Oxygen-scavenging coatings and films based on lignosulfonates and laccase
2012 (English)In: Journal of Biotechnology, ISSN 0168-1656, E-ISSN 1873-4863, Vol. 161, no 1, 14-18 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 161, no 1, 14-18 p.
Laccase, Lignosulfonate, Starch, Coating, Oxygen scavenger
IdentifiersURN: urn:nbn:se:umu:diva-56765DOI: 10.1016/j.jbiotec.2012.06.004ISI: 000306662800002PubMedID: 22721759OAI: oai:DiVA.org:umu-56765DiVA: diva2:537427