Sanding vs. plasma treatment of aged wood: A comparison with respect to surface energy

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

“…This occurs when the interfacial tension (γ SL ) is 0. Good adhesion is obtained if the dispersive and polar parts of the solid and liquid phases are in the right ratio, because only dispersive -dispersive and polar -polar interactions occur (Wolkenhauer et al, 2009). Therefore, the work of adhesion can be divided into a dispersive and a polar part according to the equation: (5) where:…”

“…For that reason, wood shows high affi nity for water. This property of wood is described by a number of parameters including adsorption, desorption, swelling, water absorption, wettability expressed by the measurement of the contact angle (Mantanis et al, 1994;Wolkenhauer et al, 2009; Buyuksari et al, 2011; Dündar et al, 2012;Hill et al, 2012). …”

“…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.…”

“…Wettability of wood is described by a number of parameters, of which the most studied and analysed are contact angle and surface free energy. Only a few authors examine wetting energy, spreading coeffi cient of reference liquid, work of adhesion for the phase boundary wood-liquid, surface tension of the liquid (Zhang et al, 1997;Kocaefe et al, 2008;Wolkenhauer et al, 2009;Gonzalez de Cademartori et al, 2015).…”

Gozd in les: 70 let

“…Do sedaj je bilo veliko raziskav izvedenih na temo obnašanja tekočin na tako modificiranih površinah, v smislu merjenja kontaktnih kotov in določanja proste površinske energije s plazmo obdelanih površin lesa Wolkenhauer et al, 2015). V naši raziskavi smo želeli ugotoviti, kako obdelava površine lesa z dielektrično barierno razelektritveno (DBD) plazmo v zraku pri atmosferskem tlaku vpliva na omočitev površin in oprijemnost vodnega površinskega premaznega sistema.…”