摘要
本文以玉米秸秆为原料,通过氢氧化钠预处理、TEMPO/NaBr/NaClO氧化体系氧化及高压均质制备纳米纤维素。利用光学显微镜、透射电镜、傅立叶红外光谱、X-射线衍射和热失重分析对玉米秸秆纳米纤维素的形态结构、化学结构、结晶性能和热稳定性进行表征和分析。结果表明,制备的玉米秸秆纳米纤维素直径大约为4~7nm,长度大约为200~500nm,结晶度为61.97%。玉米秸秆经碱预处理及TEMPO氧化后,半纤维素和木质素的脱除效果显著,而纤维素晶形没有发生变化。
In this paper,cellulose nanofibers was prepared from corn stalk by 2,2,6,6- tetramethylpiperidine- 1-oxy radical（ TEMPO）- mediated oxidation and homogenization. Samples were characterized by optical electron microscopy,TEM,FTIR,XRD and TGA. The result shows that the diameter and length of cellulose nanofibers are 4~ 7nm and 200 ~ 500 nm,respectively. And the crystallinity of TEMPO- oxidized cellulose nanofibers is 61.97%. Moreover,the hemicelluloses and lignin were removed greatly by TEMPO- mediated oxidation and the structure of cellulose wasn’t changed.
作者
谭丽
杜超
李海龙
Tan Li Du Chao Li Hai-long(State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China)
出处
《造纸科学与技术》
2016年第5期10-13,共4页
Paper Science & Technology
基金
国家自然科学基金项目(31370585)
广东省科技计划项目(2015A020215007)
中央高校基本科研业务费专项资金项目(2015ZM054)
关键词
玉米秸秆
预处理
TEMPO氧化
均质:纳米纤维素
corn stalk
pretreatment
TEMPO-mediated oxidation
homogenization
cellulose nanofibers
