Evaluation of wood surface coating performance using water based, solvent based and powder coating

Hazır, Ender; Koç, Küçük

doi:10.4067/s0718-221x2019005000404

Cited by 7 publications

(7 citation statements)

References 17 publications

(15 reference statements)

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“…The distributions of the coatings on and within the veneer were observed using X-ray microtomography. The visibility of the coating, which was successfully visualized using X-ray microtomography, could have been caused by the high number of ions in its chemical composition, which is in accordance with the results of a preliminary study by Ekaputri et al 8 . The coating and woody materials are visible and clearly distinguished.…”

Section: Resultssupporting

confidence: 88%

Quantitative analysis of commercial coating penetration into Fagus crenata wood using X-ray microtomography

Ekaputri,

Tanaka

2024

Sci Rep

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Recent advances in wood treatment include the use of eco-friendly coatings to improve the wood’s dimensional stability and appearance. Assessing coating performance during its service life is critical for establishing a knowledge base for product optimization. Numerous approaches, including microimaging, are available for analyzing coating behavior. In addition to conventional microscopic techniques, high-resolution X-ray microtomography is a tool that provides nondestructive imaging of coatings and their substrates. In this study, we performed two-dimensional (2D) and three-dimensional (3D) visualization of tomographic reconstruction images of two coating types, spray and brush, to observe and assess the distribution of several commercial Japanese coating materials in Fagus crenata. X-ray images and plot profiles were used to determine the penetration depths and thicknesses of coatings. Each coated sample was scanned using X-ray microtomography, which allowed successful visualization and quantification of the coating penetration depth. Chemical content and concentration of the coating materials influenced penetration depth and amount.

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Section: Resultssupporting

confidence: 88%

Quantitative analysis of commercial coating penetration into Fagus crenata wood using X-ray microtomography

Ekaputri,

Tanaka

2024

Sci Rep

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“…This does not diverge from the practical data well known from works [3,9], the authors of which, by the way, also associate a decrease in the quality of wood coating with a change in structural composition. But, unlike the results of studies published in [7,18,19], the obtained data on the effect of thermal modification on the properties of wood, in particular, on degassing, suggest the following:…”

Section: Discussion Of Results Of the Study Of Polymer Shell From Pow...contrasting

confidence: 74%

“…The purpose of study [7] was to evaluate the effectiveness of surface coating using an aqueous base, solvent base, and powder coating on medium-density fiberboard. The coating efficiency was evaluated using adhesion strength, surface hardness, layer thickness -dispersion analysis.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining patterns in the formation of a polymer shell by powder paint on wood surface

Tsapko

Likhnyovskyi²,

Buiskykh

et al. 2023

EEJET

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An issue related to using wood and wood products for building structures is to ensure their stability and durability during operation within wide limits. Therefore, the object of this study was a change in the properties of the polymer shell of powder paint on wood during thermal modification. It is proved that in the process of thermal modification of wood, its structure changes, and accordingly, during the polymerization of powder paint, degassing occurs, which affects the polymer shell. Namely, during the thermal polymerization of powder paint at a temperature of 180 °C for untreated wood, shallow bubbles and craters are characteristic of the formed polymer shell. Instead, a smooth surface is marked for a sample of thermally modified wood. Thermogravimetric analysis data show thermogravimetric curves characterized by the loss of mass of the sample of the original wood with increasing temperature due to the processes of dehydration, destruction of hemicellulose and lignin. This is dehydration, accompanied by the destruction of the pyranose cycle, and carbonization to form a carbon residue and a complex mixture of volatile products. Due to this, bubbles and craters are formed in the polymer shell of the coating. Based on the obtained results of adhesion of the polymer shell on wood, which is treated with a mixture of epoxy polyester system with functional additives and a polymerization temperature of 180 °C, the adhesion level is 2.1 MPa. Reducing the polymerization temperature of a mixture of the epoxy polyester system with functional additives to 130 °C increases adhesion by 1.75 times, and the nature of the destruction passes through the polymer shell. For thermally modified wood, the level of adhesion is within 2.1 MPa, and the destruction takes place through the wood. This is due to the increased fragility of the surface after thermal modification of wood

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“…Pull-off adhesion strengths comparable to the adhesion of some commercial organic-based coatings were obtained with CF1, CF7 and CF10-CF12. Adhesion strength values reported in the literature for wood coatings generally range from 2 to 5 MPa, but can reach up to 10 MPa for high performance coatings [23][24][25]. Based on observations of six polyurethane coatings, Oblak and co-authors [26] suggested a minimum acceptable adhesion value of 2.5 MPa for wood, and more than 5 MPa for excellent adhesion.…”

Section: Coating Performancesmentioning

confidence: 99%

Study of the Adhesion of Silicate-Based Coating Formulations on a Wood Substrate

et al. 2021

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Silicate coatings are environmentally friendly inorganic-based products that have long been used for mineral substrates and protection of steel against corrosion. The development and acceptance of these coatings in the wood sector require some adjustments in formulations or special preparation of the surface to be coated to obtain durable finishes. In this work, the adhesion of various silicate-based formulations to a beech wood substrate (Fagus sylvatica L.), was assessed with the main objective to study relevant parameters and potential improvements. Adhesion strength was determined by pull-off and cross-cut tests. Other coating properties such as scratch, impact, and water resistance were also determined. Surface roughness and interface were analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM), and coating curing was studied by attenuated total reflection-infrared spectroscopy (ATR FTIR). The results showed that adhesion was highly dependent on formulation, penetration of the coatings into wood, and mechanical anchoring. Increasing the content of solid particles in the coating formulations or adding a polyol (glycerol, xylose), which probably acted as a coalescent, considerably decreased the adhesion strength, probably by blocking penetration into the wood by forming aggregates. Adhesion was improved by pre-mineralization of the surface, and substitution of a part of the potassium silicate binder with potassium methyl siliconate reduced the formation of cracks caused by dimensional instability of the wood.

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Evaluation of wood surface coating performance using water based, solvent based and powder coating

Cited by 7 publications

References 17 publications

Quantitative analysis of commercial coating penetration into Fagus crenata wood using X-ray microtomography

Quantitative analysis of commercial coating penetration into Fagus crenata wood using X-ray microtomography

Determining patterns in the formation of a polymer shell by powder paint on wood surface

Study of the Adhesion of Silicate-Based Coating Formulations on a Wood Substrate

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