生物质化学工程2025，Vol.59Issue(6)：19-28,10.DOI:10.3969/j.issn.1673-5854.2025.06.003
烷基酚-马来酸酐络合物/微波耦合高效提取原位改性木质素及其抗氧化性能
Efficient Extraction of in situ Modified Lignin by Alkylphenol-maleic Anhydride Complex/Microwave Coupling and Its Antioxidant Properties
摘要
Abstract
In this study,alkylphenol-maleic anhydride complex was used as an efficient solvent for lignin,and lignocellulose was used as raw material,supplemented by microwave heating process to achieve efficient separation and extraction of novel in situ modified lignin.The influences of treatment temperature,treatment time,phenol species,and lignocellulose type on the yield of in situ modified lignin were investigated.Taking poplar lignocellulose as an example,the extraction rate of in situ modified lignin by o-cresol-maleic anhydride reached 93.8％and the yield was 19.8％after microwave treatment at 150 ℃ for 15 min.The hydroxyl content and chemical structure of the extracted lignin were characterized and analyzed by 31P NMR and 2D HSQC NMR spectroscopy,respectively.The results showed that the efficient dissolution of lignin by alkylphenol-maleic anhydride was accompanied by different degrees of phenolic and carboxyl modification,which prevented the repolymerization of lignin molecules.Due to the coupling of micro wave efficient heating process,the esterification grafting rate of maleic anhydride to lignin was low in a short time,resulting in lignin with higher phenolic hydroxyl content and lower carboxyl/alcohol hydroxyl content.Compared with commercial antioxidants,the novel in situ modified lignin exhibited stronger scavenging ability for DPPH·,indicating that the lignin had better antioxidant capacity.关键词
烷基酚-马来酸酐络合物/木质纤维/微波加热/木质素/结构表征Key words
alkylphenol-maleic anhydride complex/lignocellulose/microwave-heating/lignin/structural characterization分类
化学化工引用本文复制引用
周晓虹,王荣皓,孙理超,郭垂根,欧荣贤,樊奇,王清文..烷基酚-马来酸酐络合物/微波耦合高效提取原位改性木质素及其抗氧化性能[J].生物质化学工程,2025,59(6):19-28,10.基金项目
广州市重点研发计划资助项目(2024B03J1380) （2024B03J1380）
国家自然科学基金资助项目(52103110) （52103110）
