The effect of methylbenzene/ethanol ratios on chemical composition of extractives from Eucalyptus grandis

作     者：ZHANG Bin WU Shu-bin GUO Da-liang 

作者机构：State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhou 510640R R.China 

出 版 物：《Forestry Studies in China》 (中国林学（英文版）)

年 卷 期：2012年第14卷第3期

页      面：235-239页

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 08[工学] 083201[工学-食品科学] 0822[工学-轻工技术与工程] 

基　　金：supported by the China Postdoctoral Science Foundation(No.20100480754) National Natural Science Foundation of China(No.21176095) 

主　　题：extractives Eucalyptus grandis micro particles 

摘      要：Chemical components of methylbenzene/ethanol extractives of Eucalyptus grandis were identified by GC/MS and different methylbenzene/ethanol solutions （9/1, 4/1, 2/1, 1/1, 1/2） were used to describe their distinctions. The distributions of micro particles in each extractive were studied simultaneously. The results show that there were significant differences between the various extrac- tives, although the extractives were essentially the same, i.e., alcohols, alkanes, esters and acids. With the increase of ethanol compo- sition in the solutions, the total amount of extractives increased; in solvent with higher amounts of ethanol, some acidic structures or acids, such as glutaric acid, could be seen. An investigation of micro particles indicated that the distribution of particle size of each sample did not change greatly between the solutions. A slight decrease in size was seen with the reduction in the amount of methylbenzene.