中国造纸2025，Vol.44Issue(10)：41-49,9.DOI:10.11980/j.issn.0254-508X.2025.10.005
类木质素母体小分子对甲酸体系下纤维素酯化反应及纸浆可漂性的影响
Effects of Lignin Parent Small Molecules on Cellulose Esterification and Pulp Bleachability in Formic Acid Systems
摘要
Abstract
In this study,the cooking system composed of lignin-like parent small molecules and formic acid was used to explore the effect of cooking reaction on cellulose structure.At the same time,the microcrystalline cellulose simulation micro-experiment was used to character-ize the cellulose structure after cooking.The content of cellulose ester bond in formic acid system was explored,the position of esterification reaction was speculated,and the relationship between pulp whiteness and pH of bleaching system was constructed.The results showed that the esterification rate of cellulose was about 7.01%under a single formic acid system,in the cooking system with different types of lignin par-ent small molecules and formic acid.According to NMR analysis,it was speculated that cellulose esterification occurred in C2,C3 and C6 bonds.After conducting bleaching on the cooked pulp,it was discovered that compared with the unbleached pulp,after adding 6%NaOH and 2%H2O2,the brightness of the pulp increased from 71.3%to 81.4%,and the tensile index decreased from 31.5 N·m/g to 26.9 N·m/g.At the same time,it was found that the pulp obtained by adding lignin-like parent small molecules had a relatively small contact angle com-pared with the pulp obtained by single formic acid cooking,indicating that single formic acid cooking would generate more ester bonds on the cellulose surface.关键词
甲酸/类木质素母体小分子/纤维素甲酸酯/漂白Key words
formic acid/lignin parent small molecules/cellulose formate/bleaching分类
轻工纺织引用本文复制引用
张宏宇,倪书振,张永超,陈晓倩,王兆江,秦梦华..类木质素母体小分子对甲酸体系下纤维素酯化反应及纸浆可漂性的影响[J].中国造纸,2025,44(10):41-49,9.基金项目
国家自然科学基金青年科学基金项目(02056294,32271821) （02056294,32271821）
全国重点实验室建设重大科研专项(2025ZDGZ02) （2025ZDGZ02）
济南高校二十条创新团队项目(202228076). （202228076）
