Ionic-Liquid-Derived, Water-Soluble Ionic Cellulose
- Ionic-Liquid-Derived, Water-Soluble Ionic Cellulose
- 휴옌 딴 보; 김영진; 전은희; 김창수; 김훈식; 이현주
- cellulose; ionic liquids; phosphorylation; water solubility; X-ray diffraction
- Issue Date
- Chemistry : a European journal
- VOL 18, NO 29, 9019-9023
- 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?°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°C and a substantial amount of residue remained at 500°C.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.