Cargando…

Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging

Bionanocomposite materials have been designed as a promising route to enhance biopolymer properties, especially for food packaging application. The present study reports the preparation of bionanocomposite films of alginate with different loadings of pure reduced graphene oxide (rGO) or of mixed zin...

Descripción completa

Detalles Bibliográficos
Autores principales: Alves, Zélia, Ferreira, Nuno M., Mendo, Sónia, Ferreira, Paula, Nunes, Cláudia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8466826/
https://www.ncbi.nlm.nih.gov/pubmed/34576102
http://dx.doi.org/10.3390/ijms22189943
_version_ 1784573239193763840
author Alves, Zélia
Ferreira, Nuno M.
Mendo, Sónia
Ferreira, Paula
Nunes, Cláudia
author_facet Alves, Zélia
Ferreira, Nuno M.
Mendo, Sónia
Ferreira, Paula
Nunes, Cláudia
author_sort Alves, Zélia
collection PubMed
description Bionanocomposite materials have been designed as a promising route to enhance biopolymer properties, especially for food packaging application. The present study reports the preparation of bionanocomposite films of alginate with different loadings of pure reduced graphene oxide (rGO) or of mixed zinc oxide-rGO (ZnO-rGO) fillers by solvent casting. Sepiolite is used to make compatible rGO with the hydrophilic matrix. The addition of fillers to alginate matrix maintains the low water solubility promoted by the calcium chloride treatment, and, additionally, they demonstrate a weaker mechanical properties, and a slight increase in water vapor permeability and wettability. Due to the properties of ZnO-rGO, the alginate bionanocomposites show an increase of electrical conductivity with the increase of filler content. While the highest electrical conductivity (0.1 S/m) is achieved by the in-plane measurement, it is in the through-plane measurement the remarkable enhancement of almost 30 times greater than the alginate film. With 50% of ZnO-rGO filler, the bionanocomposites present the highest antioxidant and antibacterial activities. The combination of electrical conductivity with bioactive properties makes these films promising not only to extend food shelf-life but also to allow packaged food sterilization at low temperature.
format Online
Article
Text
id pubmed-8466826
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-84668262021-09-27 Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging Alves, Zélia Ferreira, Nuno M. Mendo, Sónia Ferreira, Paula Nunes, Cláudia Int J Mol Sci Article Bionanocomposite materials have been designed as a promising route to enhance biopolymer properties, especially for food packaging application. The present study reports the preparation of bionanocomposite films of alginate with different loadings of pure reduced graphene oxide (rGO) or of mixed zinc oxide-rGO (ZnO-rGO) fillers by solvent casting. Sepiolite is used to make compatible rGO with the hydrophilic matrix. The addition of fillers to alginate matrix maintains the low water solubility promoted by the calcium chloride treatment, and, additionally, they demonstrate a weaker mechanical properties, and a slight increase in water vapor permeability and wettability. Due to the properties of ZnO-rGO, the alginate bionanocomposites show an increase of electrical conductivity with the increase of filler content. While the highest electrical conductivity (0.1 S/m) is achieved by the in-plane measurement, it is in the through-plane measurement the remarkable enhancement of almost 30 times greater than the alginate film. With 50% of ZnO-rGO filler, the bionanocomposites present the highest antioxidant and antibacterial activities. The combination of electrical conductivity with bioactive properties makes these films promising not only to extend food shelf-life but also to allow packaged food sterilization at low temperature. MDPI 2021-09-14 /pmc/articles/PMC8466826/ /pubmed/34576102 http://dx.doi.org/10.3390/ijms22189943 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Alves, Zélia
Ferreira, Nuno M.
Mendo, Sónia
Ferreira, Paula
Nunes, Cláudia
Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging
title Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging
title_full Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging
title_fullStr Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging
title_full_unstemmed Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging
title_short Design of Alginate-Based Bionanocomposites with Electrical Conductivity for Active Food Packaging
title_sort design of alginate-based bionanocomposites with electrical conductivity for active food packaging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8466826/
https://www.ncbi.nlm.nih.gov/pubmed/34576102
http://dx.doi.org/10.3390/ijms22189943
work_keys_str_mv AT alveszelia designofalginatebasedbionanocompositeswithelectricalconductivityforactivefoodpackaging
AT ferreiranunom designofalginatebasedbionanocompositeswithelectricalconductivityforactivefoodpackaging
AT mendosonia designofalginatebasedbionanocompositeswithelectricalconductivityforactivefoodpackaging
AT ferreirapaula designofalginatebasedbionanocompositeswithelectricalconductivityforactivefoodpackaging
AT nunesclaudia designofalginatebasedbionanocompositeswithelectricalconductivityforactivefoodpackaging