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生物质化学工程

生物质化学工程 ›› 2010, Vol. 44 ›› Issue (2): 1-4.

• 论文 •    下一篇

纳米纤维素超微结构的表征与分析

唐丽荣, 黄彪, 李玉华, 欧文, 陈学榕   

  1. 福建农林大学, 材料工程学院, 福建 福州 350002
  • 收稿日期:2009-12-28 修回日期:1900-01-01 出版日期:2010-03-30 发布日期:2010-03-30
  • 通讯作者: 黄 彪,教授,博士生导师,研究方向为植物纤维化学与炭材料;E-mail:fjhuangbiao@hotmail.com。

Characterization and Analysis of Ultrastructure of Nano-cellulose Crystal

TANG Li-rong, HUANG Biao, LI Yu-hua, OU Wen, CHENXue-rong   

  1. Institute of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
  • Received:2009-12-28 Revised:1900-01-01 Online:2010-03-30 Published:2010-03-30

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摘要： 采用场发射环境扫描电镜(FEGE-SEM)、场发射透射电镜(FETEM) 和原子力显微镜(AFM)等仪器对硫酸水解法制备的纳米纤维素(NCC)进行超微结构的表征与分析。结果表明: NCC在水分散体系中可形成非常稳定的胶状溶液。由FEGE-SEM观察到微晶纤维素(MCC)呈不规则形状,直径约为15 μm。通过硫酸水解制得形状较规整的短棒状NCC,直径范围在2～50 nm之间。FETEM观察结果与AFM成像基本一致,FETEM观察大多数NCC直径约2～24 nm,长度为50～450 nm。AFM观察样品尺寸与FETEM观察相比所测得的样品尺寸偏大,这与其质地较软有关。X射线衍射(XRD)图谱表明NCC属于纤维素Ⅰ型,与MCC相比,结晶度由72.25%增大到77.29%。

关键词: 纳米纤维素, 超微结构, 分析

Abstract: The ultrastructure characterization and analysis of nano-cellulose crystal (NCC) preparing from sulfuric acid hydrolysis were investigated using field emission gun enviro nment scanning electron microscopes (FEGE-SEM), field emission transmission electron microscopy (FETEM) and atomic force microscopy (AFM). The results showed that NCC dispersed in water can form a very stable suspension. It can be observed that microcrystalline cellulose (MCC) has irregular shape with diameter about 15 μm using FEGE-SEM. Regular short rod-like NCC can be obtained by sulfuric acid hydrolysis. The diameter of NCC was in the range of 2-50 nm. The results of AFM were in agreement with FETEM. Images of FETEM clearly reveals that the diameter of NCC was about 2-24 nm, with the length of 50-450 nm. The size of NCC observed from AFM was a little bigger than that of FETEM, it can be contributed to the soft texture of cellulose. The X-ray diffraction (XRD) pattern shows that the NCC has the celluloseⅠcrystal form. The crystallinity of NCC increased from 72.25% to 77.29%.

Key words: nano-cellulose crystal, ultrastructure, analysis

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