CP/MAS^(13)C NMR光谱法分析烟草纤维素的结构  

Analysis of tobacco cellulose structure by CP / MAS ^(13)C NMR spectroscopy

作　　者：冯广林 谭兰兰 朱晓兰[2] 高芸[2] 戴亚 

机构地区：[1]川渝中烟工业有限责任公司技术研发中心,成都610017 [2]中国科学技术大学烟草与健康研究中心,合肥230052

出　　处：《中国烟草学报》2015年第5期1-8,共8页Acta Tabacaria Sinica

基　　金：川渝中烟工业公司科技基金项目(合同号:JL/CYZY G SJ003-04)

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。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.

关 键 词：烟草 纤维素 CP/MAS NMR光谱 结晶结构 

分 类 号：TS42[农业科学—烟草工业] O657.3[理学—分析化学]