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Ulf Olsson. Portrait.

Ulf Olsson

Professor

Ulf Olsson. Portrait.

Scanning WAXS microscopy of regenerated cellulose fibers at mesoscopic resolution

Author

  • Sara Johansson
  • Francesco Scattarella
  • Sebastian Kalbfleisch
  • Ulf Johansson
  • Christopher Ward
  • Crispin Hetherington
  • Herbert Sixta
  • Stephen Hall
  • Cinzia Giannini
  • Ulf Olsson

Summary, in English

In this work, regenerated cellulose textile fibers, Ioncell-F, dry-wet spun with different draw ratios, have been investigated by scanning wide-Angle X-ray scattering (WAXS) using a mesoscopic X-ray beam. The fibers were found to be homogeneous on the 500nm length scale. Analysis of the azimuthal angular dependence of a crystalline Bragg spot intensity revealed a radial dependence of the degree of orientation of crystallites that was found to increase with the distance from the center of the fiber. We attribute this to radial velocity gradients during the extrusion of the spin dope and the early stage of drawing. On the other hand, the fiber crystallinity was found to be essentially homogeneous over the fiber cross section.

Department/s

  • Solid Mechanics
  • LU Profile Area: Natural and Artificial Cognition
  • MAX IV, NanoMAX
  • Physical Chemistry
  • MAX IV, SEDS
  • Centre for Analysis and Synthesis
  • NanoLund: Centre for Nanoscience
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • LU Profile Area: Light and Materials

Publishing year

2024

Language

English

Pages

570-577

Publication/Series

IUCrJ

Volume

11

Issue

Pt 4

Document type

Article

Publisher

International Union of Crystallography

Topic

  • Materials Engineering

Keywords

  • crystal growth
  • crystallization
  • materials science
  • nanofocus X-ray probe
  • properties of solids Vetenskapsrådet
  • regenerated cellulose fibers
  • scanning WAXS

Status

Published

ISBN/ISSN/Other

  • ISSN: 2052-2525