Wettability of sapwood and heartwood of thermally modified Norway spruce and Scots pine

Sini Metsä-Kortelainen (Corresponding Author), Hannu Viitanen

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

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 languageEnglish
Pages (from-to)135-139
Number of pages5
JournalEuropean Journal of Wood and Wood Products
Volume70
Issue number1-3
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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wettability
heartwood
sapwood
Pinus sylvestris
Picea abies
Wetting
heat
Water
Wood
Pinus
reference sample
kilns
contact angle
water
Kilns
repellents
Contact angle
Picea
temperature
Temperature

Cite this

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title = "Wettability of sapwood and heartwood of thermally modified Norway spruce and Scots pine",
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.",
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Wettability of sapwood and heartwood of thermally modified Norway spruce and Scots pine. / Metsä-Kortelainen, Sini (Corresponding Author); Viitanen, Hannu.

In: European Journal of Wood and Wood Products, Vol. 70, No. 1-3, 2012, p. 135-139.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Wettability of sapwood and heartwood of thermally modified Norway spruce and Scots pine

AU - Metsä-Kortelainen, Sini

AU - Viitanen, Hannu

PY - 2012

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AB - 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.

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DO - 10.1007/s00107-011-0523-5

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