机械活化甘蔗渣的结构与表征  

Structure and Characterization of Mechanically Activated Bagasse

作　　者：黄祖强[1] 高利[1] 梁兴唐[1] 胡华宇[1] 童张法[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《华南理工大学学报（自然科学版）》2009年第12期75-80,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：广西壮族自治区自然科学基金资助项目(0640006);广西大学科研基金资助项目(X071025)

摘　　要：采用自制的搅拌球磨机对甘蔗渣进行机械活化,利用扫描电子显微镜、X射线衍射仪、傅里叶变换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、分子基团的影响及相应的变化规律。结果表明:机械活化使甘蔗渣颗粒明显细化;机械力作用使甘蔗渣纤维的晶体结构受到破坏,无定形部分增加;机械活化使甘蔗渣纤维素的晶粒尺寸减小、结晶度降低,活化2.0h后,结晶度由原来的61.6%降低到43.4%,002晶面的晶粒尺寸由原来的2.243nm减小到1.512nm;活化过程中没有新的基团产生,晶体类型仍为纤维素Ⅰ型。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.

关 键 词：甘蔗渣 机械活化 表观形貌 结晶结构 

分 类 号：O636.11[理学—高分子化学] TQ352.62[理学—化学]