Abstract
In this research, the effect of thermal modifications at 170°C, 190°C,
210°C and 230°C on the wettability of sapwood and heartwood of Scots
pine (Pinus sylvestris) and Norway spruce (Picea abies)
was studied by measuring the static contact angles of distilled water
on the surfaces as a function of time. The results were compared to
industrially kiln-dried reference samples. The thermal modification at
the lower temperatures of 170°C and 190°C increased the wettability of
all wood materials with the exception of the heartwood of pine that had
been thermally modified at 170°C, which was the most water-repellent
material in the whole study. Thermal modification at the very high
temperature of 230°C was needed to decrease the wettability of wood. The
differences in water repellency between sapwood and heartwood were
greater for pine than for spruce.
Original language | English |
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Pages (from-to) | 135-139 |
Journal | European Journal of Wood and Wood Products |
Volume | 70 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2012 |
MoE publication type | A1 Journal article-refereed |