Molecular interactions in bacterial cellulose composites studied by 1D FT-IR and dynamic 2D FT-IR spectroscopy

被引:202
作者
Kacuráková, M
Smith, AC
Gidley, MJ
Wilson, RH
机构
[1] Inst Food Res, Norwich Lab, Norwich NR4 7UA, Norfolk, England
[2] Unilever Res, 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
cellulose composites; FT-IR spectroscopy; dynamic 2D FT-IR spectroscopy; linear stretching;
D O I
10.1016/S0008-6215(02)00102-7
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
Specific strain-induced orientation and interactions in three Acetobacter cellulose composites: cellulose (C), cellulose/pectin (CP) and cellulose/xyloglucan (CXG) were characterized by FT-IR and dynamic 2D FT-IR spectroscopies. On the molecular level, the reorientation of the cellulose fibrils occurred in the direction of the applied mechanical strain. The cellulose-network reorientation depends on the composition of the matrix, including the water content, which lubricates the motion of macromolecules in the network. At the submolecular level, dynamic 2D FT-IR data suggested that there was no interaction between cellulose and pectin in CP and that they responded independently to a small amplitude strain, while in CXG, cellulose and xyloglucan were uniformly strained along the sample length. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1145 / 1153
页数:9
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