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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MDPI AG
2021
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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) |
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biodegradable polymers nanocomposite ultrasound-assisted mechanical properties montmorillonite Organic chemistry QD241-441 |
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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 |
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