中国造纸2023，Vol.42Issue(11)：68-77,10.DOI:10.11980/j.issn.0254-508X.2023.11.009
毛竹半纤维素的提取及其羧甲基化改性研究
Extraction and Carboxymethylation of Hemicelluloses from Moso Bamboo
摘要
Abstract
In this study,the hemicelluloses were separated from moso bamboo via alkaline hydrogen peroxide method,and then modified by carboxymethylation with ultrasonic assistance.The results showed that the highest hemicelluloses yield of 18.00％was achieved at a liquid to solid ratio of 20:1.The optimum preparation process was proved as follows:the concentration of NaOH was 1.2 mol/L,the concentra-tion of chloroacetic acid was 0.6 mol/L,the alkalization time and temperature were 40 min and 30 ℃,respectively,the etherification time and temperature were 150 min and 70 ℃,respectively.With the increase of carboxymethyl hemicellulose substitution degree,the maximum degradation temperature of hemicellulose before and after modification increased from 257 ℃ to 300 ℃,indicating that carboxymethyl modi-fication could improve the thermal stability of hemicelluloses.Moreover,the absolute value of Zeta potential increased from 9.98 mV to 38.00 mV(substitution degree=0.59),and the dispersibility of carboxymethyl hemicelluloses was significantly improved.关键词
毛竹/半纤维素/羧甲基半纤维素/改性Key words
moso bamboo/hemicellulose/carboxymethyl hemicellulose/modification分类
轻工纺织引用本文复制引用
白雪纯,陈天影,李勉,杨武龙,徐伟冬,郑晓阳,张为宏,唐艳军..毛竹半纤维素的提取及其羧甲基化改性研究[J].中国造纸,2023,42(11):68-77,10.基金项目
国家自然科学基金青年项目(22208309) （22208309）
浙江省自然科学基金(LQ21C160006) （LQ21C160006）
浙江省重点研发计划(2020C02021) （2020C02021）
衢州市科技计划项目(2022Z07). （2022Z07）
