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On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites

In this work, processability and mechanical performances of bio-composites based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) containing 5, 10, and 15 wt % of bran fibers, untreated and treated with natural carnauba and bee waxes were evaluated. Wheat bran, the main byproduct of flour mill...

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Autores principales: Gigante, Vito, Cinelli, Patrizia, Righetti, Maria Cristina, Sandroni, Marco, Polacco, Giovanni, Seggiani, Maurizia, Lazzeri, Andrea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7694654/
https://www.ncbi.nlm.nih.gov/pubmed/33172020
http://dx.doi.org/10.3390/polym12112615
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author Gigante, Vito
Cinelli, Patrizia
Righetti, Maria Cristina
Sandroni, Marco
Polacco, Giovanni
Seggiani, Maurizia
Lazzeri, Andrea
author_facet Gigante, Vito
Cinelli, Patrizia
Righetti, Maria Cristina
Sandroni, Marco
Polacco, Giovanni
Seggiani, Maurizia
Lazzeri, Andrea
author_sort Gigante, Vito
collection PubMed
description In this work, processability and mechanical performances of bio-composites based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) containing 5, 10, and 15 wt % of bran fibers, untreated and treated with natural carnauba and bee waxes were evaluated. Wheat bran, the main byproduct of flour milling, was used as filler to reduce the final cost of the PHBV-based composites and, in the same time, to find a potential valorization to this agro-food by-product, widely available at low cost. The results showed that the wheat bran powder did not act as reinforcement, but as filler for PHBV, due to an unfavorable aspect ratio of the particles and poor adhesion with the polymeric matrix, with consequent moderate loss in mechanical properties (tensile strength and elongation at break). The surface treatment of the wheat bran particles with waxes, and in particular with beeswax, was found to improve the mechanical performance in terms of tensile properties and impact resistance of the composites, enhancing the adhesion between the PHBV-based polymeric matrix and the bran fibers, as confirmed by predictive analytic models and dynamic mechanical analysis results.
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spelling pubmed-76946542020-11-28 On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites Gigante, Vito Cinelli, Patrizia Righetti, Maria Cristina Sandroni, Marco Polacco, Giovanni Seggiani, Maurizia Lazzeri, Andrea Polymers (Basel) Article In this work, processability and mechanical performances of bio-composites based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) containing 5, 10, and 15 wt % of bran fibers, untreated and treated with natural carnauba and bee waxes were evaluated. Wheat bran, the main byproduct of flour milling, was used as filler to reduce the final cost of the PHBV-based composites and, in the same time, to find a potential valorization to this agro-food by-product, widely available at low cost. The results showed that the wheat bran powder did not act as reinforcement, but as filler for PHBV, due to an unfavorable aspect ratio of the particles and poor adhesion with the polymeric matrix, with consequent moderate loss in mechanical properties (tensile strength and elongation at break). The surface treatment of the wheat bran particles with waxes, and in particular with beeswax, was found to improve the mechanical performance in terms of tensile properties and impact resistance of the composites, enhancing the adhesion between the PHBV-based polymeric matrix and the bran fibers, as confirmed by predictive analytic models and dynamic mechanical analysis results. MDPI 2020-11-06 /pmc/articles/PMC7694654/ /pubmed/33172020 http://dx.doi.org/10.3390/polym12112615 Text en © 2020 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
Gigante, Vito
Cinelli, Patrizia
Righetti, Maria Cristina
Sandroni, Marco
Polacco, Giovanni
Seggiani, Maurizia
Lazzeri, Andrea
On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites
title On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites
title_full On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites
title_fullStr On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites
title_full_unstemmed On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites
title_short On the Use of Biobased Waxes to Tune Thermal and Mechanical Properties of Polyhydroxyalkanoates–Bran Biocomposites
title_sort on the use of biobased waxes to tune thermal and mechanical properties of polyhydroxyalkanoates–bran biocomposites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7694654/
https://www.ncbi.nlm.nih.gov/pubmed/33172020
http://dx.doi.org/10.3390/polym12112615
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