Shear and adhesion strength of open and closed system heat-treated wood samples

This paper investigated the effects of heat treatment in open (atmospheric pressure) and a closed (under pressure) system on the shear and adhesion strength of Scots pine (Pinus sylvestris) wood. In addition, pull-off adherence testing was carried out of the coatings with water-based, polyurethane-b...

Full description

Saved in:
Bibliographic Details
Published in:Maderas 2021-01, Vol.23, p.1-10
Main Authors: Can, Ahmet, Krystofiak, Tomasz, Lis, Barbara
Format: Article
Language:English
Subjects:
heat treatment
MATERIALS SCIENCE, PAPER & WOOD
mechanical properties
pinus sylvestris
pull-off adhesion
shear strength
varnish
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper investigated the effects of heat treatment in open (atmospheric pressure) and a closed (under pressure) system on the shear and adhesion strength of Scots pine (Pinus sylvestris) wood. In addition, pull-off adherence testing was carried out of the coatings with water-based, polyurethane-based and oil/wax-based varnishes. Shear strength decreased significantly after heat treatment in Scots pine (31 % to 39 %) in the open system, while it decreased between 2 % and 38% in the closed system without glue. The shear strength of the wood samples glued with glue was higher than the samples without glue at the laboratory scale. The lower shear strength of modified wood could be attributed to other factors, such as the reduced chemical bonding or mechanical interlocking of adhesives, and the reduced strength of the brittle modified wood substrate. With increasing, heat treatment temperature adherence decreased. Maximum pull-off adhesion (4,80 MPa) was observed in the control samples coated with polyurethane-based varnish.
ISSN:0718-221X
0717-3644
0718-221X
DOI:10.4067/S0718-221X2021000100432