摘要
利用低共熔溶剂(DES)对植物纤维木质素进行分离提取,可以克服传统植物纤维预处理过程中存在的处理效率低、溶剂损失大和木质素降解严重等技术难题。为提高木质素提取率,选用的DES一般具有较强的极性,在处理植物纤维后,其与碳水化合物组分不易分离,而且DES回收较为困难。针对上述问题,基于DES体系的作用机理和溶剂特性,研究构建了开关型DES,可在提取木质素时强化DES的极性,提高木质素提取率;在回收DES过程中将其转化为非极性,提高DES的回收率。构建低成本、高效率、可持续提取木质素的开关型DES预处理方法,可进一步丰富植物纤维预处理技术理论体系。
Deep eutectic solvent(DES)pretreatment overcomes the defects of low efficiency,great solvent loss,and severe lignin decomposition that exits in the traditional pretreatment methods for plant fiber lignin extraction.DES with strong polarity is commonly used to improve the lignin extraction efficiency.However,poor recyclability is commonly induced,due to their affinity to the hydrocarbon components.Aiming at the above problems and based on the mechanism of action and solvent properties,a novel switchable DES system with switchable polarity is proposed,which could enhance polarity during the lignin extraction process to improve the extraction efficiency,and switch to nonpolar solvent during the recycling process to improve the recyclability of DES.The switchable DES could provide a low-cost,high-efficiency,and sustainable method for lignin extraction,facilitating the development of plant fiber pretreatment technology.
作者
齐乐天
李德宝
杨桂花
薛玉
陈嘉川
QI Letian;LI Debao;YANG Guihua;XUE Yu;CHEN Jiachuan(State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp&Paper Science and Technology of Education Ministry of China,Qilu University of Technology(Shandong Academy of Sciences),Ji'nan,Shandong Province,250353)
出处
《中国造纸学报》
CAS
CSCD
北大核心
2022年第4期111-120,共10页
Transactions of China Pulp and Paper
基金
国家自然科学基金项目(22108134)
山东省重点研发计划(2021CXGC010601,2019JZZY010326,2019JZZY010328)
山东省科教产融合创新试点工程(2022JBZ01-05,2022PY042)
泰山学者工程。
关键词
低共熔溶剂
木质素
预处理
选择性分离
deep eutectic solvent
lignin
pretreatment
selective extraction
