松木树脂特性分析是了解和防止木材渗出的途径

IF 1 Q3 ENGINEERING, MULTIDISCIPLINARY
Errj Sansonetti, Dace Cirule, Edgars Kuka, Kristine Meile
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引用次数: 0

摘要

树脂的一个主要功能是通过在受攻击或受损区域释放树脂流来防御外部攻击。尽管如此,表面树脂的泄漏会对木材材料产生负面的美学和经济影响。本研究的目的是探讨哪些处理会影响树脂的化学物理性质,以阻止木材表面的渗出。为了实现树脂的增稠,必须去除挥发性松节油,并且在这个方向上进行了一些研究,提供了有关该过程的有用信息。分别在60℃、100℃和150℃的不同温度下进行热处理,得到不同的质量损失,从而证实松节油可以在树脂中长时间保留,其结构、形态和化学性质的变化都受到温度的影响。热处理前后的FTIR光谱显示化学结构没有大的变化。然而,在UHPLC-DAD-MS分析的样品中,观察到20种化合物的比例存在显著差异,这些化合物表征了可能的化学反应,如分解、脱氢、氧化和异构化。热处理后树脂的玻璃化转变温度升高。颜色变化是明显的:树脂随着处理温度的升高而变深,除了树脂在100°C加热。热处理引起的树脂成分的化学变化有待进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of Pine Resin Properties as a Way to Understand and Prevent Exudation from Wood Material
A major function of resin is to provide defense against external attacks by releasing the resin flow on the attacked or damaged area. Nonetheless, the leakage of the resin on the surface can have a negative aesthetic and economic impact on wood material. The aim of this study is to investigate which treatments affect the chemo-physical properties of the resin in order to hinder the exudation on wood surface during service. To achieve a thickening of the resin, it is necessary to remove the volatile turpentine, and several studies have been carried out in this direction, providing useful information about this process. The heat treatment at different temperatures, 60°C, 100°C and 150°C, respectively, gives different mass losses, thus confirming that the turpentine can remain for long time in the resin, and the changes in structural, morphological, and chemical properties are affected by the temperature. FTIR spectroscopy, before and after thermal treatment, does not show major changes in chemical structures. However, from the samples analyzed with UHPLC-DAD-MS significant differences of the ratios of 20 compounds were observed, which characterize possible chemical reactions, such as decomposition, dehydrogenation, oxidation and isomerization. After heat treatment, the glass transition temperature of resin increased. Color changes are evident: resin becomes darker with increasing the temperature of treatment, apart from the resin heated at 100°C. The chemical changes in the composition of the resin caused by heat treatment need further investigation.
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来源期刊
Advances in Science and Technology-Research Journal
Advances in Science and Technology-Research Journal ENGINEERING, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
27.30%
发文量
152
审稿时长
8 weeks
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