A comparison of different methods to calculate the surface free energy of wood using contact angle measurements

Gindl, Milojka; Sinn, Gerhard; Gindl, Wolfgang; Reiterer, Alexander; Tschegg, Stefanie

doi:10.1016/s0927-7757(00)00795-0

Cited by 271 publications

(182 citation statements)

References 42 publications

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“…The acid-base approach is considered to be the most effective method for calculating the surface free energy of wood composites in many studies because it provides the greatest accuracy in calculating wood composites surface tension components (Gardner 1996;Gindl et al 2001a;Wålinder and Gardner 2002).…”

Section: Determination Of Surface Free Energy Componentsmentioning

confidence: 99%

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Surface Free Energy and Dynamic Wettability of Differently Machined Poplar Woods

Qin¹,

Gao²,

Zhang³

et al. 2014

BioResources

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The surface free energy and dynamic wettability of wood are important to the performance of its adhesive bonding strength. In this work, the surface free energy of poplar wood samples machined with different processes were calculated by the OWRK (geometric mean) and vOCG (acid-base) methods, and the dynamic wettability of adhesives on wood samples was studied using the S-D wetting model. The results indicate that the contact angles of reference liquids on rotary wood samples were greater than those on planed or sawn wood, and the rotary wood samples were more hydrophobic. The effect of surface roughness on contact angle was insignificant compared with surface structure morphology. The total surface free energy was almost the same for the planed and sawn wood, as calculated by the OWRK and vOCG methods, and the surface free energy of rotary wood samples was lower than that of planed or sawn wood samples. The initial and equilibrium contact angle increased as the viscosity of adhesive increased for all the wood samples, and the contact angles of rotary wood samples were greater than those of planed or sawn wood; however, the K-value was lower. The wettability of the loose side was higher than that of the tight side. Contact angles decreased when surface free energy increased, while the K-value increased.

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Section: Determination Of Surface Free Energy Componentsmentioning

confidence: 99%

“…Surface free energy can be calculated by many methods based on the contact angle of liquids on wood (Gindl et al 2001a). Recently, as well as in the past, much research has been undertaken examining differences in wood surface free energy in relation to the properties of porosity and anisotropy.…”

Section: Introductionmentioning

confidence: 99%

Surface Free Energy and Dynamic Wettability of Differently Machined Poplar Woods

Qin¹,

Gao²,

Zhang³

et al. 2014

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“…An important variable that allows the determination of the ability of wood to interact with liquids is the measurement of the wettability expressed through the contact angles for different types of reference liquids (De Meijer et al, 2000;Gindl et al, 2001;Wolkenhauer et al, 2009). The diffi culties associated with it result from the fact that wood, as porous material, varies in terms of morphological and chemical structure, having different properties within and between species.…”

Section: Introduction 1 Uvodmentioning

confidence: 99%

Surface Wettability of Wood Species from Tropical and Temperate Zones by Polar and Dispersive Liquids

Laskowska

Kozakiewicz

2017

Drvna ind.

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“…Therefore, products should be manufactured with aesthetically appealing surfaces. Surface preparation by processing influences the coating performance and the quality of the final product (Gindl et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Salca¹,

Krystofiak²,

Lis³

et al. 2016

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The objective of this study was to evaluate the adhesion strength and glossiness of black alder wood (Alnus glutinosa Gaertn. L.) coated with water-borne and UV varnishes by two application systems. Prior to coating, the samples were prepared by sanding with four combinations of grit size sandpapers, 180 being the final grit. The surface quality of the specimens was measured with a white light profilometer. Any increase in grit size gradually reduced surface roughness, which further influenced the overall coating performance of the samples. UV varnish applied by roller presented higher adhesion strength and gloss as compared to spraying. The specimens varnished with a water-borne finish by spraying exhibited a better adherence to the substrate than those of UV varnished samples by the same method and provided glossiness at 60° geometry in the same range. These results are valuable for the furniture manufacturing industry for generating a better use and efficiency of secondary wood resources in order to achieve value-added products.

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A comparison of different methods to calculate the surface free energy of wood using contact angle measurements

Cited by 271 publications

References 42 publications

Surface Free Energy and Dynamic Wettability of Differently Machined Poplar Woods

Surface Free Energy and Dynamic Wettability of Differently Machined Poplar Woods

Surface Wettability of Wood Species from Tropical and Temperate Zones by Polar and Dispersive Liquids

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

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