Synthesis and Characterization of Bagasse Xylan Chlorosulfonate from the Chlorosulfonic Acid/Pyridine Method

Abstract

Bagasse xylan chlorosulfonate was synthesized by the esterification between bagasse xylan and esterification agent which was prepared by the chlorosulfonation from chlorosulfonic acid and pyridine. The effect of reaction parameters such as reaction temperature and reaction time was investigated for esterification of bagasse xylan with chlorosulfonic acid by single factor experiment. The degree of substitution (DS) of Bagasse xylan chlorosulfonate was up to 1.41 when the reaction was performed at temperature 45°C for 4.0h. The IR spectrometry revealed characteristic absorption peaks of the S=O and S―O at 1121.78cm-1 and 803.20cm-1, and this explained that bagasse xylan backbone has been joined the sulfate radical groups and bases successfully. The microstructure of bagasse xylan chlorosulfonate was also investigated by SEM.