgNPs) were biosynthesized using Lippia alba extract.•Methylcellulose films containing AgNPs showed superior antioxidant activity.•Increase in the elasticity of methylcellulose films containing AgNPs was observed.•Methylcellulose films containing the AgNPs presented antimicrob...

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Bibliographic Details
Published in:Carbohydrate polymers 2018-07, Vol.192, p.37-43
Main Authors: Nunes, Michael Ramos, de Souza Maguerroski Castilho, Mércia, de Lima Veeck, Ana Paula, da Rosa, Cleonice Gonçalves, Noronha, Carolina Montanheiro, Maciel, Matheus V.O.B., Barreto, Pedro Manique
Format: Article
Language:English
Subjects:
Active packaging
Anti-Infective Agents - chemistry
Antimicrobial films
Antioxidant films
Antioxidants - chemistry
Lippia - chemistry
Mechanical Phenomena
Metal Nanoparticles - chemistry
Methylcellulose
Methylcellulose - chemistry
Microbial Sensitivity Tests
Plant Extracts - chemistry
Silver - chemistry
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Summary:•Silver nanoparticles (AgNPs) were biosynthesized using Lippia alba extract.•Methylcellulose films containing AgNPs showed superior antioxidant activity.•Increase in the elasticity of methylcellulose films containing AgNPs was observed.•Methylcellulose films containing the AgNPs presented antimicrobial activity. Methylcellulose is a biopolymer, which can be used in the preparation of films for the production of biodegradable active packaging. In this work, the methylcellulose films containing biosynthesized silver nanoparticles (AgNPs) were developed using Lippia alba extract. The physico-chemical, antioxidant, and antimicrobial properties of the films were studied. The insertion of Lippia alba compounds was verified using infrared spectroscopy (FTIR), with the appearance of a band at 1595 cm−1 and 1410 cm−1 which is characteristic of CCC stretches of the aromatic ring, and the increase in the hydrophobicity of the films containing the extract in relation to the control film. The films containing AgNPs presented a decrease in tensile strength and elastic modulus, but increased elongation. It was observed that the films that contain AgNPs presented superior antioxidant activity compared to the other films, besides antimicrobial activity against the tested microorganisms.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2018.03.014