Modification of Sugar Maple (Acer saccharum) and Black Spruce (Picea mariana) Wood Surfaces in a Dielectric Barrier Discharge (DBD) at Atmospheric Pressure

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

“…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].…”

Effect of Wood Surface Modification by Atmospheric-Pressure Plasma on Waterborne Coating Adhesion

“…Previously, several plasma-treated wood species have been investigated, including common northern species such as maple (Blanchard et al 2009;Busnel et al 2010), pine , spruce, poplar, and chestnut (Zanini et al 2008) as well as more exotic species like coconut palm and eucalyptus (Blantocas et al 2007). In addition to the wood species and the nature of the plasma gas, other variables of importance are the conditioning and finishing of the wood.…”

“…The effect of a specific plasma treatment is often characterized using contact angle analysis (Asandulesa et al 2010;Blanchard et al 2009;Busnel et al 2010;Evans et al 2007;Podgorski et al 2000;2001b;Rehn et al 2003;Zanini et al 2008) and adhesion tests (Blanchard et al 2009;Busnel et al 2010;Evans et al 2007;Kim et al 2009;Nussbaum 1999;Rehn et al 2003). Regarding the effect of atmospheric air plasma treatment, Avramidis et al (2012) found that there was little change in surface energy of pine wood, but that extractives were oxidized at the surface, according to XPS measurements.…”

“…In a general review on atmospheric plasma treatments of polymer surfaces, Williams and Hicks (2013) state that while surface wetting is necessary, it is not sufficient to determine whether a surface is optimally activated for adhesion. Other types of analyses include water droplet absorption tests (Blantocas et al 2007;Manolache et al 2008;Wolkenhauer et al 2007), permeability tests (Chen and Zavarin 1990), X-ray photoelectron spectroscopy (XPS) Busnel et al 2010), and atomic force microscopy (Mahlberg et al 1999). For example, using XPS, Klarhöfer et al (2010) showed that dielectric barrier discharges (DBD) at atmospheric pressure in oxygen oxidized lignin, while those operated in argon reduced both lignin and cellulose.…”

“…Delamination tests have shown that coating adhesion increases after plasma treatment. Busnel et al (2010) examined the effect of DBD treatments on sugar maple and black spruce. The plasma gases used were Ar, O2, N2, CO2, and mixtures thereof.…”