Hydroxyalkylated xylans: Their synthesis and application in coatings for packaging and paper

Christiane Laine, Ali Harlin, Jonas Hartman, Sari Hyvärinen, Kari Kammiovirta, Björn Krogerus, Heikki Pajari, Hille Rautkoski, Harri Setälä, Jenni Sievänen, Johanna Uotila, Mika Vähä-Nissi

Research output: Contribution to journalArticleScientificpeer-review

51 Citations (Scopus)

Abstract

This paper demonstrates opportunities for wood-based xylan derivatives to be used in coating applications. A route for extraction and purification of white and pure xylan from bleached birch kraft pulp is described as a part of the production of high adsorption and high crystalline pulp. Derivatization of the xylan during the extraction step was also demonstrated. Efficient derivatization of xylan to water soluble derivatives was achieved and promising results were obtained in primary application tests as a coating component in barrier coatings on board and as a binder component in pigment coating of offset paper. With the best xylan derivate coating, the barrier properties were better than with a commercial biopolymer coating, while oxygen permeability was roughly one third of that for a polyethylene terephthalate coating. Likewise, surface strength close to the reference latex as a binder in pigment coatings was achieved by a xylan derivative. This work is part of a platform of hemicellulose derivatives enabling novel application for this medium to high molar mass hemicellulose of high purity
Original languageEnglish
Pages (from-to)692-704
JournalIndustrial Crops and Products
Volume44
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Barrier coating
  • birch kraft pulp
  • hemicellulose
  • modification
  • pigment coating
  • xylan

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