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

打开文本图片集

关键词：甲酸；类木质素母体小分子；纤维素甲酸酯；漂白中图分类号：TS721 文献标识码：A DOI： 10.11980/j.issn.0254-508X.2025.10.005

Effects ofLignin ParentSmallMolecules on CelluloseEsterificationand Pulp BleachabilityinFormicAcidSystems

ZHANG Hongyu12NIShuzhen1.2*ZHANG Yongchao1.2*CHEN Xiaoqian1，2²WANG Zhaojiang1，2²QIN Menghua²* （1.State KeyLabofGrenPapermakingandResourceRecycling，Qilu UniversityofTechnology（ShandongAcademyofSciences）， Ji'nan，Shandong Province，5O353；2.ShoolofChemistryandChemicalEngineering，QiluNormal University，Jinan， Shandong Province，） （ * E-mail：nishuzhen@qlu.edu.cn； yongchaoaaa@163.com；qmh@qlu. edu.cn）

Abstract：Inthisstudytheoingsystemompoedoflgnin-likeparentsalloleulesndfoicacidasusedtoexplortetf cookingreactionocellosestutureAttheet，emicoystaliecelloesiulationmicoexperintsusdtaacte izethecelloeuctufecoing.eotetofclloeterodinfoiccidsstsexpd，teposiofefion 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% undera single formic acid system，in the cooking system with different types of lignin parentsmalmoleulesndficcidAccodg tnalysis，asspeculatedtatcelloeesterificationocurrdinC，dC6 bonds.Afterconducting bleachingonthecooked pulp，itwasdiscovered thatcomparedwiththeunbleached pulp，afteradding 6% NaOH and 2% （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. Atthesametime，itwasfundtatthepulpobtaiedbyddinglignin-likeparentsmallmoleculeshdarelativelysmallcontactanglecomparedwiththepulpbtaindbysinglefomcacidcooking，ndicatingtatsingleforicacidcookingwouldgeneratemoresterbondsonthe cellulose surface.

Keywords：formic acid;lignin parent small molecules;cellulose formate；bleaching

随着化石燃料使用的日益加剧，能源危机愈发严峻，人们对使用可持续、可再生的清洁能源替代化石能源的研究愈发强烈。（剩余12420字）