Cellulose synthesized by Acetobacter xylinum in the presence of multi-walled carbon nanotubes

被引：59

作者：

Yan, Zhiyong ^{[1
]}

Chen, Shiyan ^{[1
]}

Wang, Huaping ^{[1
]}

Wang, Biao ^{[1
]}

Wang, Chaosheng ^{[1
]}

Jiang, Jianming ^{[1
]}

机构：

[1] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

来源：

CARBOHYDRATE RESEARCH | 2008年 / 343卷 / 01期

关键词：

bacterial cellulose; MWNTs; cellulose I-alpha; cellulose I-beta; crystallinity index;

D O I：

10.1016/j.carres.2007.10.024

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The structure of bacterial cellulose is affected by the bacterial strain used, culture media and cultivation conditions. In this study, acid-treated multi-walled carbon nanotubes (MWNTs) were added into a static culture medium and their effect on bacterial cellulose structure was studied by scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FT-IR), CP/MAS C-13 NMR and X-ray diffractometry. The bacterial cellulose ribbons and the MWNTs inter-wound and formed a three-dimensional network architecture. Band-like assemblies with sharp bends and rigidity were also produced in the presence of MWNTs. The intermolecular hydrogen bonds in bacterial cellulose produced in the presence of MWNTs were weakened. The crystal structure, cellulose I-alpha content, crystallinity index (CrI) and crystallite size all changed. The results may suggest that the acid-treated MWNTs containing hydroxyl groups interact with the sub-elementary bacterial cellulose fibrils, subsequently interfering with the aggregation and crystallization. (c) 2007 Published by Elsevier Ltd.

引用

页码：73 / 80

页数：8

共 45 条

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