Abstract:

:Bagasse was mechanically activated using a self-designed stirring-type ball mill, and the effects of mechanical activation on the surface morphology, crystal structure, functional groups of bagasse were characterized by means of SEM, XRD and FT-IR. The results show that （ 1 ） after the mechanical activation, the particle size of bagasse remarkably decreases, the crystal structure of bagasse fibers are destroyed, and the amorphous region enlarges due to the loading of mechanical force ; （2） both the crystallinity and the grain size of bagasse celluloses decrease after the mechanical activation, and an activation for 2.0 h may result in the crystallinity declines from 61.6% to 43.4% as well as the grain size of 002 plane decrease from 2. 243 nm to 1.512 nm; and （3） during the mechanical activation, no new functional groups are generated and the crystal type remains as cellulose Ⅰ

Key words: bagasse, mechanical activation, surface morphology, crystal structure