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Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging

Iron particles of sizes between 6 and 20 nm forming aggregates of 57 ± 17 nm were synthesized by chemical reduction of iron precursors on the surface of montmorillonite (MMT). This active MMT-Fe powder was then uniformly distributed in a linear low-density polyethylene (LLDPE) matrix by extrusion at...

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Autores principales: Kombaya-Touckia-Linin, Erland-Modeste, Gaucel, Sébastien, Sougrati, Moulay T., Stievano, Lorenzo, Gontard, Nathalie, Guillard, Valérie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6780512/
https://www.ncbi.nlm.nih.gov/pubmed/31450786
http://dx.doi.org/10.3390/nano9091193
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author Kombaya-Touckia-Linin, Erland-Modeste
Gaucel, Sébastien
Sougrati, Moulay T.
Stievano, Lorenzo
Gontard, Nathalie
Guillard, Valérie
author_facet Kombaya-Touckia-Linin, Erland-Modeste
Gaucel, Sébastien
Sougrati, Moulay T.
Stievano, Lorenzo
Gontard, Nathalie
Guillard, Valérie
author_sort Kombaya-Touckia-Linin, Erland-Modeste
collection PubMed
description Iron particles of sizes between 6 and 20 nm forming aggregates of 57 ± 17 nm were synthesized by chemical reduction of iron precursors on the surface of montmorillonite (MMT). This active MMT-Fe powder was then uniformly distributed in a linear low-density polyethylene (LLDPE) matrix by extrusion at atmospheric conditions, as confirmed by wide-angle X-ray scattering (WAXS), which also detected a partial exfoliation of the nanoclays. Thermogravimetric analysis (TGA) did not detect any significant modification of the degradation temperature between nanocomposites and active nanocomposites. (57)Fe Mössbauer spectroscopy evidenced the formation of a majority of iron boride in MMT-Fe as well as in the active film containing it. The LLDPE.Fu15.MMT-Fe3.75 and LLDPE.Fu15.MMT-Fe6.25 films had oxygen-scavenging capacities of 0.031 ± 0.002 and 0.055 ± 0.009 g(O(2))/g(Fe), respectively, while the neat powder had an adsorption capacity of 0.122 g(O(2))/g(Fe). This result confirms that the fresh film samples were partially oxidized shortly after thermomechanical processing (60% of oxidized species according to Mössbauer spectroscopy). No significant difference in oxygen permeability was observed when MMT-Fe was added. This was related to the relatively small film surface used for measuring the permeability. The reaction–diffusion model proposed here was able to reproduce the observed data of O(2) adsorption in an active nanocomposite, which validated the O(2) adsorption model previously developed for dried MMT-Fe powder.
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spelling pubmed-67805122019-10-30 Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging Kombaya-Touckia-Linin, Erland-Modeste Gaucel, Sébastien Sougrati, Moulay T. Stievano, Lorenzo Gontard, Nathalie Guillard, Valérie Nanomaterials (Basel) Article Iron particles of sizes between 6 and 20 nm forming aggregates of 57 ± 17 nm were synthesized by chemical reduction of iron precursors on the surface of montmorillonite (MMT). This active MMT-Fe powder was then uniformly distributed in a linear low-density polyethylene (LLDPE) matrix by extrusion at atmospheric conditions, as confirmed by wide-angle X-ray scattering (WAXS), which also detected a partial exfoliation of the nanoclays. Thermogravimetric analysis (TGA) did not detect any significant modification of the degradation temperature between nanocomposites and active nanocomposites. (57)Fe Mössbauer spectroscopy evidenced the formation of a majority of iron boride in MMT-Fe as well as in the active film containing it. The LLDPE.Fu15.MMT-Fe3.75 and LLDPE.Fu15.MMT-Fe6.25 films had oxygen-scavenging capacities of 0.031 ± 0.002 and 0.055 ± 0.009 g(O(2))/g(Fe), respectively, while the neat powder had an adsorption capacity of 0.122 g(O(2))/g(Fe). This result confirms that the fresh film samples were partially oxidized shortly after thermomechanical processing (60% of oxidized species according to Mössbauer spectroscopy). No significant difference in oxygen permeability was observed when MMT-Fe was added. This was related to the relatively small film surface used for measuring the permeability. The reaction–diffusion model proposed here was able to reproduce the observed data of O(2) adsorption in an active nanocomposite, which validated the O(2) adsorption model previously developed for dried MMT-Fe powder. MDPI 2019-08-23 /pmc/articles/PMC6780512/ /pubmed/31450786 http://dx.doi.org/10.3390/nano9091193 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kombaya-Touckia-Linin, Erland-Modeste
Gaucel, Sébastien
Sougrati, Moulay T.
Stievano, Lorenzo
Gontard, Nathalie
Guillard, Valérie
Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging
title Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging
title_full Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging
title_fullStr Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging
title_full_unstemmed Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging
title_short Elaboration and Characterization of Active Films Containing Iron–Montmorillonite Nanocomposites for O(2) Scavenging
title_sort elaboration and characterization of active films containing iron–montmorillonite nanocomposites for o(2) scavenging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6780512/
https://www.ncbi.nlm.nih.gov/pubmed/31450786
http://dx.doi.org/10.3390/nano9091193
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