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JSIR Vol.66 [2007] >
JSIR Vol.66(12) [December 2007] >
| Title: | Synthesis and properties of fatty acid esters of cellulose |
| Authors: | Wei, Yuping
Cheng, Fa
Hou, Guili |
| Keywords: | Cellulose
Cellulose esterification
Cellulose esters
DMAc/LiCl |
| Issue Date: | Dec-2007 |
| Publisher: | CSIR |
| Abstract: | Cellulose esters with linear aliphatic acyl substituents [C8 (octanoyl chloride) to C18 (stearoyl chloride)] were synthesized
in homogeneous solution (DMAc/LiCl) using triethylamine (TEA) as acid-scavenger and characterized by means of elemental
analysis, FT-IR and CP/MAS ¹³C Solid State NMR spectroscopy. Wide angle X-ray diffraction (WAXD), Scanning electron
microscopy (SEM) and differential scanning calorimetry (DSC) showed that solvent exchange has no effects on the crystallinity
of cellulose, but crystallinity structure was destroyed after esterification in DMAc/LiCl homogeneous solution. SEM results
suggested that fibril structure was also destroyed after esterification. Glass transition temperature (T
ℊ) of cellulose octaonate
(C8) increased linearly with degree of substitution (DS) from 61°C for 0.08 to 172°C for 1.57. At the experimental conditions,
side-chain crystallization occurred with increasing linear aliphatic side-chain length to C18. |
| Page(s): | 1019-1024 |
| ISSN: | 0022-4456 |
| Source: | JSIR Vol.66(12) [December 2007]
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