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

Abstract

In this study, the effect of an atmospheric-pressure plasma treatment on the surface properties of sugar maple (Acer saccharum March.) and black spruce (Picea mariana (Mill.) was analyzed by contact angle measurement and a water-based coating pull-off testing. The plasma gases used were Ar, N2, CO2, and air. It was found that the wettability with water and the coating adhesion of maple and spruce can be highly influenced by the nature of the plasma gas used and the plasma treatment time. For example, in the case of sugar maple, coating adhesion increased by 66% after 1.5 s of exposure to argon plasma. Repetition of the contact angle measurement one and two weeks after the initial plasma treatment showed that the plasma-induced modification is not permanent. Improvements in wettability and adhesion were also obtained with simpler, cheaper air plasmas, a result promising for the development of advanced plasma reactors operating at atmospheric pressure, specially designed for the wood industry.

Evaluation of wood surface coating performance using water based, solvent based and powder coating

“…In the different heat treatment application, coating hardness and scratch resistance decreased for the all wood species. Rield et al (2014) used to determine the effect of atmospheric pressure plasma treatment on wood surface coating performance using contact angle measurement and pull off testing. The results showed that type of plasma gases and treatment time were significant factors on the wettability and adhesion strength for maple and spruce wood samples.…”

Gozd in les: 70 let

“…Obdelava lesa in lesnih kompozitov s plazmo predstavlja enega od načinov za spremembo lastnosti površin (Wolkenhauer et al, 2008;Demirkir et al, 2014), na katere lahko z namenom povečanja površinske zaščite materiala nanesemo različne premaze (Riedl et al 2014). 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).…”

Modification of hardwood samples in the flowing afterglow of N2–O2 dielectric barrier discharges open to ambient air

“…1. This system was described in details in a previous publication (Prégent et al 2014;Riedl et al 2013). The system is open to ambient air and produces a spatially uniform or filamentary discharge between two quartzcovered circular metallic electrodes, having an area of 285 cm 2 , a diameter of 19 cm, and a 0.14 cm interelectrode gap.…”