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Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings

Lignin derivatives have potential as antioxidants in advanced packaging materials through their ability to scavenge oxygen in reactions catalyzed by phenol-oxidizing enzymes, such as laccase. The effects of size fractionation of lignosulfonates on laccase-catalyzed reactions were investigated in exp...

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Autores principales: Winestrand, Sandra, Järnström, Lars, Jönsson, Leif J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8537236/
https://www.ncbi.nlm.nih.gov/pubmed/34684902
http://dx.doi.org/10.3390/molecules26206322
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author Winestrand, Sandra
Järnström, Lars
Jönsson, Leif J.
author_facet Winestrand, Sandra
Järnström, Lars
Jönsson, Leif J.
author_sort Winestrand, Sandra
collection PubMed
description Lignin derivatives have potential as antioxidants in advanced packaging materials through their ability to scavenge oxygen in reactions catalyzed by phenol-oxidizing enzymes, such as laccase. The effects of size fractionation of lignosulfonates on laccase-catalyzed reactions were investigated in experiments with aqueous solutions, films, and coated paperboard. Four industrial lignosulfonate preparations were compared: Feed (unfractionated), Prod (5–60 kDa enriched), Conc (≥60 kDa enriched), and Perm (≤60 kDa enriched). Extraction of lignosulfonates from films showed that the enzymic reaction increased the average molecular weight from <10,000 to up to 66,000. The enzymatic reaction resulted in an increase in the water contact angle of the films from the range 25–49° to 56–81°. The four preparations showed relatively small differences with regard to their ability to scavenge oxygen in aqueous solution and in experiments with coated paperboards in sealed chambers. Coatings with lignosulfonates where the contents of low-molecular weight material had been reduced (i.e., Prod and Conc) showed improved water resistance after the enzymic reaction. Thus, in both aqueous and solid media, fractionation of lignosulfonates had little effect on oxygen scavenging, but fractionation was beneficial for other reasons, such as improved cross-linking resulting in higher molecular weight and superior water resistance.
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spelling pubmed-85372362021-10-24 Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings Winestrand, Sandra Järnström, Lars Jönsson, Leif J. Molecules Article Lignin derivatives have potential as antioxidants in advanced packaging materials through their ability to scavenge oxygen in reactions catalyzed by phenol-oxidizing enzymes, such as laccase. The effects of size fractionation of lignosulfonates on laccase-catalyzed reactions were investigated in experiments with aqueous solutions, films, and coated paperboard. Four industrial lignosulfonate preparations were compared: Feed (unfractionated), Prod (5–60 kDa enriched), Conc (≥60 kDa enriched), and Perm (≤60 kDa enriched). Extraction of lignosulfonates from films showed that the enzymic reaction increased the average molecular weight from <10,000 to up to 66,000. The enzymatic reaction resulted in an increase in the water contact angle of the films from the range 25–49° to 56–81°. The four preparations showed relatively small differences with regard to their ability to scavenge oxygen in aqueous solution and in experiments with coated paperboards in sealed chambers. Coatings with lignosulfonates where the contents of low-molecular weight material had been reduced (i.e., Prod and Conc) showed improved water resistance after the enzymic reaction. Thus, in both aqueous and solid media, fractionation of lignosulfonates had little effect on oxygen scavenging, but fractionation was beneficial for other reasons, such as improved cross-linking resulting in higher molecular weight and superior water resistance. MDPI 2021-10-19 /pmc/articles/PMC8537236/ /pubmed/34684902 http://dx.doi.org/10.3390/molecules26206322 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Winestrand, Sandra
Järnström, Lars
Jönsson, Leif J.
Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings
title Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings
title_full Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings
title_fullStr Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings
title_full_unstemmed Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings
title_short Fractionated Lignosulfonates for Laccase-Catalyzed Oxygen-Scavenging Films and Coatings
title_sort fractionated lignosulfonates for laccase-catalyzed oxygen-scavenging films and coatings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8537236/
https://www.ncbi.nlm.nih.gov/pubmed/34684902
http://dx.doi.org/10.3390/molecules26206322
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