Fractional isolation and structural characterization of mild ball-milled lignin in high yield and purity from <Emphasis Type="Italic">Eucommia ulmoides</Emphasis> Oliv |
| |
| Authors: | Feng Xu Jian-Xing Jiang Run-Cang Sun Jiang-Ning Tang Jin-Xia Sun Yin-Quan Su |
| |
| Institution: | (1) College of Material Science and Technology, Beijing Forestry University, Beijing, China;(2) College of Forestry, The North-Western University of Agricultural and Forestry Sciences and Technology, Yangling, China;(3) State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China;(4) College of Material Science, Shenzhen University, Shenzhen, China |
| |
| Abstract: | Sequential extractions of the mild ball-milled Eucommia ulmoides Oliv with 80% neutral dioxane, 75% dioxane containing 0.025 M HCl, 75% dioxane containing 0.1 M NaOH, 60% ethanol containing
0.5 M NaOH, 5% KOH, 5% NaOH, and 8% KOH at 75°C for 3 h released 91.3% of the original lignin. The results showed that the
procedure for extracting lignin from the mild ball-milled wood with mild alkaline organic solvent was more efficient than
the traditional method of neutral and mild acidic dioxane extractions. The structure of the seven lignin fractions were analysed
using wet chemical analysis, such as alkaline nitrobenzene oxidation, FT-IR, and solution-state 1H, 13C, and 31P NMR techniques. It is clear that the sequential mild acidic and alkaline organic solvent extractions of the mild ball-milled
E. ulmoides Oliv offered significant yield improvements over the traditional signal acidolysis procedure for isolating lignin from wood,
and the alkaline organic solvent extraction led to more lignin release than that of the mild acidolysis. This new procedure
proposed in this study could be used for the lignin structural analysis, whereby wood is mild ball-milled and successively
extracted with both mild acidic and alkaline organic solvents as well as aqueous alkalis to produce lignin fractions with
high yield and purity and representing the total lignin in wood. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
