Radial crystalline texture in a lyocell fibre revealed by synchrotron nanofocus wide-angle X-ray scattering

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• 作者：Wolfgang Gindl-Altmutter (1)
  Stephen J. Eichhorn (2)
  Manfred Burghammer (3)
  Jozef Keckes (4)
  
• 关键词：Crystallinity ; Lyocell ; Preferred orientation ; X ; ray scattering
• 刊名：Cellulose
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：21
• 期：1
• 页码：845-851
• 全文大小：477 KB
• 作者单位：Wolfgang Gindl-Altmutter (1)
  Stephen J. Eichhorn (2)
  Manfred Burghammer (3)
  Jozef Keckes (4)
  
  1. BOKU, University of Natural Resources and Life Sciences, Vienna, Konrad Lorenz Strasse 24, 3430, Tulln, Austria
  2. Physics/Engineering, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK
  3. European Synchrotron Radiation Facility (ESRF), 6 Rue Jules Horowitz BP 220, 38043, Grenoble Cedex 9, France
  4. Department of Materials Physics, University of Leoben, Jahnstrasse 12, 8700, Leoben, Austria
  
• ISSN：1572-882X

文摘

Within-fibre variability of the degree of preferred orientation of cellulose crystals and crystallinity was studied in lyocell. Wide-angle X-ray scattering experiments were performed with whole single fibres and thin axial fibre sections at the synchrotron nanofocus beamline at the European Synchrotron Radiation Facility. Experimental evidence demonstrates that skin–core differences in the degree of preferred orientation of crystals in lyocell are more pronounced than experiments with whole single fibres are capable of revealing. Similar differences in crystallinity are detected in thin sections whereas they remain obscured in whole single fibres due to averaging. Finally, substantial evidence for a radial crystal texture in lyocell is provided.