Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites

The preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. The films were prepared with a relation of 3:2 of starch:PVA and nanoclay (0.5, 1.0, and 1.5% <i>w</i>/<i>v</i>), and glycerol as plasticize...

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Autores principales: Heidy Lorena Calambas, Abril Fonseca, Dayana Adames, Yaneli Aguirre-Loredo, Carolina Caicedo
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Publicado: MDPI AG 2021
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spelling oai:doaj.org-article:9008fded60f74bce9e9d55b00607ae162021-11-11T18:40:11ZPhysical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites10.3390/molecules262167341420-3049https://doaj.org/article/9008fded60f74bce9e9d55b00607ae162021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6734https://doaj.org/toc/1420-3049The preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. The films were prepared with a relation of 3:2 of starch:PVA and nanoclay (0.5, 1.0, and 1.5% <i>w</i>/<i>v</i>), and glycerol as plasticizer. The nanoclays before being incorporated in the filmogenic solution of starch-PVA were dispersed in two ways: by magnetic stirring and by sonication. The SEM results suggest that the sonication of nanoclay is necessary to reach a good dispersion along the polymeric matrix. FTIR results of films with 1.0 and 1.5% <i>w</i>/<i>v</i> of sonicated nanoclay suggest a strong interaction of hydrogen bond with the polymeric matrix of starch-PVA. However, the properties of WVP, tensile strength, percentage of elongation at break, and Young’s modulus improved to the film with sonicated nanoclay at 0.5% <i>w</i>/<i>v</i>, while in films with 1.0 and 1.5% <i>w</i>/<i>w</i> these properties were even worse than in film without nanoclay. Nanoclay concentrations higher than 1.0 <i>w</i>/<i>v</i> saturate the polymer matrix, affecting the physicochemical properties. Accordingly, the successful incorporation of nanoclays at 0.5% <i>w</i>/<i>v</i> into the matrix starch-PVA suggests that this film is a good candidate for use as biodegradable packaging.Heidy Lorena CalambasAbril FonsecaDayana AdamesYaneli Aguirre-LoredoCarolina CaicedoMDPI AGarticlebiodegradable polymersnanocompositeultrasound-assistedmechanical propertiesmontmorilloniteOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6734, p 6734 (2021)
institution DOAJ
collection DOAJ
language EN
topic biodegradable polymers
nanocomposite
ultrasound-assisted
mechanical properties
montmorillonite
Organic chemistry
QD241-441
spellingShingle biodegradable polymers
nanocomposite
ultrasound-assisted
mechanical properties
montmorillonite
Organic chemistry
QD241-441
Heidy Lorena Calambas
Abril Fonseca
Dayana Adames
Yaneli Aguirre-Loredo
Carolina Caicedo
Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
description The preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. The films were prepared with a relation of 3:2 of starch:PVA and nanoclay (0.5, 1.0, and 1.5% <i>w</i>/<i>v</i>), and glycerol as plasticizer. The nanoclays before being incorporated in the filmogenic solution of starch-PVA were dispersed in two ways: by magnetic stirring and by sonication. The SEM results suggest that the sonication of nanoclay is necessary to reach a good dispersion along the polymeric matrix. FTIR results of films with 1.0 and 1.5% <i>w</i>/<i>v</i> of sonicated nanoclay suggest a strong interaction of hydrogen bond with the polymeric matrix of starch-PVA. However, the properties of WVP, tensile strength, percentage of elongation at break, and Young’s modulus improved to the film with sonicated nanoclay at 0.5% <i>w</i>/<i>v</i>, while in films with 1.0 and 1.5% <i>w</i>/<i>w</i> these properties were even worse than in film without nanoclay. Nanoclay concentrations higher than 1.0 <i>w</i>/<i>v</i> saturate the polymer matrix, affecting the physicochemical properties. Accordingly, the successful incorporation of nanoclays at 0.5% <i>w</i>/<i>v</i> into the matrix starch-PVA suggests that this film is a good candidate for use as biodegradable packaging.
format article
author Heidy Lorena Calambas
Abril Fonseca
Dayana Adames
Yaneli Aguirre-Loredo
Carolina Caicedo
author_facet Heidy Lorena Calambas
Abril Fonseca
Dayana Adames
Yaneli Aguirre-Loredo
Carolina Caicedo
author_sort Heidy Lorena Calambas
title Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
title_short Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
title_full Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
title_fullStr Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
title_full_unstemmed Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
title_sort physical-mechanical behavior and water-barrier properties of biopolymers-clay nanocomposites
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/9008fded60f74bce9e9d55b00607ae16
work_keys_str_mv AT heidylorenacalambas physicalmechanicalbehaviorandwaterbarrierpropertiesofbiopolymersclaynanocomposites
AT abrilfonseca physicalmechanicalbehaviorandwaterbarrierpropertiesofbiopolymersclaynanocomposites
AT dayanaadames physicalmechanicalbehaviorandwaterbarrierpropertiesofbiopolymersclaynanocomposites
AT yaneliaguirreloredo physicalmechanicalbehaviorandwaterbarrierpropertiesofbiopolymersclaynanocomposites
AT carolinacaicedo physicalmechanicalbehaviorandwaterbarrierpropertiesofbiopolymersclaynanocomposites
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