Citation: Xin Gui LI, Mei Rong HUANG. LYOTROPIC AND THERMOTROPIC LIQUID CRYSTALL INE TRIALKYL CELLULOSES OBTAINED DIRECTLY FROM CELLULOSE ACETATE IN DIMETHYL SULFOXIDE[J]. Chinese Chemical Letters, ;1992, 3(7): 573-576. shu

LYOTROPIC AND THERMOTROPIC LIQUID CRYSTALL INE TRIALKYL CELLULOSES OBTAINED DIRECTLY FROM CELLULOSE ACETATE IN DIMETHYL SULFOXIDE

Xin Gui LI ^a,b ,
Mei Rong HUANG ^b

a Institute of Membrane Separation Engineering, Tianjin Institute of Textite Science and Technology, Tianjin 300160;
b Department of Textile Chemical Engineering, Tianjin Institute of Textite Science and Technology, Tianjin 300160

Received Date: 5 March 1992

Fund Project: The authors gratefully acknowledge the financial supports provided by National Natural Science Foundation (No. 59U03462) and Tianjin 21st Century Young Science Foundation toward this research.

Highly substituted n-atkyl celluloses with sidechains 3 to 10 carbon atoms long have been prepared from cellulose acetate, sodium hydroxide and n-alkyl bromides with dimethyl sulfoxide as solvent. Synthetic conditions of n-alkyl celluloses were studied with respect to reaction temperature, time and yield. The molecular structure of the n-alkyl celluloses, which were obtained as white powders or as sticky, soft and birefringent solids at room temperature, was investigated by IR and NMR spectra and elemental analysine cholesteric phases in some non-polar solvents. The melting behavior and solubility of the n-alkyl celluloses were examined.
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