机械活化甘蔗渣的结构与表征

采用自制的搅拌球磨机对甘蔗渣进行机械活化, 用扫描电子显微镜、X-射线衍射仪、红外光谱仪等考察了机械活化对甘蔗渣表观形貌、结晶结构、分子基团的影响及变化规律. 结果表明, 机械活化使甘蔗渣颗粒明显细化, 甘蔗渣纤维晶体结构受到破坏、晶粒尺寸减小、结晶度降低, 但活化过程中并没有新的基团产生, 晶体类型保持纤维素Ⅰ型.

Structure and Characterization of Mechanical Activated Bagasse

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 2.0h may result in the crystallinity declines from 61.6% to 43.4% as well as the grain size of 002 plane decrease from 2.243nm to 1.512nm;and (3) during the mechanical activation, no new functional groups are generated and the crystal type remains as cellulose Ⅰ.