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Lignin-containing coatings for packaging materials
Karlstad University, Sweden.
Karlstad University, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging. Karlstad University, Sweden.ORCID iD: 0000-0003-0783-4959
Karlstad University, Sweden.
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 33, no 3, p. 548-556Article in journal (Refereed) Published
Abstract [en]

The mechanical properties and chemical stability in water of self-supporting films made from aqueous solutions of starch and lignin, and the barrier properties of paperboard coated with solutions of these polymers have been studied. The dissolution of starch from the starch-lignin films in contact with the model liquids was decreased significantly when lignin was added to the starch films. The addition of ammonium zirconium carbonate (AZC) to the formulations as a crosslinking agent substantially increased the storage modulus of the starch-lignin films, which indicated that crosslinking had occurred. The addition of AZC to the formulations also led to a decrease in dissolution of both starch and lignin from the starch-lignin films in contact with model liquids. The effect of AZC on the water stability of the films was greater when the pH of the starch-lignin-AZC solution was adjusted with ammonia rather than NaOH. The addition of NH4Cl solution as a presumed catalyst to the recipe when the pH adjustment was performed with NaOH did not improve the effect of AZC on the water stability of the films. The water vapour transmission rate of the coated paperboard decreased slightly when AZC was added to the coating formulation.

Place, publisher, year, edition, pages
2018. Vol. 33, no 3, p. 548-556
Keywords [en]
barrier coatings, glycerol, lignin, mechanical properties, starch, Ammonia, Chemical stability, Chlorine compounds, Coatings, Crosslinking, Dissolution, Packaging materials, Paperboards, pH effects, Sodium hydroxide, Solutions, Zirconium compounds, Barrier properties, Coated paperboard, Coating formulations, Cross linking agents, Self-supporting film, Transmission rates, Water stability
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-34434DOI: 10.1515/npprj-2018-3042Scopus ID: 2-s2.0-85050633600OAI: oai:DiVA.org:ri-34434DiVA, id: diva2:1237187
Available from: 2018-08-07 Created: 2018-08-07 Last updated: 2018-12-11Bibliographically approved

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Rättö, Peter

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