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Structural and thermal characterization of sugarcane bagasse cellulose succinates prepared in ionic liquid |
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| Authors: | CF Liu AP Zhang ZC Geng |
| Institution: | a State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China b College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China c College of Forestry, The North-Western University of Agricultural and Forest Sciences and Technology, Yangling 712100, China |
| Abstract: | The chemical modification of SCB cellulose with succinic anhydride using 1-butyl-3-methylimidazolium chloride ionic liquid/DMSO system as reaction medium was studied. The parameters including the molar ratio of succinic anhydride/anhydroglucose units in cellulose from 1:1 to 12:1, reaction time 5-120 min, and reaction temperature 85-105 °C were investigated. The results showed that the degree substitution of succinylated cellulosic preparations ranged from 0.037 to 0.53. It was found that the treatment of the native cellulose in the ionic liquid/DMSO system under the conditions given significantly degraded the cellulose and completely destroyed the cellulose crystals. FT-IR and solid-state CP/MAS 13C NMR spectra produced evidence for succinoylation reaction and the results showed that succinoylation occurred at positions C-6, C-2 and C-3. The thermal stability of the succinylated cellulose decreased upon chemical modification. |
| Keywords: | Cellulose Ionic liquid Succinic anhydride Degradation Thermal stability |
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