Ionic-Liquid-Derived, Water-Soluble Ionic Cellulose

被引：25

作者：

Huyen Thanh Vo ^{[2
,3
]}

Kim, Young Jin ^{[1
]}

Jeon, Eun Hee ^{[1
]}

Kim, Chang Soo ^{[2
]}

Kim, Hoon Sik ^{[1
]}

Lee, Hyunjoo ^{[2
,3
]}

机构：

[1] Kyung Hee Univ, Dept Chem & Basic, Seoul, South Korea

[2] Korean Inst Sci & Technol, Clean Energy Ctr, Seoul 305355, South Korea

[3] Univ Sci & Technol, Taejon 305355, South Korea

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2012年 / 18卷 / 29期

关键词：

cellulose; ionic liquids; phosphorylation; water solubility; X-ray diffraction; PHOSPHORYLATED CELLULOSE; PHOSPHATES;

D O I：

10.1002/chem.201200982

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new type of water-soluble ionic cellulose was obtained by means of the dissolution of cellulose in dimethylimidazolium methylphosphite at elevated temperatures over 120?degrees C. FTIR spectroscopy, 1H and 13C NMR spectroscopy, and elemental analysis results revealed that the repeating unit of the water-soluble cellulose consists of a dialkylimidazolium cation and a phosphite anion bonded to cellulose. The degree of phosphorylation on the cellulose chain was between 0.4 and 1.3 depending on the reaction temperature and time. With an increasing degree of phosphorylation, water solubility was increased. Scanning electron microscopy and X-ray diffraction analyses revealed that the cellulose crystalline phase in the parent crystalline cellulose changed to an amorphous phase upon transformation into ionic cellulose. Thermogravimetric analysis showed the prepared phosphorylated cellulose was stable over 250?degrees C and a substantial amount of residue remained at 500?degrees C.

引用

页码：9019 / 9023

页数：5

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