Tensile deformation of bacterial cellulose composites

被引:76
作者
Astley, OM
Chanliaud, E
Donald, AM
Gidley, MJ
机构
[1] Cavendish Lab, Cambridge CB3 0HE, England
[2] Unilever Res Colworth, Sharnbrook MK44 1LQ, Beds, England
基金
英国生物技术与生命科学研究理事会;
关键词
acetobacter; scattering; mechanical properties;
D O I
10.1016/S0141-8130(03)00022-9
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 polymeric basis for the mechanical properties of primary plant cell walls has been investigated by forming analogous composites based on fermentation of the bacterium Acetobacter xylinus, either alone or in the presence of xyloglucan or pectin. Simultaneous small-angle X-ray scattering and uniaxial deformation experiments has shown how the cellulose microfibrils reorient during deformation. Despite very different stress/strain curves, the reorientation behaviour is similar, regardless of the presence or absence of xyloglucan or pectin. A simple theory has been developed to predict the orientation behaviour. This is qualitatively similar to the measured behaviour, but differs quantitatively. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:28 / 35
页数:8
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