不同干燥方式对微晶纤维素性能的影响  

Effect of different drying methods on the properties of microcrystalline cellulose

作　　者：张美云[1,2] 王静[1] 李金宝[1,3] 

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]东华大学国家重点实验室,上海200051 [3]华南理工大学制浆造纸工程国家重点实验室,广东广州510641

出　　处：《陕西科技大学学报》2017年第3期14-17,共4页Journal of Shaanxi University of Science & Technology

基　　金：东华大学国家重点实验室开放基金项目(LK1601);华南理工大学制浆造纸工程国家重点实验室开放基金项目(201505)

摘　　要：在同一工艺条件下,制备微晶纤维素试样,并研究了鼓风、真空、冷冻和喷雾干燥对其结晶度、粒径分布和微观形貌的影响.利用X射线衍射仪对试样的衍射峰位和结晶度值进行了表征.用激光粒度仪对试样的粒径大小及分布情况进行了测试.用环境扫描电镜对试样的微观形貌进行了观察分析.结果表明,喷雾干燥处理后的微晶纤维素结晶度值大且粒径小,粒子分布更均匀,纤维挺硬,表面光滑且较为完整,长度较均一,破裂少.因此,对比发现喷雾干燥更适合与微晶纤维素的制备及应用.Under the same conditions, the microcrystalline cellulose samples were prepared, and the effects of blowing,vacuum,freezing and spray drying on the crystallinity,particle size distribution and microstructure were studied . The diffraction peaks and crystallinity of the samples were characterized by X ray diffractometer. The particle size and distribution of the samples were tested by laser particle size analyzer. The microscopic morphology of the sam-ples was observed by Environmental Scanning Electron Microscope （ESEM）. The results showed that the microcrystalline cellulose handled by spray dry had a higher crystallinity val-ue and the particle size was small and distributed uniformly. The fiber was hard and the sur-face was smooth and complete,the length is uniform and the cracking was less. Therefore,tt was found that spray drying was more suitable for the preparation and application of micro-crystalline cellulose.

关 键 词：微晶纤维素 干燥方式 结晶度 粒径 微观形貌 

分 类 号：TS712[轻工技术与工程—制浆造纸工程]