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New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin
In this work, fungal melanin was used for the first time to prepare poly(lactic acid)-based composites. The films of various melanin concentrations (0.025%, 0.05% and 0.2% w/w) were prepared using an extrusion method. The mechanical, antioxidant, antimicrobial, water vapor and UV-Vis barrier propert...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415272/ https://www.ncbi.nlm.nih.gov/pubmed/30966422 http://dx.doi.org/10.3390/polym10040386 |
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author | Łopusiewicz, Łukasz Jędra, Filip Mizielińska, Małgorzata |
author_facet | Łopusiewicz, Łukasz Jędra, Filip Mizielińska, Małgorzata |
author_sort | Łopusiewicz, Łukasz |
collection | PubMed |
description | In this work, fungal melanin was used for the first time to prepare poly(lactic acid)-based composites. The films of various melanin concentrations (0.025%, 0.05% and 0.2% w/w) were prepared using an extrusion method. The mechanical, antioxidant, antimicrobial, water vapor and UV-Vis barrier properties, as well as available polyphenolics on the surface, were studied. FT-IR and Raman spectroscopy studies were carried out to analyze the chemical composition of the resulting films. The hydrophobicity, color response, thermal, optical properties, and opacity values were also determined. The results of this study show that the addition of fungal melanin to poly(lactic acid) (PLA) as a modifier influenced mechanical and water vapor barrier properties depending on melanin concentration. In low concentration, melanin enhanced the mechanical and barrier properties of the modified films, but in larger amounts, the properties were decreased. The UV-Vis barrier properties of PLA/melanin composites were marginally improved. Differential Scanning Calorimetry (DSC) analysis indicated that crystallinity of PLA increased by the addition of melanin, but this did not affect the thermal stability of the films. Modified PLA/melanin films showed good antioxidant activity and were active against Enterococcus faecalis, Pseudomonas aeruginosa and Pseudomonas putida. The addition of melanin caused changes in color values, decreasing lightness and increasing the redness and yellowness of films. Based on the results of this study, fungal melanin has good potential to be exploited as a value-added modifier that can improve the overall properties of PLA. |
format | Online Article Text |
id | pubmed-6415272 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64152722019-04-02 New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin Łopusiewicz, Łukasz Jędra, Filip Mizielińska, Małgorzata Polymers (Basel) Article In this work, fungal melanin was used for the first time to prepare poly(lactic acid)-based composites. The films of various melanin concentrations (0.025%, 0.05% and 0.2% w/w) were prepared using an extrusion method. The mechanical, antioxidant, antimicrobial, water vapor and UV-Vis barrier properties, as well as available polyphenolics on the surface, were studied. FT-IR and Raman spectroscopy studies were carried out to analyze the chemical composition of the resulting films. The hydrophobicity, color response, thermal, optical properties, and opacity values were also determined. The results of this study show that the addition of fungal melanin to poly(lactic acid) (PLA) as a modifier influenced mechanical and water vapor barrier properties depending on melanin concentration. In low concentration, melanin enhanced the mechanical and barrier properties of the modified films, but in larger amounts, the properties were decreased. The UV-Vis barrier properties of PLA/melanin composites were marginally improved. Differential Scanning Calorimetry (DSC) analysis indicated that crystallinity of PLA increased by the addition of melanin, but this did not affect the thermal stability of the films. Modified PLA/melanin films showed good antioxidant activity and were active against Enterococcus faecalis, Pseudomonas aeruginosa and Pseudomonas putida. The addition of melanin caused changes in color values, decreasing lightness and increasing the redness and yellowness of films. Based on the results of this study, fungal melanin has good potential to be exploited as a value-added modifier that can improve the overall properties of PLA. MDPI 2018-04-01 /pmc/articles/PMC6415272/ /pubmed/30966422 http://dx.doi.org/10.3390/polym10040386 Text en © 2018 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 Łopusiewicz, Łukasz Jędra, Filip Mizielińska, Małgorzata New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin |
title | New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin |
title_full | New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin |
title_fullStr | New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin |
title_full_unstemmed | New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin |
title_short | New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin |
title_sort | new poly(lactic acid) active packaging composite films incorporated with fungal melanin |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415272/ https://www.ncbi.nlm.nih.gov/pubmed/30966422 http://dx.doi.org/10.3390/polym10040386 |
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