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通过g-valerolactone (GVL) 与酸化溶盐系统协调,破解氨酸乙烯结合物

Tianyuan Xiao¹, Jiahui Song², Wenchao Jia²

¹The Key Laboratory of High Value Utilization of Botanical Resources of China Light Industry, Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning, 116034, China; College of Light Industry and Textile, Qiqihar University, Qiqihar, Heilongjiang 161000, China.

International journal of biological macromolecules

|April 5, 2025

概括

本研究详细介绍了一种使用LiBr·3H2O/HBr-γ-valerolactone系统的可持续法来去聚合红素. 在优化条件下,可以获得具有变化的分子量和增加基含量的有价值的素衍生物.

科学领域:

绿色化学绿色化学
生物质的价值化生物质的价值化
聚合物科学聚合物科学

背景情况:

素脱聚合是生物燃料和材料等可持续应用的关键.
能有效地切割红素中的化学键,对于其有效利用至关重要.
工业性素为化学转化提供了可持续的原料.

研究的目的:

通过使用一种新的LiBr·3H2O/HBr-γ-valerolactone (GVL) 系统,研究工业性木质素的脱聚合.
为了优化反应条件,以实现高效的素键裂变和衍生物形成.
描述由此产生的脱聚合的宁产品,并评估该过程的可持续性.

主要方法:

系统地研究LiBr·3H2O/HBr-GVL中的素脱聚合.
反应参数的优化,包括温度,时间和反应剂比率 (HBr/,GVL/).
使用富里埃变换红外光谱 (FTIR),核磁共振 (NMR),扫描电子显微镜 (SEM) 和动态光散射 (DLS) 进行脱聚合的素的表征.

主要成果:

在优化的条件下 (110°C,90分钟,特定的HBr/GVL比率) 产生了素衍生物,M_w为1889g/mol,M_n为895g/mol.
希伯特基末群的形成得到证实;芳香环结构保持不变.
氧含量从1.91 mmol/g增加到2.96 mmol/g;观察到球形粒子形态.

结论:

Br·3H2O/HBr-GVL系统是一种有效和可持续的素脱聚合途径.
GVL增强了木质素-无机盐的结合,促进了酸催化乙烯的结合裂变.
该过程产生了可贵的脱聚合的宁衍生物,适合各种应用.

关键词:

脱聚合脱聚合方式在Lignin的基础上.化盐水合物化盐水合物量化计算量化计算方法

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