CHEMICAL STRUCTURE CHARACTERIZATION OF LIGNIN FROM POPULUS DELTOIDES

摘要：

An enzymatic procedure was developed for the isolation of lignin from Populus nigra wood. The method was based on the hydrolysis and solubilization of wood xylan and cellulose using combination of xylanase, cellulase and glycosidase, followed by lignin purification using alkaline protease and extraction of lignin with dimethylacetamide (DMAc). The structure of Enzymatic Lignin (EL) was elucidated and compared to conventional milled wood lignin (MWL) using wet chemical analysis, quantitative 13CNMR, GC/MS and degradative techniques. The results indicate the less degradation during EL degradation compared to MWL. Comparing to conventional enzymatic extraction procedures, using a enzymatic cocktail with reduced milling time can ensure a relatively pure lignin with small structural changes. The analysis showed that P. deltoids lignin unlike to common hardwood lignins has a more guayacil lignin units.

关键词： enzymatic lignin enzymatic sequence quantitative 13C-NMR Py-GC/MS hardwood

作者: Ali Abdulkhani Ahmad Mirshokraie Alinaghi Karimi Yahya Harazeh

作者单位: Department of Wood and Paper, Faculty of Natural Resources, University of Tehran, Karadj, Iran Department of Chemistry, Payame Noor University, Tehran, Iran Institute of Tropical Forestry and Forest Products (INTROP), University Putra Malaysia, 43400 UPM Se

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 242-246

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）