Effects of plasma modification on adhesion properties of wood

Acda, Menandro N.; Devera, E. E.; Cabangon, R. J.; Ramos, Henry J.

doi:10.1016/j.ijadhadh.2011.10.003

Cited by 103 publications

(61 citation statements)

References 24 publications

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“…Plasma-based modification of wood surface using air as the process gas is known to improve wetting characteristics [13][14][15], which enhances the adhesion of coatings and adhesives [16][17][18][19]. Additionally, the uptake characteristics of wooden materials for water and waterbased modification agents are positively affected by plasma modification [20][21][22][23] as well as the penetration depth of adhesives applied to pre-treated wood surfaces [24].…”

Section: Introductionmentioning

confidence: 99%

Plywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties

et al. 2017

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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 resin impregnation. The water and melamine resin uptake and resulting weight percent gain of the veneers were investigated, whereby the air plasma pre-treated veneers showed improved liquid uptake. Five-layer plywood boards were then manufactured and tested for their dimensional stability, compressive strength, bending strength, and tensile strength. Plywood boards made of thermally modified and plasma pre-treated veneers showed a significantly improved dimensional stability, along with small influences on their mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Plywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties

et al. 2017

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“…Both chemical (Gardner and Elder 1988) and mechanical (Aydin 2004) surface treatments have been reported for plywood. In recent years, plasma treatment on wood surfaces has been considered the most effective way to improve adhesion strength (Acda et al 2012). Xie et al (2015) roughened the wood surface to control interaction with another phase by using radio-frequency oxygen plasma.…”

Section: Introductionmentioning

confidence: 99%

“…They found that the plasma treatment would introduce polar chemical groups onto the surface, change the surface morphology, and increase the roughness, all of which improved the interfacial adhesion of the plywood product. Acda et al (2012) studied dielectric barrier discharge (DBD) oxygen plasma treatment on three different wood specimens and found that S. contorta surfaces could be well modified, with greatly enhanced shear strength of adhesive joints. However, the reported plasma treatments on wood surfaces require either low pressure during processing (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effect of Plasma Processing Rate on Poplar Veneer Surface and its Application in Plywood

Chen¹,

Zhang²,

Tang³

et al. 2015

BioResources

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Dielectric barrier discharge (DBD) plasma at atmospheric pressure in air was applied to a poplar veneer surface. Effects of plasma processing rate on surface morphology, chemical property, and surface wettability of the poplar veneer were investigated. The adhesion strength of urea formaldehyde (UF) glued plywood manufactured from the modified veneer was also studied. Atomic force microscopy (AFM), electron spinresonance spectroscopy (ESR), X-ray photoelectron spectroscopy (XPS), contact angle tests, and shear strength tests were carried out. AFM indicated that the surface roughness increased after plasma treatment and was the maximum at a processing rate of 14 m/min. Both ESR and XPS tests showed more oxygen accumulation on the wood surface, forming various oxygen-containing chemical groups. Contact angle tests showed better wetting at a decreased plasma processing rate. Consequently, the adhesion strength of plywood increased after plasma treatment and showed higher strength at lower processing rates.

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“…Plasma treatment has many advantages: compared to conventional wet-chemical surface modification techniques, plasma treatment is a dry, environmentally friendly surface modification without any energy-intensive drying processes or chemical waste (Dilsiz, 1994). It is thought that plasma modification causes increased surface polarity induced by oxidation reaction, leading to the formation of hydroxyl, carboxyl, aldehyde, and other polar functional groups (Acda et al, 2012). The increased surface polarity, obtained with 1-butene liquid, improves wettability and penetration behavior (hydrophilicity) of wood (Acda et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…It is thought that plasma modification causes increased surface polarity induced by oxidation reaction, leading to the formation of hydroxyl, carboxyl, aldehyde, and other polar functional groups (Acda et al, 2012). The increased surface polarity, obtained with 1-butene liquid, improves wettability and penetration behavior (hydrophilicity) of wood (Acda et al, 2012). Several publications also showed that plasma treatment is one of the most effective ways to improve wood wettability and different treatment parameters, which may lead to different surface properties (Custodio et al, 2008;Liu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of plasma treatment and sanding process on surface roughness of wood veneers

Demirkır

Aydın²,

Çolak³

et al. 2014

Turk J Agric For

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An ideal veneer surface is crucial for good panel properties in plywood manufacturing. The aim of this study was to compare plasma treatments and sanding (mechanical) processes with respect to the surface roughness of veneers. Rotary-cut veneers with a thickness of 2 mm from Scots pine (Pinus sylvestris) logs were used as material. After rotary peeling, veneer sheets were dried at 110 °C in a veneer dryer. Veneer sheets were divided into 4 main groups. The surfaces of the control veneer sheets were left untreated. Two different grits of sandpaper, 80 and 180, were used for sanding the surfaces of veneers. Plasma treatment was applied to the last veneer group with 3 different gases (oxygen, nitrogen, and ammonia) and 3 different plasma times (1 min, 5 min, and 15 min). The Mitutoyo Surftest SJ-301 instrument was used to determine surface roughness of samples. Average roughness (Ra), mean peak-to-valley height (Rz), and maximum roughness (Rmax) parameters were measured to evaluate the surface roughness of the samples based on DIN 4768. It was found that the smoothest veneer surfaces were obtained with the sanding processes. Surface roughness values (Rz) of veneer sheets sanded with 180 grit sandpaper were lower than those of veneers sanded with 80 grit sandpaper. Compared with the plasma treatment in terms of surface roughness, plasma-treated veneers had higher Rz values. It was also determined that Rz values were the lowest in the veneers treated with nitrogen plasma. Additionally, the surface roughness values of Scots pine veneers treated with ammonia plasma were a little higher than those of veneer sheets treated with oxygen plasma. The effect of plasma treatment time on surface roughness was not found to be statistically significant.

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Effects of plasma modification on adhesion properties of wood

Cited by 103 publications

References 24 publications

Plywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties

Plywood made from plasma-treated veneers: melamine uptake, dimensional stability, and mechanical properties

Effect of Plasma Processing Rate on Poplar Veneer Surface and its Application in Plywood

Effects of plasma treatment and sanding process on surface roughness of wood veneers

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