Dissolution behaviour and the solution property of cellulose in NaOH/Urea/Thiourea Aqueous Solvent

被引：0
|
作者：
Li, Huan [1 ]
Li, Haifeng [1 ]
Zhong, Xuan
Gibril, Magdi E.
Li, Xinda
Zhang, Yue
Han, Keqing
Yu, Muhuo [1 ]
机构：
[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China
来源：
FRONTIERS OF MATERIALS, CHEMICAL AND METALLURGICAL TECHNOLOGIES, PTS 1 AND 2 | 2012年 / 581-582卷
关键词：
Cellulose swelling and dissolving; rheological properties; crystallinity; gel; SOLUBILITY;
D O I：
10.4028/www.scientific.net/AMR.581-582.73
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Untreated cellulose was directly and quickly dissolved in NaOH/thiourea/urea aqueous solvent at a 9/3/5/83 composition and pre-cooled at (-10 to +2)degrees C, and at a high shear force with 3500rpm agitating speed. The dissolving process was investigated by polarization microscope, XRD and rheometer. The result revealed that cellulose crystal forms was changed from cellulose I to cellulose II after dissolving and the crystallinity decreased. Moreover, the gel forming of cellulose has an obvious relationship with cellulose concentration and it's easy to form gel when the cellulose concentration was above 8wt%.
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页码：73 / +
页数：2
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