Organic Solvent Isolation and Structural Characterization of Willow Lignin

被引：5

作者：

Wu, Yinglong ^{[1
]}

Saeed, Haroon A. M. ^{[1
,2
]}

Li, Tengfei ^{[1
]}

Lyu, Gaojin ^{[1
,3
]}

Wang, Zhiwei ^{[3
]}

Liu, Yu ^{[1
]}

Yang, Guihua ^{[1
]}

Lucia, Lucian A. ^{[1
,4
]}

机构：

[1] Qilu Univ Technol, Shandong Acad Sci, State Key Lab Biobased Mat & Green Papermaking, Jinan 250353, Shandong, Peoples R China

[2] Univ Gezira, Fac Ind Engn & Technol, Ctr Fibers Papers & Recycling, Box 20, Wad Madani 79371, Sudan

[3] Guangxi Univ, Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Guangxi, Peoples R China

[4] North Carolina State Univ, Dept Forest Biomat, Box 8005, Raleigh, NC 27695 USA

来源：

BIORESOURCES | 2018年 / 13卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Lignin; Characterization; Willow; Isopropanol; P-31-NMR; PYROLYSIS BEHAVIOR; BIOMASS; SHELL; WATER;

D O I：

10.15376/biores.13.4.7957-7968

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Autocatalyzed isopropanol-water extraction is a potentially high-value lignin isolation methodology. A solution of isopropanol-water (2-PrOH/H2O, 7:3, v/v) was used on willow powder (Salix matsudana cv. Zhuliu), at varying temperatures (160 degrees C to 210 degrees C) and reaction times (6 h to 12 h). The highest yield (61 wt%) and purity (93.7%) with low weight/number average molecular weight (1681/1061 g/mol) was observed at a treatment temperature and time of 190 degrees C and 10 h, respectively. Fourier-transform infrared (FTIR) and two-dimensional nuclear magnetic resonance (2D-NMR) spectroscopy indicated that the lignin was composed of syringyl (S) and guaiacyl (G) units that were not severely damaged. More specifically, P-31-NMR showed that S units were dominant. Finally, a majority of glucan was preserved.

引用

页码：7957 / 7968

页数：12

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