Study on Lignin-Glyoxal Reaction by MALDI-TOF and CP-MAS 13C-NMR

被引：45
作者：
Navarrete, P. [1 ]
Pizzi, A. [1 ]
Pasch, H. [2 ]
Delmotte, L. [3 ]
机构：
[1] Univ Nancy 1, ENSTIB LERMAB, F-88051 Epinal, France
[2] Univ Stellenbosch, Polymer Res Inst, ZA-7600 Stellenbosch, South Africa
[3] Univ Haute Alsace, LRC CNRS 7228, Inst Sci Mat Mulhouse IS2M, Mulhouse, France
来源：
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY | 2012年 / 26卷 / 8-9期
关键词：
Lignin; glyoxalation; adhesives; MALDI; lignin-glyoxal reaction; oligomer species; oligomers distribution; LASER-DESORPTION IONIZATION; EXTERIOR WOOD ADHESIVES; SYNTHETIC-POLYMERS; PANEL ADHESIVES; SPECTROMETRY; RESINS; FORMALDEHYDE; ELUCIDATION; PRODUCTS; TANNIN;
D O I：
10.1163/016942410X550030
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Matrix-Assisted Laser Desorption/Ionization Time-of-Flight (MALDI-TOF) mass spectrometry was used to elucidate lignin-glyoxal reactions. The reaction of glyoxal with a low molecular weight lignin involves a number of different reactions; in particular lignin depolymerization and recombination through condensation reactions with glyoxal to form glyoxalene bridges linking both lignin units and mainly fractions of lignin units derived from degradation during depolymerization. The reactive hydroxyglyoxalated lignin is the one species still available for co-reaction for use in wood adhesives. The reactions described increase the viscosity of the lignin as the reaction proceeds towards higher molecular mass species and the condensed species grow in relative proportions. NMR analysis confirmed the existence of functional groups pertaining to structures that are formed from glyoxalation of the lignin observed by some results obtained by MALDI-TOF. MALDI-TOF mass spectrometry appears to be a suitable method for examining lignin-glyoxal reactions. (C) Koninklijke Brill NV, Leiden, 2012
引用
收藏
页码：1069 / 1082
页数：14
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