The effects of a heat treatment on the behaviour of extractives in softwood studied by FTIR spectroscopic methods

Mari Nuopponen (Corresponding Author), Tapani Vuorinen, Saila Jämsä, Pertti Viitaniemi

Research output: Contribution to journalArticleScientificpeer-review

102 Citations (Scopus)

Abstract

Scots pine battens were heat-treated at 100–240º C under saturated steam. Cross-sections of heat-treated battens were analysed using ATR and reflection FTIR microscopies. A typical absorption band of fats and waxes at 1740 cm-1 was detected on the sapwood edges in the temperature range of 100–160º C, indicating that fats and waxes moved along the axial parenchyma cells to the surface of the sapwood during the heat treatment. At the elevated temperatures (above 180° C) fats and waxes disappeared from the sapwood surface and were no longer detected with FTIR spectroscopy. Resin acids were detected at temperatures between 100 and 180º C in the middle of the battens. IR spectra of these spots showed a characteristic absorption band of resin acids at 1697 cm-1. At 200º C resin acids were not detected in the middle of the battens; however, resin acids were detected at distances of 500 and 600 mm from the midpoint of the battens and on the edges of battens. At temperatures above 200° C, resin acids had disappeared from the wood.
Original languageEnglish
Pages (from-to)109-115
JournalWood Science and Technology
Volume37
Issue number2
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

resin acids
Softwoods
softwood
resin
Resins
Heat treatment
heat treatment
Waxes
sapwood
wax
Oils and fats
Acids
waxes
acid
fat
Fats
Absorption spectra
temperature
lipids
heat

Keywords

  • pine
  • Scots pine
  • battens
  • heat-treated wood
  • heat treatment
  • wood heat treatment
  • sapwood

Cite this

Nuopponen, Mari ; Vuorinen, Tapani ; Jämsä, Saila ; Viitaniemi, Pertti. / The effects of a heat treatment on the behaviour of extractives in softwood studied by FTIR spectroscopic methods. In: Wood Science and Technology. 2003 ; Vol. 37, No. 2. pp. 109-115.
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abstract = "Scots pine battens were heat-treated at 100–240º C under saturated steam. Cross-sections of heat-treated battens were analysed using ATR and reflection FTIR microscopies. A typical absorption band of fats and waxes at 1740 cm-1 was detected on the sapwood edges in the temperature range of 100–160º C, indicating that fats and waxes moved along the axial parenchyma cells to the surface of the sapwood during the heat treatment. At the elevated temperatures (above 180° C) fats and waxes disappeared from the sapwood surface and were no longer detected with FTIR spectroscopy. Resin acids were detected at temperatures between 100 and 180º C in the middle of the battens. IR spectra of these spots showed a characteristic absorption band of resin acids at 1697 cm-1. At 200º C resin acids were not detected in the middle of the battens; however, resin acids were detected at distances of 500 and 600 mm from the midpoint of the battens and on the edges of battens. At temperatures above 200° C, resin acids had disappeared from the wood.",
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The effects of a heat treatment on the behaviour of extractives in softwood studied by FTIR spectroscopic methods. / Nuopponen, Mari (Corresponding Author); Vuorinen, Tapani; Jämsä, Saila; Viitaniemi, Pertti.

In: Wood Science and Technology, Vol. 37, No. 2, 2003, p. 109-115.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The effects of a heat treatment on the behaviour of extractives in softwood studied by FTIR spectroscopic methods

AU - Nuopponen, Mari

AU - Vuorinen, Tapani

AU - Jämsä, Saila

AU - Viitaniemi, Pertti

PY - 2003

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N2 - Scots pine battens were heat-treated at 100–240º C under saturated steam. Cross-sections of heat-treated battens were analysed using ATR and reflection FTIR microscopies. A typical absorption band of fats and waxes at 1740 cm-1 was detected on the sapwood edges in the temperature range of 100–160º C, indicating that fats and waxes moved along the axial parenchyma cells to the surface of the sapwood during the heat treatment. At the elevated temperatures (above 180° C) fats and waxes disappeared from the sapwood surface and were no longer detected with FTIR spectroscopy. Resin acids were detected at temperatures between 100 and 180º C in the middle of the battens. IR spectra of these spots showed a characteristic absorption band of resin acids at 1697 cm-1. At 200º C resin acids were not detected in the middle of the battens; however, resin acids were detected at distances of 500 and 600 mm from the midpoint of the battens and on the edges of battens. At temperatures above 200° C, resin acids had disappeared from the wood.

AB - Scots pine battens were heat-treated at 100–240º C under saturated steam. Cross-sections of heat-treated battens were analysed using ATR and reflection FTIR microscopies. A typical absorption band of fats and waxes at 1740 cm-1 was detected on the sapwood edges in the temperature range of 100–160º C, indicating that fats and waxes moved along the axial parenchyma cells to the surface of the sapwood during the heat treatment. At the elevated temperatures (above 180° C) fats and waxes disappeared from the sapwood surface and were no longer detected with FTIR spectroscopy. Resin acids were detected at temperatures between 100 and 180º C in the middle of the battens. IR spectra of these spots showed a characteristic absorption band of resin acids at 1697 cm-1. At 200º C resin acids were not detected in the middle of the battens; however, resin acids were detected at distances of 500 and 600 mm from the midpoint of the battens and on the edges of battens. At temperatures above 200° C, resin acids had disappeared from the wood.

KW - pine

KW - Scots pine

KW - battens

KW - heat-treated wood

KW - heat treatment

KW - wood heat treatment

KW - sapwood

U2 - 10.1007/s00226-003-0178-4

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