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Mode I cohesive law of birch wood-biobased adhesive systems

van Blokland, Joran and Serrano, Erik LU orcid (2024) In Wood Material Science and Engineering
Abstract

The development and assessment of bio-based wood adhesives face challenges due to the limitations of conventional test procedures, particularly in predicting adhesive performance in real-world applications. This study investigated the mode I cohesive law of two birch wood-biobased adhesive systems, comparing them with conventional fossil-fuel-based systems. The experimental approach, developed during the ‘90s at Lund University, involves direct measurement of the traction-separation relation and allows evaluation of post-peak behaviour and fracture mechanical property characterisation. SEM analysis confirmed fracture development within the bond line for all tests. The birch–fish-adhesive bonds demonstrated peak stress of approx. 4 MPa,... (More)

The development and assessment of bio-based wood adhesives face challenges due to the limitations of conventional test procedures, particularly in predicting adhesive performance in real-world applications. This study investigated the mode I cohesive law of two birch wood-biobased adhesive systems, comparing them with conventional fossil-fuel-based systems. The experimental approach, developed during the ‘90s at Lund University, involves direct measurement of the traction-separation relation and allows evaluation of post-peak behaviour and fracture mechanical property characterisation. SEM analysis confirmed fracture development within the bond line for all tests. The birch–fish-adhesive bonds demonstrated peak stress of approx. 4 MPa, with serrated fracture surfaces and favourable fracture properties (specific fracture energy approx. 370 Nm/m2, brittleness approx. 40 GPa/m). Birch wood bonded with lignin-based adhesive showed lower, yet reasonable, levels of peak stress (approx. 3 MPa) but less favourable fracture properties (specific fracture energy approx. 110 Nm/m2, brittleness approx. 90 GPa/m), suggesting room for further optimisation.

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author
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organization
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type
Contribution to journal
publication status
epub
subject
keywords
Betula spp, bond strength, Fracture mechanics, lignin, opening mode, protein, specific fracture energy
in
Wood Material Science and Engineering
publisher
Taylor & Francis
external identifiers
  • scopus:85206840608
ISSN
1748-0272
DOI
10.1080/17480272.2024.2414233
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
id
a8e78fc0-f98f-44c0-a86b-795ace6849e0
date added to LUP
2024-12-17 09:48:37
date last changed
2025-04-04 15:09:18
@article{a8e78fc0-f98f-44c0-a86b-795ace6849e0,
  abstract     = {{<p>The development and assessment of bio-based wood adhesives face challenges due to the limitations of conventional test procedures, particularly in predicting adhesive performance in real-world applications. This study investigated the mode I cohesive law of two birch wood-biobased adhesive systems, comparing them with conventional fossil-fuel-based systems. The experimental approach, developed during the ‘90s at Lund University, involves direct measurement of the traction-separation relation and allows evaluation of post-peak behaviour and fracture mechanical property characterisation. SEM analysis confirmed fracture development within the bond line for all tests. The birch–fish-adhesive bonds demonstrated peak stress of approx. 4 MPa, with serrated fracture surfaces and favourable fracture properties (specific fracture energy approx. 370 Nm/m<sup>2</sup>, brittleness approx. 40 GPa/m). Birch wood bonded with lignin-based adhesive showed lower, yet reasonable, levels of peak stress (approx. 3 MPa) but less favourable fracture properties (specific fracture energy approx. 110 Nm/m<sup>2</sup>, brittleness approx. 90 GPa/m), suggesting room for further optimisation.</p>}},
  author       = {{van Blokland, Joran and Serrano, Erik}},
  issn         = {{1748-0272}},
  keywords     = {{Betula spp; bond strength; Fracture mechanics; lignin; opening mode; protein; specific fracture energy}},
  language     = {{eng}},
  publisher    = {{Taylor & Francis}},
  series       = {{Wood Material Science and Engineering}},
  title        = {{Mode I cohesive law of birch wood-biobased adhesive systems}},
  url          = {{http://dx.doi.org/10.1080/17480272.2024.2414233}},
  doi          = {{10.1080/17480272.2024.2414233}},
  year         = {{2024}},
}