A synergistic hydrothermal-deep eutectic solvents (DES) pretreatment for acquiring xylooligosaccharides and lignin nanoparticles from Eucommia ulmoides wood.
A synergistic hydrothermal-deep eutectic solvents (DES) pretreatment for acquiring xylooligosaccharides and lignin nanoparticles from Eucommia ulmoides wood.
复制标题
DOI：
10.1016/j.ijbiomac.2022.04.008
复制
发表时间：
2022-04
影响因子：
8.2
通讯作者：
Weilun Gong;Chen Zhang;Jian He;Yuan Gao;Youzhi Li;Ming Zhu;J. Wen
中科院分区：
文献类型：
--
作者：
Weilun Gong;Chen Zhang;Jian He;Yuan Gao;Youzhi Li;Ming Zhu;J. Wen
为实现杜仲低聚木糖（XOS）和木质素纳米颗粒（LNPs）制备过程中的有效解构，开发了一种协同预处理方法。在本文中，半纤维素在乙酸催化的水热预处理（HTP）中优先解离以制备XOS，然后对水热预处理的基材进行深共熔溶剂（DES）脱木质素以制造LNP。结果表明，在170 °C，0.5h的热处理条件下，XOS的产率最高，为33.88%（以木聚糖计）。NMR表征表明，木质素的键主要由β-O-4、β-β、β-5等键组成; GPC分析表明，DES木质素级分的分子量（1130-1200 g/mol）低于相应的母体木质素级分的分子量（8500-9620 g/mol）。进一步的TEM表征表明，最佳LNPs级分具有窄的粒径分布，相应的粒径范围为60至110 nm。总之，协同预处理可以作为一种绿色和经济有效的方法用于从杜仲生物质中开发生物基化学品和生物材料。
To achieve an effective deconstruction for preparation of xylooligosaccharides (XOS) and lignin nanoparticles (LNPs) fromEucommia ulmoides, a synergistic pretreatment was successfully developed. Herein, the hemicelluloses were preferentially dissociated in acetic acid-catalyzed hydrothermal pretreatment (HTP) for preparation 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 °C, 0.5 h). NMR characterization showed that the linkages of lignin were mainly composed of β-O-4, β-β, β-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 fromEucommia ulmoidesbiomass.