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分别应用苯醇、水及醇水三种抽提溶剂对尾巨桉木片进行抽提,制得三种不同的抽提物。通过元素分析、溶出物微粒子粒径分析对其进行了基本溶出规律的研究;设计TG与Py-GC/MS实验,对不同方式获得的抽出物进行了热分析,对其受热分解特性以及产物的分布进行了考查。结果发现,不同抽提物的化学元素含量存在明显的差异;其中碳元素含量大小顺序为,苯醇抽提物(benzene-ethanol extractive,BEE)>醇水抽提物(ethanol-water extractive,EWE)>水抽提物(water extractive,WE),氧元素含量相反,其原因是由于不同抽提物所含的化合物种类存在较大差别。不同抽提物溶液之间的微粒子直径也存在较大的差异,粒径分析表明WE具有更大的粒径分布跨度并且大尺寸微粒子含量最高,而BEE与之相反。对于抽提物的热分析表明,不同抽提物所表现出的热解特性也存在较大差异,同样是抽提物所含化合物种类差异所致;WE的热解产物主要是酮类、酚类和脂类,BEE的热解产物主要是呋喃类、醇类、环烷烃、酮类及酚类。EWE的热解产物主要是呋喃、糠醛、酚类和脂类。
Three extraction solvents, namely, benzene, alcohol and water respectively, were used to extract three kinds of extractives. Through the elemental analysis and the analysis of the particle size of the educts, the basic dissolution rules were studied. The TG and Py-GC / MS experiments were designed. The extracted materials obtained from different ways were analyzed by thermal analysis. The thermal decomposition characteristics, Distribution was examined. The results showed that there were obvious differences in the chemical elements contents of different extracts. Among them, the content of carbon was in the order of benzene-ethanol extractive (BEE)> ethanol-water extractive (EWE )> Water extractive (WE), the oxygen content of the opposite, the reason is due to the different compounds contained in different types of extracts there is a big difference. There is also a large difference in particle diameter between different extract solutions. The particle size analysis shows that WE has a larger particle size distribution span and the largest particle size is the highest, while BEE is the opposite. The thermal analysis of the extracts showed that the pyrolysis characteristics exhibited by different extracts also differed greatly, which was also caused by the differences in the types of compounds contained in the extracts. The pyrolysis products of WE were mainly ketones, phenols Fibers and lipids, BEE pyrolysis products are mainly furans, alcohols, naphthenes, ketones and phenols. The pyrolysis products of EWE are mainly furan, furfural, phenols and lipids.