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

机译：FTIR光谱法研究热处理对软木中提取物性能的影响

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摘要

Scots pine battens were heat-treated at 100-240 ℃ 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 100-160 ℃, 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 ℃) 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 180 ℃ in the middle of the battens. IR spectra of these spots showed a characteristic absorption band of resin acids at 1697 cm~(-1). At 200 ℃ 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 ℃, resin acids had disappeared from the wood.
机译：苏格兰松木条板在100-240℃和饱和蒸汽下进行热处理。使用ATR和反射FTIR显微镜分析了经过热处理的板条的横截面。在100-160℃的温度下，边材边缘出现了典型的脂肪和蜡在1740 cm〜（-1）的吸收带，表明脂肪和蜡沿轴向薄壁核细胞向边材表面移动。热处理。在升高的温度（180℃以上）下，边材表面上的脂肪和蜡消失，并且不再用FTIR光谱法检测到。在板条中间，在100至180℃的温度下检测到树脂酸。这些斑点的红外光谱显示出在1697 cm〜（-1）处树脂酸的特征吸收带。在200℃时，在板条中间未检测到树脂酸。然而，在距板条中点和板条边缘500和600 mm处检测到树脂酸。在200℃以上的温度下，树脂酸已从木材中消失。

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  • 来源
    《Wood Science and Technology》 |2003年第2期|p. 109-115|共7页
  • 作者

    Mari Nuopponen; Tapani Vuorinen; Saila Jamsa; Pertti Viitaniemi;

  • 作者单位

    Laboratory of Forest Products Chemistry, Helsinki University of Technology, P.O. Box 6300, FIN-02015 HUT, Finland;

    Laboratory of Forest Products Chemistry, Helsinki University of Technology, P.O. Box 6300, FIN-02015 HUT, Finland;

    VTT Building Technology, P.O. Box 1806, FIN-02044 VTT, Finland;

    VTT Building Technology, P.O. Box 1806, FIN-02044 VTT, Finland;

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  • 正文语种 eng
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