Production of Nanocellulose Using Hydrated Deep Eutectic Solvent Combined with Ultrasonic Treatment

被引:138
作者
Ma, Yue [1 ]
Xia, Qinqin [1 ]
Liu, Yongzhuang [1 ]
Chen, Wenshuai [1 ]
Liu, Shouxin [1 ]
Wang, Qingwen [1 ]
Liu, Yixing [1 ]
Li, Jian [1 ]
Yu, Haipeng [1 ]
机构
[1] Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Harbin 150040, Heilongjiang, Peoples R China
来源
ACS OMEGA | 2019年 / 4卷 / 05期
基金
黑龙江省自然科学基金; 中国国家自然科学基金;
关键词
CELLULOSE NANOCRYSTALS; CHOLINE CHLORIDE; LIGNOCELLULOSIC BIOMASS; EFFICIENT CLEAVAGE; LIGNIN; PRETREATMENT; EXTRACTION; FACILE; NANOFIBRILLATION; WATER;
D O I
10.1021/acsomega.9b00519
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Pretreatment approaches are highly desirable to improve the commercial viability of nanocellulose production. In this study, we propose a new approach to mass produce nanocellulose using a hydrated choline chloride/oxalic acid dihydrate deep eutectic solvent (DES) combined with an ultrasonic process. The hydrogen bond acidity, polarizability, and solvation effect reflected by the Kamlet-Taft solvatochromic parameters did not decrease even after the addition of large amounts of water. Instead, the water facilitated the ionization of H+ and delocalization of Cl- ions, forming new Cl-H2O ionic hydrogen and oxalate-H2O hydrogen bonds, which are critical for improving the solvent characteristics. One pass of kraft pulp through the hydrated DESs (80 degrees C, 1 h) was sufficient to dissociate the kraft pulp into cellulose nanofibers or cellulose nanocrystals using an 800 W ultrasonic treatment. The present study represents an alternative route for the kraft pulp pretreatment and the large-scale production of nanocellulose.
引用
收藏
页码:8539 / 8547
页数:9
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