Abstract
Acetylated wood is a durable and dimensionally stable product with many potential applications in exterior timber structures. Research has shown that acetylated wood can be effectively bonded by various adhesive types. However, one of the most commonly used adhesives for timber constructions, melamine urea formaldehyde (MUF), shows poor performance in combination with acetylated wood in delamination tests based on cyclic wetting and drying. The hydrophobic acetylated wood surface leads to reduced adhesion due to poorer adhesive wetting and fewer chemical bonds between the resin and the wood polymers. The use of a resorcinol-formaldehyde (RF)-based primer on the acetylated wood surface prior to the application of MUF leads to positive gluing results with both acetylated radiata pine and beech, providing significantly improved resistance to delamination. Radial penetration of the primer and MUF in acetylated wood shows higher penetration compared with untreated wood. In addition, a phenol resorcinol-formaldehyde adhesive system showed high resistance against delamination and can be used for gluing of acetylated wood.
Funding source: Norwegian Research Council
Award Identifier / Grant number: 244272/E50
Funding statement: Norwegian Research Council, Funder Id: http://dx.doi.org/10.13039/501100005416, Grant Number: 244272/E50
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Employment or leadership: None declared.
Honorarium: None declared.
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© 2020 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Editorial
- Wood modification research in Europe
- Review
- Outlook for modified wood use and regulations in circular economy
- Original Articles
- Suitability of a lignin-derived mono-phenol mimic to replace phenol in phenol-formaldehyde resin for use in wood treatment
- Beech wood treated with polyglycerol succinate: a new effective method for its protection and stabilization
- Study on the impregnation quality of rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) sawn veneers after treatment with 1,3-dimethylol-4,5- dihydroxyethyleneurea (DMDHEU)
- The effect of diammonium phosphate and sodium silicate on the adhesion and fire properties of birch veneer
- Enhanced bonding of acetylated wood with an MUF-based adhesive and a resorcinol-formaldehyde-based primer
- Brown rot gene expression and regulation in acetylated and furfurylated wood: a complex picture
- Investigation of the effect of aging on wood hygroscopicity by 2D 1H NMR relaxometry
- Dynamic vapour sorption protocols for the quantification of accessible hydroxyl groups in wood
- A molecular model for reversible and irreversible hygroscopicity changes by thermal wood modification
- Effect of service life aspects on carbon footprint: a comparison of wood decking products
Artikel in diesem Heft
- Frontmatter
- Editorial
- Wood modification research in Europe
- Review
- Outlook for modified wood use and regulations in circular economy
- Original Articles
- Suitability of a lignin-derived mono-phenol mimic to replace phenol in phenol-formaldehyde resin for use in wood treatment
- Beech wood treated with polyglycerol succinate: a new effective method for its protection and stabilization
- Study on the impregnation quality of rubberwood (Hevea brasiliensis Müll. Arg.) and English oak (Quercus robur L.) sawn veneers after treatment with 1,3-dimethylol-4,5- dihydroxyethyleneurea (DMDHEU)
- The effect of diammonium phosphate and sodium silicate on the adhesion and fire properties of birch veneer
- Enhanced bonding of acetylated wood with an MUF-based adhesive and a resorcinol-formaldehyde-based primer
- Brown rot gene expression and regulation in acetylated and furfurylated wood: a complex picture
- Investigation of the effect of aging on wood hygroscopicity by 2D 1H NMR relaxometry
- Dynamic vapour sorption protocols for the quantification of accessible hydroxyl groups in wood
- A molecular model for reversible and irreversible hygroscopicity changes by thermal wood modification
- Effect of service life aspects on carbon footprint: a comparison of wood decking products