纳米纤维素
硫酸
纤维素
玉米芯
水解
酸水解
结晶度
化学
甲酸
热稳定性
木质素
牙髓(牙)
有机化学
材料科学
化学工程
原材料
复合材料
病理
工程类
医学
作者
Chao Liu,Bin Li,Haishun Du,Dong Lv,Yuedong Zhang,Guang Yu,Xindong Mu,Hui Peng
标识
DOI:10.1016/j.carbpol.2016.06.025
摘要
In this work, nanocellulose was extracted from bleached corncob residue (CCR), an underutilized lignocellulose waste from furfural industry, using four different methods (i.e. sulfuric acid hydrolysis, formic acid (FA) hydrolysis, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation, and pulp refining, respectively). The self-assembled structure, morphology, dimension, crystallinity, chemical structure and thermal stability of prepared nanocellulose were investigated. FA hydrolysis produced longer cellulose nanocrystals (CNCs) than the one obtained by sulfuric acid hydrolysis, and resulted in high crystallinity and thermal stability due to its preferential degradation of amorphous cellulose and lignin. The cellulose nanofibrils (CNFs) with fine and individualized structure could be isolated by TEMPO-mediated oxidation. In comparison with other nanocellulose products, the intensive pulp refining led to the CNFs with the longest length and the thickest diameter. This comparative study can help to provide an insight into the utilization of CCR as a potential source for nanocellulose production.
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