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HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis

In this work, composites of high density polyethylene (HDPE) with chitosan were prepared by melt compounding in a laboratory internal mixer. Maleic anhydride grafted HDPE (PE-g-MA) in a concentration up to 25 phr was used as a compatibilizer to enhance the dispersing effect of chitosan in the HDPE m...

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Autores principales: Lima, Poliana S., Trocolli, Rossanna, Wellen, Renate M. R., Rojo, Luis, Lopez-Manchado, Miguel A., Fook, Marcus V. L., Silva, Suédina M. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6835920/
https://www.ncbi.nlm.nih.gov/pubmed/31557864
http://dx.doi.org/10.3390/polym11101559
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author Lima, Poliana S.
Trocolli, Rossanna
Wellen, Renate M. R.
Rojo, Luis
Lopez-Manchado, Miguel A.
Fook, Marcus V. L.
Silva, Suédina M. L.
author_facet Lima, Poliana S.
Trocolli, Rossanna
Wellen, Renate M. R.
Rojo, Luis
Lopez-Manchado, Miguel A.
Fook, Marcus V. L.
Silva, Suédina M. L.
author_sort Lima, Poliana S.
collection PubMed
description In this work, composites of high density polyethylene (HDPE) with chitosan were prepared by melt compounding in a laboratory internal mixer. Maleic anhydride grafted HDPE (PE-g-MA) in a concentration up to 25 phr was used as a compatibilizer to enhance the dispersing effect of chitosan in the HDPE matrix. The degree of crystallinity was investigated by X-ray diffraction (XRD) and the thermal properties were analyzed by differential scanning calorimetry (DSC) and thermogravimetry (TG). The morphology was investigated by optical microscopy (OM) and scanning electron microscopy (SEM). The integrity of composites was evaluated by mechanical properties and antibacterial properties were assessed against Escherichia coli (DH5a). Neither crystallinity nor HDPE’s melting parameters changed upon addition of chitosan and PE-g-MA. Chitosan aggregates were observed, which were dispersed upon addition of PE-g-MA, which also provided improved mechanical performance. Chitosan significantly improved the bacteriostatic effect of HDPE compounds preventing bacteria to colonize thus reducing the number of viable colony-forming units (CFU). This study revealed that HDPE/chitosan composites could be obtained by melt compounding, at lower cost and additionally having antibacterial properties, which might provide a new formulation option for developing antimicrobial film for food packaging.
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spelling pubmed-68359202019-11-25 HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis Lima, Poliana S. Trocolli, Rossanna Wellen, Renate M. R. Rojo, Luis Lopez-Manchado, Miguel A. Fook, Marcus V. L. Silva, Suédina M. L. Polymers (Basel) Article In this work, composites of high density polyethylene (HDPE) with chitosan were prepared by melt compounding in a laboratory internal mixer. Maleic anhydride grafted HDPE (PE-g-MA) in a concentration up to 25 phr was used as a compatibilizer to enhance the dispersing effect of chitosan in the HDPE matrix. The degree of crystallinity was investigated by X-ray diffraction (XRD) and the thermal properties were analyzed by differential scanning calorimetry (DSC) and thermogravimetry (TG). The morphology was investigated by optical microscopy (OM) and scanning electron microscopy (SEM). The integrity of composites was evaluated by mechanical properties and antibacterial properties were assessed against Escherichia coli (DH5a). Neither crystallinity nor HDPE’s melting parameters changed upon addition of chitosan and PE-g-MA. Chitosan aggregates were observed, which were dispersed upon addition of PE-g-MA, which also provided improved mechanical performance. Chitosan significantly improved the bacteriostatic effect of HDPE compounds preventing bacteria to colonize thus reducing the number of viable colony-forming units (CFU). This study revealed that HDPE/chitosan composites could be obtained by melt compounding, at lower cost and additionally having antibacterial properties, which might provide a new formulation option for developing antimicrobial film for food packaging. MDPI 2019-09-25 /pmc/articles/PMC6835920/ /pubmed/31557864 http://dx.doi.org/10.3390/polym11101559 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
Lima, Poliana S.
Trocolli, Rossanna
Wellen, Renate M. R.
Rojo, Luis
Lopez-Manchado, Miguel A.
Fook, Marcus V. L.
Silva, Suédina M. L.
HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis
title HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis
title_full HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis
title_fullStr HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis
title_full_unstemmed HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis
title_short HDPE/Chitosan Composites Modified with PE-g-MA. Thermal, Morphological and Antibacterial Analysis
title_sort hdpe/chitosan composites modified with pe-g-ma. thermal, morphological and antibacterial analysis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6835920/
https://www.ncbi.nlm.nih.gov/pubmed/31557864
http://dx.doi.org/10.3390/polym11101559
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