Structural and thermal characterization of sugarcane bagasse phthalates prepared with ultrasound irradiation |
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Authors: | CF Liu J Ye |
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Institution: | State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China |
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Abstract: | Chemical modification of sugarcane bagasse was achieved by esterification with phthalic anhydride in pyridine after ultrasound irradiation. The parameters including ultrasonic irradiation time 0-40 min, phthalic anhydride dosage 2.5-7.5 g, reaction time 30-150 min, and reaction temperature 80-115 °C were optimised and the extent of phthalation was measured by weight percent gain. It was found that degradation of the cell wall polymers occurred at higher temperature (>90 °C) under the experimental conditions used.FT-IR and CP/MAS 13C NMR spectroscopy studies also clearly produced evidence for phthalation reaction. The phthalated bagasse preparations showed decreased thermal stability after chemical modification. |
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Keywords: | Sugarcane bagasse Phthalic anhydride Chemical modification Phthalation Ultrasound |
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