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Compositions of compounds extracted from thermo-treated wood using solvents of different polarities

机译：使用不同极性的溶剂从热处理木材中提取的化合物的成分

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Abstract: How well modified wood products perform may be influenced by their chemical compositions. Wood extractives are nonstructural constituents, many with specific biological properties, which affect the color, fragrance, hygroscopicity, durability, and acoustic properties and the drying and adhesion processes of wood. However, incomplete information is available on the extraction techniques and potential use of extractives as value-added chemical products. The main goal of this research was to explore the effects of thermo-vacuum treatment of Deodar cedar (Cedrus deodara Roxb.) and Italian alder (Alnus cordata Desf.) woods on the content and composition of extractives. Solvents with different polarities were used, including water, hexane, dichloromethane, methanol, and a benzene/ethanol mixture. Component groups in extracts were determined by gas chromatography in combination with mass spectrometry. Regardless of the treatment and solvent, the most representative extracts to be obtained from alder were acids/esters, whereas hydrocarbons were most frequently obtained from cedar. Our results revealed an interesting differential species-specific effect of solvents on the composition of extracts. Aside from benzene/ethanol, greater amounts of extracts were obtained from treated than from untreated alder, whereas the opposite was true for cedar, aside from methanol.
机译：摘要：改性木制品的性能如何可能受到其化学成分的影响。木材提取物是非结构性成分，许多具有特定的生物学特性，它们会影响木材的颜色，香气，吸湿性，耐久性和声学特性以及木材的干燥和粘合过程。但是，关于萃取技术以及萃取剂作为增值化学产品的潜在用途的信息不完整。这项研究的主要目的是探讨热真空处理Deodar雪松（Cedrus deodara Roxb。）和意大利and木（Alnus cordata Desf。）木材对提取物含量和组成的影响。使用具有不同极性的溶剂，包括水，己烷，二氯甲烷，甲醇和苯/乙醇混合物。通过气相色谱结合质谱法测定提取物中的组分组。无论处理方法和溶剂如何，从al木中获得的最具代表性的提取物是酸/酯，而碳氢化合物则最常从雪松中获得。我们的结果揭示了溶剂对提取物成分的不同物种特异性作用的有趣差异。除苯/乙醇外，经处理的der木提取物的提取物比未经处理的greater木提取物的提取量大，而对于雪松，除甲醇外，提取物的提取率也相反。

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