Mechanical properties of cellulose fibres and wood. Orientational aspects in situ investigated with synchrotron radiation.
Mechanical properties of cellulose fibres and wood. Orientational aspects in situ investigated with synchrotron radiation.
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纤维素纤维和木材的机械性能。
DOI：
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发表时间：
2005
影响因子：
2.5
通讯作者：
Martin Müller
中科院分区：
文献类型：
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作者：
Klaas Kölln;I. Grotkopp;M. Burghammer;S. Roth;S. Funari;M. Dommach;Martin Müller
通过 X 射线衍射研究了高度定向的天然纤维素纤维（亚麻）和软木（松木）。通过使用 X 射线微束获得局部结构信息。原位进行拉伸测试，揭示了具有拉伸应变的材料中纤维素微纤丝的取向变化。在亚麻纤维中，微纤维在第一个百分比的拉伸过程中旋转，形成相对于纤维轴更加平行的方向。对于木材，首次发现随着应变硬化的开始取向度降低。
Highly oriented native cellulose fibres (flax) and softwood (pine) have been investigated by means of X-ray diffraction. Local structural information was obtained by using X-ray microbeams. Tensile tests were performed in situ, revealing a change of orientation of cellulose microfibrils in materials with tensile strain. In flax fibres, the microfibrils rotate during the first percent of stretching, into a more parallel orientation with respect to the fibre axis. For wood, a decrease of orientation with the onset of strain hardening is found for the first time.