A synergistic hydrothermal-deep eutectic solvents (DES) pretreatment for acquiring xylooligosaccharides and lignin nanoparticles from Eucommia ulmoides wood

被引：22

作者：

Gong, Wei-Hua ^{[1
]}

Zhang, Chen ^{[2
]}

He, Jian-Wu ^{[1
]}

Gao, Yuan-Yuan ^{[3
]}

Li, You-Ji ^{[1
]}

Zhu, Ming-Qiang ^{[4
]}

Wen, Jia-Long ^{[2
]}

机构：

[1] Jishou Univ, Natl & Local United Engn Lab Integrat Utilizat Te, Jishou 416000, Peoples R China

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

[3] Tianjin Univ Sci & Technol, Coll Biotechnol, Key Lab Ind Fermentat Microbiol, Tianjin 300457, Peoples R China

[4] Northwest A&F Univ, Coll Mech & Elect Engn, Yangling 712100, Shaanxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2022年 / 209卷

基金：

中国国家自然科学基金;

关键词：

Hydrothermal pretreatment; Deep eutectic solvents; Lignin nanoparticles; Eucommia ulmoides Oliver wood; XOS; Lignin; STRUCTURAL-CHANGES; EXTRACTION; OLIVER;

D O I：

10.1016/j.ijbiomac.2022.04.008

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

To achieve an effective deconstruction for preparation of xylooligosaccharides (XOS) and lignin nanoparticles (LNPs) from Eucommia ulmoides, a synergistic pretreatment was successfully developed. Herein, the hemi-celluloses were preferentially dissociated in acetic acid-catalyzed hydrothermal pretreatment (HTP) for prepa-ration of XOS, and the hydrothermally-pretreated substrate was then subjected to deep eutectic solvents (DES) delignification for fabrication of LNPs. Results showed that the optimal yield (33.88% based on xylan) of XOS is obtained under the given HTP condition (170 ?, 0.5 h). NMR characterization showed that the linkages of lignin were mainly composed of beta-O-4, beta-beta, beta-5, etc. Besides, GPC analysis showed that the molecular weight of DES lignin fractions was lower (1130-1200 g/mol) than those of corresponding parent lignin fractions (8500-9620 g/ mol). Further TEM characterization indicated that the optimal LNPs fraction has a narrow size distribution and the corresponding size is ranged from 60 to 110 nm. In short, the synergistic pretreatment could be used as a green and cost-effective approach for the development of bio-based chemicals and biomaterials from Eucommia ulmoides biomass.

引用

页码：188 / 197

页数：10