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

Laskowska, Agnieszka; Kozakiewicz, P.

doi:10.5552/drind.2017.1704

Cited by 12 publications

(10 citation statements)

References 20 publications

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“…The results of this work are slightly higher than those reported by Amorim et al (2013), in which the author in a study carried out with surface wettability and roughness of Virola michelli and phenol-formaldehyde adhesive observed mean contact angle values of 82.5 and 81.1°, to 5 and 55 seconds, respectively. As verified by the author and also in this work, initially the contact angle decreased rapidly (spreading phase), however, over time the contact angle slowly reduces and finally reaches equilibrium (diffusion phase) (Laskowska;Kozakiewicz, 2017).…”

Section: Mechanical Characterization Of the Glulam Beams Of Rubberwoodsupporting

confidence: 76%

Physical and mechanical behavior of glulam beams produced with rubberwood treated with preservatives

et al. 2020

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This work aimed to evaluate the physical and mechanical behavior of glued laminated timber (GLT) - glulam pieces of Hevea brasiliensis treated with chromed copper arsenate (CCA), chromed copper borate (CCB) and pyrethroid in the production of GLT. The pieces were produced using three wooden laminae with dimensions of 60 x 20 x 1200 mm, (width x thickness x length), joined with epoxy adhesive under 1.0 MPa pressure for 24h at room temperature. The rubberwood had an apparent density of 0.624 g cm-3, a value close to that of Eucalyptus grandis wood, a species traditionally used in the manufacture of GLT. Regarding the GLT parts, it was observed that the preservative treatment with CCA and CCB influenced negatively the values of the mechanical properties. For resistance modulus (MOR), a reduction of 75.44 MPa to 62.36 and 58.57 MPa was found for the parts untreated and treated with CCA and CCB, respectively. There was no statistical difference for surface treatment with pyrethroid. The photomicrographs of the glue line showed that the reduction in these values was mainly due to the penetration of preservative solutions into the wood structure (cell lumens and vessels or pores), impairing the anchoring of the adhesive.

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Section: Mechanical Characterization Of the Glulam Beams Of Rubberwoodsupporting

confidence: 76%

Physical and mechanical behavior of glulam beams produced with rubberwood treated with preservatives

et al. 2020

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“…d − x 1 d ) as well (Table 6). In order to obtain the optimal adhesion, SFE of interphase should be minimal (tends to zero), work of adhesion should be maximal and wetting coefficient should be as close to zero or positive [9,20,26,[54][55][56]. Figure 3 shows an adhesion performance results and rank of all investigated combinations for the above mentioned parameters.…”

Section: Adhesion Performance Based On Surface Free Energiesmentioning

confidence: 99%

Enhancement of Polyvinyl Acetate (PVAc) Adhesion Performance by SiO2 and TiO2 Nanoparticles

et al. 2019

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Post press processes include various types of bonding and adhesives, depending upon the nature of adherends, the end use performance requirements and the adhesive bonding processes. Polyvinyl acetate (PVAc) adhesive is a widely used adhesive in the graphic industry for paper, board, leather and cloth. In this study, the enhancement of PVAc adhesion performance by adding different concentrations (1%, 2% and 3%) of silica (SiO2) and titanium dioxide (TiO2) nanoparticles was investigated. The morphology of investigated paper-adhesive samples was analyzed by SEM microscopy and FTIR spectroscopy. In addition, the optimal adhesion at the interface of paper and adhesive was found according to calculated adhesion parameters by contact angle measurements (work of adhesion, surface free energy of interphase, wetting coefficient). According to obtained surface free energy (SFE) results, optimum nanoparticles concentration was 1%. The wettability of the paper-adhesive surface and low SFE of interphase turned out as a key for a good adhesion performance. The end use T-peel resistance test of adhesive joints confirmed enhancement of adhesion performance. The highest strength improvement was achieved with 1% of SiO2 nanoparticles in PVAc adhesive.

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“…The contact angle at this time is called the equilibrium contact angle. The contact angle drop rate is the difference of initial contact angle and final contact angle, and then divide by the initial contact angle [29][30][31]. parameter of Sm of the mahogany wood is smaller than that of the modified poplar.…”

Section: Effect Of Different Sandpaper Types On Wettabilitymentioning

confidence: 99%

Effect of Sanding Processes on the Surface Properties of Modified Poplar Coated by Primer Compared with Mahogany

Liu

Gao

2020

Coatings

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The surface roughness, static and dynamic liquid wettability of modified poplar wood were measured by different surface treatment of brushing primer and sanding. With the increase of the number of grinding paper, the depth parameters Ra, Ry, Rz and Rp of surface roughness of modified poplar decreased, and the density parameter Sm (the average spacing of micro unevenness of contour) decreased at first and then increased. With the increase of number of the grinding paper, the contact angle of water and glycerol for modified poplar wood decreased at first and then increased. After the modified poplar wood was brushed with the primer and sanded with 240# sandpaper, the density parameter Sm was 0.307, the equilibrium contact angle of distilled water was 34.88, and the equilibrium contact angle of glycerin was 36.46, all of which were the lowest number. At this time, the surface roughness was improved, and the modified poplar has the good wettability that is greater than the mahogany wood wettability. Compared with mahogany, the rough depth parameters of the modified poplar are smaller to those of mahogany, but the Sm of modified poplar wood is greater than that of the mahogany. After the same surface pretreatment, the wetting speed of glycerol on the surface of mahogany is higher than that of the modified poplar.

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

Cited by 12 publications

References 20 publications

Physical and mechanical behavior of glulam beams produced with rubberwood treated with preservatives

Physical and mechanical behavior of glulam beams produced with rubberwood treated with preservatives

Enhancement of Polyvinyl Acetate (PVAc) Adhesion Performance by SiO2 and TiO2 Nanoparticles

Effect of Sanding Processes on the Surface Properties of Modified Poplar Coated by Primer Compared with Mahogany

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