离子液体辅助提取<i>金钟柏</i>（Hiba）精油,ACS Omega

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离子液体辅助提取金钟柏（Hiba）精油
ACS Omega ( IF 3.7 ) Pub Date : 2020-11-05 , DOI: 10.1021/acsomega.0c04860
Aisya Syahmina ₁ , Toyonobu Usuki ₁

Affiliation

由于木材对真菌和白蚁的抵抗力，青森hiba（Thujopsis dolobrata）一直用作建筑材料。此外，hiba木材的香精油具有令人放松的木质香气和抗真菌特性，并且主要由（-）-thujopsene，雪松酚和酚组成。蒸汽蒸馏是获得油的主要工业方法，但需要大量的水和热能。本研究描述了使用溶解纤维素的[C ₂ mim] [（MeO）（H）PO ₂ ]离子液体（IL）来有效提取希巴油。作为一种控制方法，使用己烷Et ₂萃取有机溶剂O或EtOAc在80°C进行1小时。本研究中开发的使用IL的方法是在与对照方法相同的温度和时间下进行的，并且依赖于使用IL将木材部分溶解，然后再将hiba油分配到有机溶剂中进行分析。使用气相色谱-质谱法在选定的离子监测模式下进行了定量分析。结果表明，使用[C ₂ mim] [（MeO）（H）PO _2进行萃取与对照方法相比，IL /己烷双相体系提高了（-）-硫庚烯，雪松酚的1.2倍和2.3倍的收率。此外，在较低温度（30°C）下提取不会明显改变产量。IL可以高纯度回收，而富含纤维素的材料和木质素可以再生。这项研究表明，与常规方法相比，可以更快，更温和的条件下更有效地提取木材精油，随后利用IL分离和再生木材生物聚合物。

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Ionic Liquid-Assisted Extraction of Essential Oils from Thujopsis dolobrata (Hiba)

Aomori hiba (Thujopsis dolobrata) has been used as a building material for centuries because of the wood’s resistance against fungi and termites. In addition, the essential oil of hiba wood has a relaxing woody fragrance and antifungal properties and is composed mainly of (−)-thujopsene, cedrol, and hinokitiol. Steam distillation is the main industrial method for obtaining the oil but requires large amounts of water and heating energy. The present study describes the use of a cellulose-dissolving [C₂mim][(MeO)(H)PO₂] ionic liquid (IL) for efficient extraction of hiba oil. As a control method, organic solvent extraction using either hexane, Et₂O, or EtOAc was conducted at 80 °C for 1 h. The method developed in this study using an IL was conducted at the same temperature and time as the control method and relied on partial dissolution of the wood using the IL before partitioning the hiba oil into the organic solvent for analysis. Quantitative analysis was performed using gas chromatography–mass spectrometry in selected ion-monitoring mode. The results showed that extraction using the [C₂mim][(MeO)(H)PO₂] IL/hexane biphasic system improved the yields of (−)-thujopsene, cedrol 1.2- and 2.3-fold, when compared with the control method. Furthermore, extraction at a lower temperature (30 °C) did not significantly change the yield. The IL could be recovered with high purity, while the cellulose-rich material and lignin were regenerated. This study demonstrates the ability to effectively extract wood essential oil more quickly and under milder conditions than the conventional method, with subsequent separation and regeneration of wood biopolymers using an IL.

更新日期：2020-11-17

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