可再生能源2025，Vol.43Issue(7)：853-860,8.
固体酸催化离子液体预处理芦竹过程中假木素的形成及结构研究
The formation and structure characterization of pseudo-lignin in Arundo donax Linn.during solid acid catalyzed ionic liquids pretreatment
摘要
Abstract
This study employed solid acid catalyzed ionic liquid pretreatment for Arundo donax Linn.holocellulose and the formation process of pseudo-lignin was investigated through chemical composition analysis.The formed pseudo-lignin was further isolated by enzymatic hydrolysis and characterized using an array of physicochemical methods.The results demonstrated that:the hemicellulose content in raw material decreased,whereas the intensity of carbonyl absorption peaks and the pseudo-lignin content increased with increasing pretreatment intensity.These suggested that pseudo-lignin formation is primarily resulted from hemicellulose degradation and pseudo-lignin may contain some carbonyl groups.The pseudo-lignin formed during the solid acid catalyzed ionic liquid pretreatment of Arundo donax Linn.presented a microspherical morphology and the particle size distribution and surface morphology of these microspheres were found to be dependent on the pretreatment intensity.Unlike dilute acid pretreatment,pseudo-lignin microspheres formed under high intensity exhibited smaller sizes and rougher surface with concomitant pores.84.6%of pseudo-lignin was obtained by enzymatic hydrolysis method.Gel Permeation Chromatography(GPC),Fourier Transform Infrared(FTIR)spectroscopy,and 1H Nuclear Magnetic Resonance(1H NMR)spectroscopy analysis revealed that the weight-average molecular weight,number-average molecular weight,and polydispersity index of isolated pseudo-lignin was 1550 g/mol,1340 g/mol,and 1.16,respectively,and the pseudo-lignin contained some aromatic rings,carboxyl groups,hydroxyl groups,and carbonyl moieties.关键词
固体酸催化离子液体预处理/假木素/形成过程/化学结构Key words
solid acid catalyzed ionic liquids pretreatment/pseudo-lignin/formation/chemical structure分类
能源科技引用本文复制引用
韦江龙,马克,裴昕斐然,游婷婷,许凤..固体酸催化离子液体预处理芦竹过程中假木素的形成及结构研究[J].可再生能源,2025,43(7):853-860,8.基金项目
国家自然科学基金项目(22008010) （22008010）
国家"十三五"重点研发计划子课题(2021YFC2101301) （2021YFC2101301）
北京林业大学"5·5工程"科研创新团队项目(BLRC2023B01). （BLRC2023B01）
