Abstract
The European beech (Fagus sylvatica L.) wood was thermally modified in the presence of paraffin at the temperatures of 190 or 210 °C for 1, 2, 3 or 4 h. A significant increase in its resistance to the brown-rot fungus Poria placenta (by 71.4%–98.4%) and the white-rot fungus Trametes versicolor (by 50.1%–99.5%) was observed as a result of all modification modes. However, an increase in the resistance of beech wood surfaces to the mold Aspergillus niger was achieved only under more severe modification regimes taking 4 h at 190 or 210 °C. Water resistance of paraffin-thermally modified beech wood improved—soaking reduced by 30.2%–35.8% and volume swelling by 26.8%–62.9% after 336 h of exposure in water. On the contrary, its mechanical properties worsened—impact bending strength decreased by 17.8%–48.3% and Brinell hardness by 2.4%–63.9%.
Highlights
European beech (Fagus sylvatica L.) is one of the most popular commercial broad leaved tree species in Central Europe [1,2]
All paraffin-thermal modifications of beech wood specimens resulted in an increase in their rot resistance (Table 1)
The highest weight losses (∆m) caused by wood-decaying fungi were observed in the case of the reference beech specimens (22.14% with Poria placenta and 29.65% with Trametes versicolor)
Summary
European beech (Fagus sylvatica L.) is one of the most popular commercial broad leaved tree species in Central Europe [1,2]. In comparison to standard thermal modification of wood in hot air, higher resistance to decaying-fungi and water is ensured when hot plant oils and other hydrophobic agents are applied [12,13,14,16,17,18]. Candle-making business, civil engineering, as well as in preservation of wood materials in order to Paraffin belongs to the group of waxes It is a mixture of solid linear aliphatic hydrocarbons, reduce the hygroscopicity and to improve the dimensional stability. Theevaluate aim of the was to determine the effect mechanical of thermal modification beech wood in the presence of paraffin in order to increase its resistance to rot, mold and water and
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