Solubility of cellulose in ZnCl2 aqueous solution and structure of regenerated cellulose

被引：0
|
作者：
Xiong J. [1 ]
Ye J. [1 ,2 ]
Zhao X.-F. [2 ]
机构：
[1] School of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong
[2] State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2010年 / 38卷 / 02期
关键词：
Cellulose; Degree of polymerization; Dissolution; Hydrogen bond; Regenerated cellulose; Zinc chloride aqueous solution;
D O I：
10.3969/j.issn.1000-565X.2010.02.005
中图分类号：
学科分类号：
摘要：
The paper deals with the dissolving ability of ZnCl2 aqueous solutions with various mass fractions for cellulose with different degrees of polymerization (DP). It is found out that (1) ZnCl2 aqueous solutions cannot dissolve cellulose unless the salt mass fraction is higher than 65.0%; (2) when ZnCl2 content is not less than 65.0%, the Zn2+ ions unsaturated by water molecules connect with the hydroxyl groups of cellulose, which makes the cellulose to dissolve; and (3) ZnCl2 aqueous solution with a content of 65.0% is of the best dissolving ability for cellulose, and the ability decreases with the increase in DP. It is also indicated by WAXD results that the regenerated cellulose is the crystalline transformation of cellulose II. Moreover, FT-IR results show that ZnCl2 aqueous solution is a direct solvent for cellulose, and that the intermolecular hydrogen bond of regenerated cellulose weakens after the dissolution.
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页码：23 / 27
页数：4
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