An innovative binary biol-based deep eutectic solvent (DES), specifically ethylamine hydrochloride-ethylene glycol (EaCl-EG), was developed for efficient pretreatment of eucalyptus biomass. This DES exhibited superior performance in achieving high delignification (85.0%) and xylan removal (80.0%), while preserving a significant amount of cellulose (94.5%) compared to choline chloride-based DES. Notably, the pretreated eucalyptus residues showed a remarkable glucose yield of over 92.5%, representing a substantial enhancement of up to 15 times compared to untreated eucalyptus. Furthermore, the pretreated liquor yielded high-purity lignin with a yield of 97.8%, characterized by well-preserved β-O-4 structure and nanoscale dimensions. These lignin nanoparticles (LNPs) were subsequently self-assembled into lignin nanobottles (LNBs), adding further value to the pretreatment process. The proposed novel binary EaCl-EG DES presented great potential as an efficient pretreatment solvent for future biomass fractionation processes.

中文翻译：

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用于增强桉树酶糖化和木质素分馏的高效二元二醇基低共熔溶剂预处理


开发了一种创新的基于二元生物醇的低共熔溶剂 (DES)，特别是盐酸乙胺-乙二醇 (EaCl-EG)，用于有效预处理桉树生物质。与基于氯化胆碱的 DES 相比，该 DES 在实现高脱木质素 (85.0%) 和木聚糖去除 (80.0%) 方面表现出优异的性能，同时保留了大量的纤维素 (94.5%)。值得注意的是，经过预处理的桉树残渣显示出超过 92.5% 的显着葡萄糖产率，与未经处理的桉树相比，大幅提高了 15 倍。此外，预处理液产生了高纯度木质素，收率为97.8%，其特征在于保存完好的β-O-4结构和纳米级尺寸。这些木质素纳米颗粒（LNP）随后自组装成木质素纳米瓶（LNB），为预处理过程增加了更多价值。所提出的新型二元 EaCl-EG DES 作为未来生物质分馏过程的有效预处理溶剂具有巨大的潜力。