| 光谱学与光谱分析 |
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| Study on the Crystal Structure of Cellulose in Bamboo with Synchrotron Radiation Wide Angle X-Ray Scattering |
| AN Xin1,2, YANG Shu-min2, LIU Rong2, WEI Peng-lian2, YANG Chun-ming3*, FEI Ben-hua2* |
1. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
2. International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, Beijing 100102, China
3. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China |
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Abstract The crystal structure of cellulose will directly affect the properties of bamboo fiber -reinforced composite, but the unit cell of native cellulose in bamboo has never been investigated. The most accepted model for the structure of native cellulose is Meyer-Misch model which provides a reference to understand the unit cell of native cellulose in bamboo. The native cellulose consists of two different crystal structures (Ⅰα and Ⅰβ) which exist in different plants with different proportions. Because of this situation, the crystal structure of bamboo cellulose should have a unique model. The moso bamboo (Phyllostachys edulis (Carr. ) H. de Lehaie)was selected. The crystal structure of cellulose of bamboo was investigated with two dimensional synchrotron radiation wide angle X-ray scattering (SR-WAXS). The values of the interplanar spacings of each peak were obtained from SR-WAXS patterns, and then crystal structure parameters were calculated according to monoclinic crystal system. The results show that the fibre axis of a bamboo cellulose unit cell with a monoclinic unit cell of a=8.35 , b (fiber axis)=10.38 , c=8.02 , β=84.99°. This model has a two antiparallel arrangement for the chains in unit cell, with four glucose residues. Thus, the model may be used to provide a theoretical basis for high value-added bamboo fiber -reinforced composite.
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Received: 2015-11-03
Accepted: 2016-03-11
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Corresponding Authors:
YANG Chun-ming, FEI Ben-hua
E-mail: feibenhua@icbr.ac.cn;yangchunming@sinap.ac.cn
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