| CP/MAS 13C NMR光谱法分析烟草纤维素的结构 |
| |
| 引用本文： | 冯广林,谭兰兰,朱晓兰,高芸,戴亚.CP/MAS 13C NMR光谱法分析烟草纤维素的结构[J].中国烟草学报,2015,21(5):1-8. |
| |
| 作者姓名： | 冯广林 谭兰兰 朱晓兰 高芸 戴亚 |
| |
| 作者单位： | 1 川渝中烟工业有限责任公司技术研发中心, 成都 610017; |
| |
| 基金项目： | 川渝中烟工业公司科技基金项目(合同号:JL/CYZYGSJ003-04) |
| |
| 摘 要： | 采用交叉极化/魔角旋转(CP/MAS) 13C NMR光谱法结合光谱拟合技术对酸性洗涤剂洗脱的烟草纤维素样品进行了晶体结构分析,光谱峰的拟合结果显示烟草纤维素晶型以 Iβ为主要晶体形式,烟草纤维素的结晶度在 50%左右。烟草纤维素基原纤尺寸在 3.0-5.0 nm之间,基原纤聚集束的尺寸在 6-13 nm。此项研究可以为纤维素改性、烟草加工以及低次烟叶和烟梗的处理等方面提供重要的理论依据。
|
| 关 键 词： | 烟草 纤维素 CP/MAS NMR光谱 结晶结构 |
| 收稿时间： | 2014-06-14 |
Analysis of tobacco cellulose structure by CP/MAS 13C NMR spectroscopy |
| |
| Affiliation: | 1 Technology Center, China Tobacco Chuanyu Industrial Corporation, Chengdu 610066, China;2 Centre for Tobacco and Health Research, University of Science and Technology of China, Hefei 230052, China |
| |
| Abstract: | A method utilizing CP/MAS 13C NMR spectra was developed for analyzing tobacco cellulose structure. The NMR spectra in combination with spectral fitting were analyzed and structure parameters such as cellulose crystallinity, allomorph composition and lateral dimensions for cellulose elementary fibrils and microfibrils were determined. Results showed that the main allomorph composition in tobacco cellulose was Iβ. The cellulose crystallinity calculated by spectral fitting was about 50%. The lateral dimensions for cellulose elementary fibrils and microfibrils were in the range of 3.0-5.0nm and 6.0-13.0nm, respectively. This study could provide theoretical basis for improving cellulose structure, and stem and leaf tobacco processing. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国烟草学报》浏览原始摘要信息 |
|
点击此处可从《中国烟草学报》下载全文 |
|
