Amphoteric Modification of Sugarcane Bagasse Hemicelluloses and Characterization of the Novel Derivatives

Abstract

Modifiers were applied to make amphoteric modification on sugarcane bagasse hemicelluloses amount of modifiers and sodium hydroxide, reaction temperature, reaction time, the order of modification etc., would have some impact on the gender modification. Results showed that optimal cationic modified product could be obtained with 0.3 g (3-chloro-2-hydroxypropyl) trimethylammonium chloride and 0.1 g sodium hydroxide at 60 ºC for 2 h; optimal anionic modified product could be obtained with 0.4 g chloro-acetic acid and 0.3 g sodium hydroxide at 80 ºC for 2 h. Better gender modified products could be achieved as the order of anionic modification as the first. IR, NMR, scanning electronic microscopy and thermal analysis were used to characterize gender modified bagasse hemicelluloses. Amphoteric method in this study could draw carboxyl and quaternary ammonium into sugarcane bagasse hemicelluloses and molecular structure and morphology of sugarcane bagasse hemicelluloses after amphoteric modification were pointed out, with its thermal stability decreased.