大连工业大学学报2017，Vol.36Issue(4)：265-270,6.
不同封端剂对玉米秸秆纤维素乙醇残渣木素碱催化解聚效果的影响
Effect of different sealing agents on the residue lignin catalytically depolymerized corn starch cellulose into ethanol
摘要
Abstract
The lignin was prepared by alkali extraction of cellulose residue from corn stover at room temperature.The effects of different capping agents such as ethanol, formaldehyde and glycerol on the distribution and capping effect of depolymerization products in lignin-catalyzed depolymerization system were studied.The results showed that the alkali-catalyzed depolymerization system of pure water system and ethanol, formaldehyde and glycerol end-capping agents had certain depolymerization effect on lignin.The selectivity of glycerol to phenolic products was better than that of ethanol and formaldehyde, and formaldehyde could reduce the composition of phenolic products.The phenolic compounds obtained by the three kinds of blocking agent system were identical isomers, of which had a certain selectivity to the end position of lignin active intermediates.The average relative molecular weight of residual lignin decreased significantly after alkali-catalyzed desorption by blocking agent, and its thermogravimetric temperature range divided to two parts as low temperature region and high temperature region, indicating that residual lignin contained weak ether-like linkage and a large number of aromatic ring C-C link keys as well.关键词
木素/碱催化解聚/封端剂/重聚Key words
lignin/alkali catalyzed depolymerization/capping agent/reunion分类
轻工纺织引用本文复制引用
蒲磊,王兴,周景辉..不同封端剂对玉米秸秆纤维素乙醇残渣木素碱催化解聚效果的影响[J].大连工业大学学报,2017,36(4):265-270,6.基金项目
国家自然科学基金项目(31470604). （31470604）
