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Oxygen-scavenging coatings and films based on lignosulfonates and laccase
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
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2012 (Engelska)Ingår i: Journal of Biotechnology, ISSN 0168-1656, E-ISSN 1873-4863, Vol. 161, nr 1, s. 14-18Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Laccase and lignosulfonates were included in coating colors and embedded in latex-based or starch-based films and coatings on foil or board. After 6 days at 23°C and 100% relative humidity, the oxygen content in airtight chambers decreased from 1.0% (synthetic gas consisting of 99% N(2) and 1% O(2)) to 0.3% in the presence of board coated with lignosulfonate and laccase, while the oxygen content remained unchanged in control experiments without enzyme. The water stability of lignosulfonate-containing latex-based coatings and starch-based films was improved after laccase-catalyzed oxidation of lignosulfonates, which indicates polymerization to products with lower solubility in water. Furthermore, the E' modulus of starch-based films increased with 30%, which indicates laccase-catalyzed polymerization of lignosulfonates resulting in increased stiffness of the film. The results suggest that laccases and lignosulfonates can be used as an oxygen-scavenging system in active packaging and that enzyme-catalyzed polymerization of lignosulfonates contributes to improved water stability and mechanical properties.

Ort, förlag, år, upplaga, sidor
Elsevier, 2012. Vol. 161, nr 1, s. 14-18
Nyckelord [en]
Laccase, Lignosulfonate, Starch, Coating, Oxygen scavenger
Nationell ämneskategori
Kemi
Identifikatorer
URN: urn:nbn:se:umu:diva-56765DOI: 10.1016/j.jbiotec.2012.06.004ISI: 000306662800002PubMedID: 22721759OAI: oai:DiVA.org:umu-56765DiVA, id: diva2:537427
Tillgänglig från: 2012-06-26 Skapad: 2012-06-26 Senast uppdaterad: 2020-01-30Bibliografiskt granskad

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Winestrand, SandraJönsson, Leif J

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