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 language | English |
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Pages (from-to) | 343-348 |
Journal | Industrial Crops and Products |
Volume | 45 |
DOIs | |
Publication status | Published - 2013 |
Subject classification (UKÄ)
- Mechanical Engineering
- Industrial Biotechnology
Free keywords
- Formaldehyde-free adhesive
- Lignin
- Laccase
- Fracture energy
- Tensile
- strength
- Water resistance