摘要
本文以微晶纤维素Ｓｉｇｍａｃｅｌｔｙｐｅ５０为材料，用扫描隧道显微镜（ＳＴＭ）对其结构进行了研究，结果表明用ＳＴＭ可以直接观察到纤维素的基原纤丝（ｅｌｅｍｅｎｔａｒｙｆｉｂｒｉｌ），其直径为２—３纳米。从表面观察，微晶纤维素的基原纤丝平行排列在一起，其本身呈螺旋状，基原纤丝进一步聚合在一起，形成微纤丝（ｍｉｃｒｏｆｉｂｒｉｌ）。从横切面也观察到了基原纤丝的大小和排列。从纳米水平直接观察到基原纤丝的结构尚属首次，ＳＴＭ是观察纤维素超显微结构的有效工具。
Scanning tunneling microscope (STM) was used to investigate the ultrastructure of microcrystalline cellulose.It was resulted that the smallest structural unit cellulose elementary fibril(ECF) was directly observed with STM.From the surface view,CEF arranged in parallel,and was spiral in shape.The arrangement of CEF was also seen from the cross section and its diameter was 2 3nm.It was the first time to directly observe the structure of CEF from the real space at nanometer scale.STM was potential in investigating the ultrastructure of cellulose.
出处
《电子显微学报》
CAS
CSCD
1997年第6期736-738,共3页
Journal of Chinese Electron Microscopy Society
基金
自然科学基金
关键词
扫描隧道显微镜
微晶纤维素
基原纤丝
Scanning tunneling microscope,,microcrystalline cellulose,,cellulose elementary fibril
