Ionic liquids as media for biomass processing: opportunities and restrictions

被引：27

作者：

Schrems, Michael ^{[1
]}

Brandt, Agnieszka ^{[2
]}

Welton, Tom ^{[2
]}

Liebner, Falk ^{[1
]}

Rosenau, Thomas ^{[1
]}

Potthast, Antje ^{[1
]}

机构：

[1] Univ Nat Resources & Life Sci, Christian Doppler Lab Adv Cellulose Chem & Analyt, Dept Chem, A-1190 Vienna, Austria

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

来源：

HOLZFORSCHUNG | 2011年 / 65卷 / 04期

关键词：

cellulose; cellulose degradation; Curie-point pyrolysis gas chromatography/mass spectrometry (Cu-Py-GC/MS); fractionation; ionic liquids (ILs); lignin; molecular weight distribution (MWD); renewable materials; size-exclusion chromatography (SEC); LIGNOCELLULOSIC MATERIALS; CELLULOSE; DISSOLUTION; WOOD; BEHAVIOR; SOLVENT;

D O I：

10.1515/HF.2011.099

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The present study provides insight into the dissolution behavior of renewable materials in ionic liquids. Beech, spruce and rye straw were dissolved in 1-ethyl-3-methylimidazolium acetate as the ionic liquid of choice, which is currently one of the most frequently used cation-anion combinations among ionic liquids for biomaterial processing. The dissolution was followed by selective precipitation of cellulose, hemicelluloses, and lignin. The obtained lignin was analyzed with Curie-point pyrolysis gas chromatography/mass spectrometry (Cu-Py-GC/MS) and the separated cellulose/hemicellulose fractions with gel permeation chromatography (GPC). Time dependence of the dissolution process was studied on rye straw, eucalyptus kraft pulp and beech sulfite pulp. The results show a changing dissolution profile over time, which is due to progressing degradation of the cellulose in the ionic liquid.

引用

页码：527 / 533

页数：7

共 28 条

[21] Ionic liquid as a green solvent for lignin [J].