The aim of the thesis was to determine the properties of polyvinyl alcohol (PVA) coating with the addition of nanocellulose and without it with regard to protecting wood surfaces, and the impact of nanocellulose on the mechanical properties of the coating. We used six different coatings, which were applied in two thicknesses, namely 240 μm and 360 μm. We used coatings with a 10, 15 and 20% concentration of PVA in water and 5% addition of nanocellulose. The samples which we applied the coatings on were made from spruce and beech wood. One sample from each wood was untreated and served as a control sample. We determined the selected properties of the surface systems that formed. The tests of some of the properties showed the impact of the addition of nanocellulose and a higher content of PVA in the coating with regard to achieving better mechanical or resistance properties, while some properties were not affected by the enhanced properties of the surface system. The addition of nanocellulose had a positive effect on the adhesion of coatings and on the resistance to micro-destruction. However, the addition of nanocellulose did not have a clear effect with regard to improving the other properties that were examined. In fact, the addition of nanocellulose weakened the resistance against cold liquids. The results show that a higher proportion of PVA does not necessary provide better surface properties. A thicker coating also does not necessarily lead to better properties than a thinner one.
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