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European Journal of Wood and Wood Products

Erschienen in:

11.04.2021 | Original Article

Effects of gluing conditions for formaldehyde-free tannin adhesive on the oriented bamboo scrimber board properties

verfasst von: Chia-Ju Lee, Tzu-Cheng Chang, Min-Jay Chung

Erschienen in: European Journal of Wood and Wood Products | Ausgabe 6/2021

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Abstract

The formaldehyde-free tannin adhesive (AcBTanGlu) was synthesized by bark extractives of Acacia confusa and hexamethylenetetramine, and was further used for production of the oriented bamboo scrimber board (OBSB) in this study. When Acacia bark extract tannins are mixed with 2% hexamethylenetetramine, the OBSB pressed at a hot pressing temperature of 150 °C for 15 min can obtain the maximum mechanical strength. The tap tone velocity (V_t), ultrasonic-wave velocity (V_u), dynamic modulus of elasticity (DMOE_u), dynamic modulus of tap tone velocity (DMOE_t), screw holding strength (SHS), and dimensional stability of AcBTanGlu glued OBSB are significantly higher than those of UF and PF glued ones. AcBTanGlu glued OBSB also has higher modulus of elasticity (MOE)_(//) and modulus of rupture (MOR)_(//) values than the parallel structure laminated bamboo board (LBB) and laminated beams made with whole moso bamboo (Phyllostachys pubescens). The 12-week decay test with L. betulina and L. sulphureus showed no significant difference between OBSB glued by AcBTanGlu and UF (p > 0.05). The results of this study will help the bamboo processing industry to gain an understanding of the properties of AcBTanGlu glued OBSB.

Vorheriger Artikel Comparison of environmental impacts of structurally equivalent wood-based floors

Nächster Artikel Properties of an organokaolin-modified soybean meal-based adhesive used for adhering cotton fabric to wood composites

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Titel: Effects of gluing conditions for formaldehyde-free tannin adhesive on the oriented bamboo scrimber board properties
verfasst von: Chia-Ju Lee
Tzu-Cheng Chang
Min-Jay Chung
Publikationsdatum: 11.04.2021
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Wood and Wood Products / Ausgabe 6/2021
Print ISSN: 0018-3768
Elektronische ISSN: 1436-736X
DOI: https://doi.org/10.1007/s00107-021-01701-6

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