林产化学与工业2017，Vol.37Issue(4)：59-66,8.DOI:10.3969/j.issn.0253-2417.2017.04.009
杨木自水解液中溶解木质素和胶体木质素的结构特征
Structural Character of Dissolved and Colloidal Lignin in Hydrolysate from Poplar Woodchips Autohydrolysis
摘要
Abstract
The dissolved and colloidal lignin(DCL)under different autohydrolysis levels were isolated and purified from the poplar woodchips autohydrolysis liquor,and their structural features were characterized by series of instrumental analysis,i.e.Fourier transform infrared(FT-IR),1H,quantitative 13C,2D HSQC,and 31P nuclear magnetic resonance(NMR)spectroscopies,and gel permeation chromatography/multi-angle laser light scattering(GPC-MALLS).The condensation of DCL in the poplar autohydrolysis liquor remarkably increased with increasing autohydrolysis temperature(Tmax>170 ℃).Comparing with functional groups of the lignin in the autohydrolyzed poplar woodchips,the DCL had less aliphatic-OH groups,containing more condensed phenolic-OH and more non-condensed phenolic-OH groups,and appearing with higher syringyl OH/guaiacyl OH ratios.These results indicated that DCL underwent more sufficient dehydration of side-chain aliphatic-OH,hydrolysis reaction of β-O-4 linkages,and condensation reaction between each lignin units.关键词
杨木/自水解/溶解木质素和胶体木质素/结构表征/木质素缩合Key words
poplar/autohydrolysis/dissolved and colloidal lignin/structure characterization/condensation of lignin分类
化学化工引用本文复制引用
王鹏,秦影,傅英娟,王兆江,张凤山..杨木自水解液中溶解木质素和胶体木质素的结构特征[J].林产化学与工业,2017,37(4):59-66,8.基金项目
国家自然科学基金资助项目(31540009 （）
31370581) （）
山东省自主创新和成果转化项目(2014CGZH0302) （2014CGZH0302）
