Novel supramolecular deep eutectic solvent-enabled in-situ lignin protection for full valorization of all components of wheat straw
文献类型： 外文期刊
作者： Tan, Jinyu 1 ; Huang, Jinshu 1 ; Yuan, Junfa 1 ; Chen, Jiasheng 1 ; Pei, Zhengfei 1 ; Li, Hu 1 ; Yang, Song 1 ;
作者机构： 1.Guizhou Univ, Natl Key Lab Green Pesticide, Key Lab Green Pesticide & Agr Bioengn, Ctr R&D Fine Chem,Minist Educ,State Local Joint La, Guiyang 550025, Guizhou, Peoples R China
2.Guizhou Acad Agr Sci, Inst Crop Germplasm Resources, Guiyang, Peoples R China
关键词： Supramolecular pretreatment; Lignin removal; Lignin condensation
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）
ISSN： 0960-8524
年卷期： 2023 年 388 卷
页码：
收录情况： SCI
摘要： Lignin is usually deemed as an inhibitor to enzymatic hydrolysis of cellulose due to its physical barrier, nonproductive adsorption, and steric hindrance. Herein, a novel supramolecular deep eutectic solvent (SUPRADES), comprising ethylene glycol and citric acid in 5:1 M ratio, and beta-cyclodextrin (beta-CD) in a concentration of 3.5% (w/w), was developed to be efficient for pretreating wheat straw. The delignification rate, cellulose enzymatic digestibility, and hemicellulose removal reached 90.45%, 97.36% and 87.24%, respectively, which may be attributed to the introduction of beta-CD with superior ability of both adsorption and in-situ lignin protection to efficiently remove lignin with intact structure from cellulose surface. The mechanisms of high-efficiency lignin extraction/protection were systematically illustrated by adsorption kinetics. Moreover, Trichosporon cutaneum grown on the hemicellulose and cellulose fractions after pretreatment afforded 8.8 g total lipids from 100 g wheat straw. The green SUPARDES pretreatment strategy offers a new avenue for upgrading lignocellulose to biofuels.
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