Densification is a modification technique usually applied to low-density wood species to improve the mechanical properties of the wood. However, densification impairs the wettability abilities of the wood surface and has a negative effect on some properties of the coated substrate. In this study, various physical properties of non-densified and densified common beech (Fagus sylvatica L.) wood were investigated. The densification caused the changes in wood density, moisture content, chemical properties and colour. With the aim of overcoming the negative influence of densification on the surface properties and coatability of wood, plasma pre-treatment was performed. Although the densification impaired the wettability of the wood surface, treatment with plasma increased the surface free energy of both non-densified and densified wood. The improved hydrophilicity of the wood after plasma pre-treatment was also reflected in the improved interactions with the liquid coating. Scanning electron microscope analysis of the coated wood surfaces showed reduced penetration of the coating in densified structure of wood, which negatively affected the adhesion of the coating films. However, the negative effect of densification on the coating adhesion was successfully mitigated by pre-treating the wood with plasma. In conclusion, it was shown that plasma treatment is a promising surface modification technique to achieve a better interaction between densified wood and waterborne coating.

致密化是一种改性技术，通常应用于低密度木材，以改善木材的机械性能。然而，致密化损害了木材表面的润湿性，并且对涂覆的基材的某些性能具有负面影响。在这项研究中，非致密化和致密化的普通山毛榉（Fagus sylvaticaL.）木材进行了调查。致密化导致木材密度，含水量，化学性质和颜色的变化。为了克服致密化对木材的表面性质和可涂布性的负面影响，进行了等离子体预处理。尽管致密化损害了木材表面的可湿性，但是用等离子体处理增加了非致密化和致密化木材的表面自由能。等离子预处理后木材亲水性的提高也反映在与液体涂料的相互作用的改善上。涂覆的木材表面的扫描电子显微镜分析表明，在致密的木材结构中涂层的渗透性降低，这对涂膜的粘附性产生了负面影响。然而，通过用等离子体对木材进行预处理，成功地减轻了致密化对涂层附着力的负面影响。总之，表明等离子体处理是一种有前途的表面改性技术，可以在致密木材和水性涂料之间实现更好的相互作用。