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Article
Comparison of different treatments based on glycerol or polyglycerol additives to improve properties of thermally modified wood
Impregnation of European beech (Fagus sylvatica) with 10% w/w aqueous solution of different additives made from the reaction of glycerol or polyglycerol with glycidyl methacrylate or maleic anhydride followed by ...
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Article
Prediction of modulus of elasticity in static bending and density of wood at different moisture contents and feed rates by drilling resistance measurements
An IML-RESI PD 400 drilling tool and a standard spade drill bit were used to find the correlations of drilling and feeding resistance with the modulus of elasticity in static bending and density of wood. In to...
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Article
Density and density profile changes in birch and spruce caused by thermo-hydro treatment measured by X-ray computed tomography
Birch and spruce samples were scanned using X-ray computed tomography (CT) to determine changes in the density and density profile caused by thermo-hydro treatment (THT). Small-dimension wood blocks were subje...
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Article
Coating performance on glutaraldehyde-modified wood
Scots pine (Pinus sylvestris L.) panels were modified with glutaraldehyde (GA) to various weight percent gains and subsequently coated with several commercial coatings. The drying rate and adhesion of the coating...
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Article
Penetration depth of phenol-formaldehyde (PF) resin into beech wood studied by light microscopy
Using light microscopy (LM), the distribution and penetration depth of phenol–formaldehyde (PF) resin into wood specimens were examined after the seventh dry–wet cycle following the anti-swelling efficiency me...
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Article
The influence of curing conditions on properties of melamine modified wood
The curing conditions influence the material properties of wood modified with methylated melamine formaldehyde resin. To identify the most influential parameters, the process conditions were varied separately....
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Article
Modification of beech veneers with lignin phenol formaldehyde resins in the production of laminated veneer lumber (LVL)
Rotary cut beech (Fagus sylvatica L.) veneers were treated with four different lignin phenol formaldehyde (LPF) solutions using dimethyl sulfoxide (DMSO) as a solvent. Four of these veneers were bonded with PF ad...
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Article
Hydrophobic recovery of atmospheric pressure plasma treated surfaces of Wood-Polymer Composites (WPC)
In this study, the behavior of atmospheric pressure plasma treated surfaces of Wood-Polymer Composites (WPC) was investigated as a function of time and environmental conditions. The surfaces of injection molde...
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Article
Open AccessPlywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties
This study investigates the dimensional stability and mechanical properties of plywood boards made of thermally modified and unmodified beech veneers that have undergone plasma pre-treatment before melamine re...
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Article
Exploring the potential of high resolution mass spectrometry for the investigation of lignin-derived phenol substitutes in phenolic resin syntheses
Chemical degradation is an efficient method to obtain bio-oils and other compounds from lignin. Lignin bio-oils are potential substitutes for the phenol component of phenol formaldehyde (PF) resins. Here, we d...
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Article
Thermally modified Scots pine and Norway spruce wood as substrate for coating systems
Thermally modified wood (TMW) is increasingly used in exterior applications as an alternative to tropical hardwoods or wood impregnated with biocides. Despite its enhanced biological durability and dimensional...
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Article
Thermo-oxidative decomposition and combustion behavior of Scots pine (Pinus sylvestris L.) sapwood modified with phenol- and melamine-formaldehyde resins
Modification of wood with phenol-formaldehyde (PF) and melamine-formaldehyde (MF) resins is known as an efficient strategy to improve wood’s dimensional stability, mechanical strength, and durability. This stu...
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Article
Residual strength of thermally modified Scots pine after fatigue testing in flexure
Scots pine (Pinus sylvestris) was thermally modified and its residual strength after cyclic bending was tested. Asymmetric sinusoidal cyclic oscillations at 20 Hz frequency and load ratio p = 0.3 were conducted. ...
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Article
Wood moisture content during the thermal modification process affects the improvement in hygroscopicity of Scots pine sapwood
Elevated wood moisture contents during the thermal modification process have been shown to adversely affect the improvement in dimensional stability and hygroscopicity. This study tested the hypothesis that th...
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Article
Wood degradation affected by process conditions during thermal modification of European beech in a high-pressure reactor system
The degradation of beech wood during a thermal modification process in a high-pressure reactor system using steam as medium was investigated. The wood was modified at different peak temperatures (150–180 °C), ...
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Article
Photodegradation of thermally-modified Scots pine and Norway spruce investigated on thin micro-veneers
The exposure to ultraviolet light results in surface photodegradation of uncoated wood during exterior application. When using thermally-modified wood in exterior applications, chemical changes that occur duri...
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Article
Water uptake and wetting behaviour of furfurylated, N-methylol melamine modified and heat-treated wood
This study reports on the water uptake (WU) and wetting properties of different modified wood materials; furfurylated and N-methylol melamine (NMM) modified Scots pine, and heat-treated (Vacu3 method) Scots pine ...
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Article
Gross adhesive penetration in furfurylated, N-methylol melamine-modified and heat-treated wood examined by fluorescence microscopy
This study investigated the radial penetration of three conventional cold-set wood adhesives [emulsion polymer isocyanate (EPI), poly (vinyl acetate) (PVAc), one-component polyurethane (PU)] into various degre...
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Article
Improved DMDHEU uptake of beech veneers after plasma treatment at atmospheric pressure
This study investigated the effect of a plasma treatment at atmospheric pressure on the absorption characteristics of beech veneers by using a dielectric barrier discharge on the DMDHEU (1,3-dimethylol-4,5-dih...
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Article
Modification of three hardwoods with an N-methylol melamine compound and a metal-complex dye
This study evaluated the combined modification and staining of ash, beech and maple wood with a low molecular weight N-methylol melamine compound (NMM) and a metal-complex dye. Wood samples were treated with aque...
