Lignin behaviour during wood liquefaction-Characterization by quantitative 31P, 13C NMR and size-exclusion chromatography

被引：58

作者：

Jasiukaityte, Edita ^{[1
]}

Kunaver, Matja ^{[1
]}

Crestini, Claudia ^{[2
]}

机构：

[1] Natl Inst Chem, SI-1000 Ljubljana, Slovenia

[2] Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, I-00133 Rome, Italy

来源：

CATALYSIS TODAY | 2010年 / 156卷 / 1-2期

关键词：

Liquid wood; p-Toluene sulfonic acid; Size-exclusion chromatography; C-13; NMR; P-31; Lignin; QUALITATIVE-ANALYSIS; MODEL-COMPOUND; ACID; PHENOL; SPECTROSCOPY; DERIVATIVES; CHEMISTRY; MECHANISM; RESINS;

D O I：

10.1016/j.cattod.2010.02.001

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A blend of spruce (Picea spp.) and fir (Abies spp.) sawdust was liquefied by an optimized technique in the presence of multifunctional alcohols and p-toluene sulfonic acid monohydrate as a catalyst. The lignin behaviour during wood liquefaction was studied at different reaction times. Samples prepared by the new separation procedure were characterized by quantitative P-31, C-13 NMR and by size-exclusion chromatography. The final products showed increased molar masses indicating the condensation reactions between the lignin and the multifunctional alcohols. Aliphatic chains were found to be incorporated into the lignin network after liquefaction. The resulting polymer showed an increased content of aliphatic hydroxyl groups with respect to the starting material and a high degree of solubility in multifunctional alcohols. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：23 / 30

页数：8

共 34 条

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