Effects of Hydrothermal Pretreatment on the Structural Characteristics of Organosolv Lignin from Triarrhena lutarioriparia

被引：17

作者：

Chen, Tianying ^{[1
]}

Li, Zhiwen ^{[1
]}

Zhang, Xueming ^{[1
]}

Min, Douyong ^{[2
]}

Wu, Yuying ^{[1
]}

Wen, Jialong ^{[1
]}

Yuan, Tongqi ^{[1
]}

机构：

[1] Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China

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

来源：

POLYMERS | 2018年 / 10卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Triarrhena lutarioriparia; quantitative heteronuclear-single-quantum-coherence spectra (HSQC); hydrothermal pretreatment; organosolv; lignin; EUCALYPTUS-GLOBULUS WOOD; ENZYMATIC-HYDROLYSIS; LIGNOCELLULOSIC BIOMASS; INTEGRATED PROCESS; ACID-PRETREATMENT; ACETYLATED LIGNIN; WATER RESISTANCE; KRAFT LIGNIN; HOT-WATER; AUTOHYDROLYSIS;

D O I：

10.3390/polym10101157

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effects of hydrothermal pretreatment (170-180 degrees C, 30-60 min) on the structural characteristics of enzymatic and extracted lignin from Triarrhena lutarioriparia (TL) during the integrated delignification process have been comprehensively investigated. Ion chromatography and NMR characterization showed that liquid products after mild hydrothermal process (170 degrees C, 30 min) were mainly composed of xylooligosaccharide (XOS) with different degrees of polymerization (DP >= 2). In addition, the structural changes of lignin during hydrothermal pretreatment and organic acid delignification process have been demonstrated by quantitative 2D heteronuclear single quantum coherence (2D-HSQC) and P-31-NMR techniques. Results showed that the structural changes of lignin (e.g., cleavage of beta-O-4 linkages) induced by the hydrothermal pretreatment will facilitate the subsequent organic acid delignification process, and acetylated lignin could be obtained with a considerable yield, which can be used in lignin-based composite and candidate feedstock for catalytic upgrading of lignin. In short, the proposed process facilitates the producing of XOS and acetylated lignin for lignin valorization.

引用

页数：14

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