Production and properties of adhesives formulated from laccase modified Kraft lignin

Victor Ibrahim, Gashaw Mamo, Per-Johan Gustafsson, Rajni Hatti-Kaul

Research output: Contribution to journalArticlepeer-review

Abstract

Kraft lignin was used to formulate adhesives in combination with polyethyleneimine, chitosan and soy protein, respectively. The tensile strengths of bond lines formulated with laccase-treated and untreated lignin were found to be similar. However, a remarkable difference was noted when laccase-treated lignin was reduced by sodium borohydride prior to reacting either with chitosan or soy protein - decreasing the strength in the former case while increasing it in the other. Among the formulations, laccase treated and reduced lignin-soy protein adhesive exhibited more than half the strength of commercial polyurethane adhesive and retained 70% of its initial strength after two cycles of 1 h boiling and drying. (C) 2013 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)343-348
JournalIndustrial Crops and Products
Volume45
DOIs
Publication statusPublished - 2013

Subject classification (UKÄ)

  • Mechanical Engineering
  • Industrial Biotechnology

Free keywords

  • Formaldehyde-free adhesive
  • Lignin
  • Laccase
  • Fracture energy
  • Tensile
  • strength
  • Water resistance

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