用于小麦秸秆分馏和全组分利用的木质素溶解度更高的生物基深共晶溶剂

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2024-11-17 DOI:10.1016/j.indcrop.2024.120054

Huan Wang , Jiasheng Chen , Zhengfei Pei , Zhen Fang , Song Yang , Hu Li

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引用次数: 0

摘要

在木质纤维素预处理过程中，如何在高效分馏与木质素结构完整性之间取得平衡仍是一项挑战。本研究开发了一种选择性木质素溶解/萃取/稳定的创新策略，利用由二甲基异山梨醇/乙二醇/草酸组成的生物基三元深度共晶溶剂，从小麦秸秆中高效分馏出优质碳水化合物，并很好地保留了木质素。在 37 分钟内，预处理效率（90.7%）、木质素脱除率（92.2%）和纤维素回收率（88.4%）均达到超高水平。此外，还获得了极佳的酶消化率（91.9%）、无抑制剂碳水化合物水解物到微生物脂质的转化率（8.3 克/100.0 克小麦秸秆）以及具有良好紫外线阻隔性能的木质素。通过汉森溶解度理论阐明了木质素脱胶的机理，发现较低的相对能量差、较强的氢键内聚力和乙二醇的加入使得糖平台得到了有效利用，而不会影响木质素结构的完整性。这种以木质素增溶为导向的策略是对木质纤维素绿色高效预处理方法的补充，这种方法以整体价值化为目标，有助于实现闭环生物炼制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Bio-based deep eutectic solvent of enhanced lignin solubility for wheat straw fractionation and full-component utilization$

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Bio-based deep eutectic solvent of enhanced lignin solubility for wheat straw fractionation and full-component utilization

Balancing efficient fractionation with the structural intactness of lignin in lignocellulose pretreatment remains challenging. An innovative strategy with selective lignin solubilization/extraction/stabilization was developed to efficiently fractionate high-quality carbohydrates and well-preserve lignin from wheat straw employing a bio-based ternary deep eutectic solvent comprising dimethyl isosorbide/ethylene glycol/oxalic acid. Ultrahigh pretreatment efficiency (90.7 %), delignification rate (92.2 %), and cellulose recovery (88.4 %) were demonstrated in 37 min. Furthermore, excellent enzymatic digestibility (91.9 %), conversion of inhibitor-free carbohydrate hydrolysates to microbial lipid (8.3 g/100.0 g wheat straw), and lignin with good UV-blocking performance were obtained. The mechanistic insights into delignification were elucidated through Hansen solubility theory, revealing that the lower relative energy difference, strong hydrogen bonding cohesion, and ethylene glycol incorporation enabled efficient utilization of the sugar platform without compromising the structural intactness of lignin. This lignin solubilization-oriented strategy complements green and efficient pretreatment methods for lignocellulose that target holistic valorization and contribute to closed-loop biorefineries.

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.