Deformation mechanisms in cellulose fibres, paper and wood
Deformation mechanisms in cellulose fibres, paper and wood
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DOI：
10.1023/a:1017969916020
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发表时间：
2001-07-01
影响因子：
4.5
通讯作者：
Young, RJ
中科院分区：
文献类型：
--
作者：
Eichhorn, SJ;Sirichaisit, J;Young, RJ
利用拉曼光谱在探测纤维素纤维（再生和天然），和两个天然纤维素复合材料系统（木材和纸张）的变形机制进行了说明。结果表明，在拉伸变形过程中，1095 cm（-1）的拉曼带，对应于纤维素环结构的拉伸，移向一个较低的波数，由于分子的变形。通过分析许多具有不同微观结构的纤维，这种转变对于理解这些材料变形的微观机制非常有价值。此外，拉曼谱带位移的速率被证明是不变的应力为所有的纤维类型，与纤维的微观结构的基础上修改的系列聚集模型。在复合系统中，如木材和纸张，它示出的应力诱导的拉曼谱带移动的纤维素给出了一个重要的洞察其局部变形微观力学。(C)2001 Kluwer Academic Publishers.
The use of Raman spectroscopy in probing the deformation mechanisms of cellulose fibres (regenerated and natural), and two natural cellulose composite systems (wood and paper) is described. It is shown that during tensile deformation the 1095 cm(-1) Raman band, corresponding to the stretching of the cellulose ring structure, shifts towards a lower wavenumber due to molecular deformation. By analysing a number of fibres with different microstructures this shift is shown to be invaluable in understanding the micromechanisms of deformation in these materials. Moreover, the rate of Raman band shift is shown to be invariant with stress for all fibre types, consistent with a fibre microstructure based on a modified series aggregate model. In the composite systems, such as wood and paper, it is shown that the stress-induced Raman band shift in the cellulose gives an important insight into their local deformation micromechanics. (C) 2001 Kluwer Academic Publishers.