Testing the Processing-Induced Roughness of Sanded Wood Surfaces Separated from Wood Anatomical Structure

Gurău, Lidia

doi:10.3390/f13020331

Cited by 10 publications

(8 citation statements)

References 28 publications

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“…The roughness of a wood surface is determined by the spacing and height differences between its grooves and ridges, grooves, and holes, as well as grooves and protrusions [ 25 ]. The black lines in Figure 3 reflect the relationship between the original wood roughness and hydrophobicity.…”

Section: Resultsmentioning

confidence: 99%

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

et al. 2023

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To enhance the stability of wood and decrease restrictions on its use in the furniture industry, hydrophobic modification can be employed to confer waterproof, anti-fouling, and self-cleaning properties. The present study outlines the preparation of silica sol using the sol–gel method, followed by impregnation and chemical vapor deposition methods to modify the sol. After grafting 1H,1H,2H,2H-perfluoro-decyl trichlorosilane (FDTS), hydrophobic and superhydrophobic properties were imparted to the wood substrate. To explore the correlation between the surface properties of the wood substrate and superhydrophobic coatings, the densities, porosities, and surface roughness of various tree species were compared. The results showed that the sol–gel method successfully constructed hydrophobic coatings on different wood substrates, with six samples (poplar, elm, toon wood, paulownia, ashtree, and black walnut) achieving superhydrophobic surfaces, with densities ranging from 0.386 to 0.794 g/cm3, porosity ranging from 13.66 to 42.36%, roughness ranging from 4.660 to 11.244 um, and maximum water contact angle of 165.2°. Whereas beech and rosewood only reach the hydrophobic surface. Although the coatings demonstrated good resistance to water, pollutants, self-cleaning, and chemical agents, further improvements are necessary to enhance mechanical wear resistance.

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Section: Resultsmentioning

confidence: 99%

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

et al. 2023

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“…The surface roughness of wood can also be affected by factors such as annual ring variation, density, cell structure, latewood/earlywood ratio and machining (Amorim et al, 2013;Kilic, 2015;Thoma et al, 2015;Zhong, 2021;Gurau, 2022). The results in Table 5 also show that the three months aging contributed to an increase in the surface roughness (Ra value) for the untreated and treated wood samples.…”

Section: Surface Roughnessmentioning

confidence: 95%

Durability and wettability of varnishes on the modified and aged surfaces of short rotation teak wood

Basri

Martha

Damayanti³

et al. 2022

PRT

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Purpose The surface characteristics of thermally and chemically modified wood, such as surface roughness, surface free energy (SFE) and wettability, are important properties that influence further manufacturing processes such as gluing and coating. The aim of this paper was to determine the influence of the surface roughness of thermally and chemically modified teak wood on their SFE, wettability and bonding quality for water-based acrylic and solvent-based alkyd varnishes. In addition, durability against subterranean termites in the field of these modified teak woods was also investigated to give a valuable information for their further application. Design/methodology/approach The woods tested in this study were fast-growing teak woods that were prepared in untreated and treated with furfuryl alcohol (FA), glycerol maleic anhydride (GMA) and thermal. SFE values were calculated using the Rabel method. The wettability values were measured based on the contact angle between varnish liquids and wood surfaces using the sessile drop method, and the Shi and Gardner model model was used to evaluate the wettability of the varnishes on the wood surface. The bonding quality of the varnishes was measured using a cross-cut test based on ASTM 3359-17 standard. In addition, durability against subterranean termites in the field of these modified teak woods was also investigated according to ASTM D 1758-06. Findings The results showed that furfurylated and GMA-thermal 220°C improved the durability of teak wood against termites. The furfurylated teak wood had the roughest surface with an arithmetic average roughness (Ra) value of 15.65 µm before aging and 27.11 µm after aging. The GMA-thermal 220°C treated teak wood was the smoothest surface with Ra value of 6.44 µm before aging and 13.75 µm after aging. Untreated teak wood had the highest SFE value of 46.90 and 57.37 mJ/m2 before and after aging, respectively. The K values of untreated and treated teak wood increased owing to the aging treatment. The K values for the water-based acrylic varnish were lower than that of the solvent-based alkyd varnish. The untreated teak wood with the highest SFE produced the highest bonding quality (grades 4–5) for both acrylic and alkyd varnishes. The solvent-based alkyd varnish was more wettable and generated better bonding quality than the water-based acrylic varnish. Originality/value The originality of this research work is that it provides evaluation values of the durability and SFE. The SFE value can be used to quantitatively determine the wettability of paint liquids on the surface of wood and its varnish bonding quality.

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“…On consideration of the biological characteristics of wood, the roughness of the wood surface can be adjusted by a simple sanding process. , This method is fast and efficient, is not complex, and allows an easy adjustment of the wood surface roughness. The preparation of low-surface-energy surfaces can be achieved by grafting certain hydrophobic reagents.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Durable Hydrophobic/Superhydrophobic Wood Using an Alkyl Ketene Dimer by a Simple and Feasible Method

et al. 2022

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To improve the hydrophobicity of precious hardwood, a facile sanding pretreatment and alkyl ketene dimer (AKD) modification were performed. After the AKD modification, the wood was highly hydrophobic, and the contact angle was 143°. The increased hydrophobicity could be attributed to the ester bond formed between the wood hydroxyl groups and AKD, which was confirmed by attenuated total reflectance–Fourier transform infrared spectroscopy. Sanding pretreatment could further greatly increase the wood hydrophobicity and render it superhydrophobic, not only in a cross-section but also in the tangential and radial sections. The changed wood surface roughness could be responsible for the increased hydrophobicity, which was confirmed by characterization with a scanning electron microscope (SEM) and a three-dimensional optical microscope. Apart from the improved hydrophobicity, the AKD-modified wood exhibited excellent water, acid, and toluene resistance. After a 12 h immersion, the contact angle did not change significantly, and the acid immersion contributed to an improvement in the hydrophobicity of the wood. Furthermore, the resultant AKD-modified wood exhibited an excellent self-cleaning effect.

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Testing the Processing-Induced Roughness of Sanded Wood Surfaces Separated from Wood Anatomical Structure

Cited by 10 publications

References 28 publications

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

Study on the Difference of Superhydrophobic Characteristics of Different Wood Furniture Substrates

Durability and wettability of varnishes on the modified and aged surfaces of short rotation teak wood

Fabrication of Durable Hydrophobic/Superhydrophobic Wood Using an Alkyl Ketene Dimer by a Simple and Feasible Method

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