Scanning WAXS microscopy of regenerated cellulose fibers at mesoscopic resolution

被引:2
|
作者
Johansson, Sara [1 ]
Scattarella, Francesco [2 ]
Kalbfleisch, Sebastian [3 ]
Johansson, Ulf [3 ]
Ward, Christopher [3 ,4 ]
Hetherington, Crispin [5 ]
Sixta, Herbert [6 ]
Hall, Stephen [1 ]
Giannini, Cinzia [2 ]
Olsson, Ulf [4 ]
机构
[1] Lund Univ, Div Solid Mech, Box 118, SE-22100 Lund, Sweden
[2] CNR, Inst Crystall, Via Amendola 122-O, I-70126 Bari, Italy
[3] Lund Univ, MAX IV Lab, Box 118, SE-22100 Lund, Sweden
[4] Lund Univ, Phys Chem, Box 124, SE-22100 Lund, Sweden
[5] Lund Univ, Ctr Anal & Synth, Natl Ctr High Resolut Elect Microscopy, Box 124, SE-22100 Lund, Sweden
[6] Aalto Univ, Dept Bioprod & Biosyst, POB 16300, Helsinki 00076, Finland
来源
IUCRJ | 2024年 / 11卷
基金
瑞典研究理事会;
关键词
nanofocus X-ray probe; scanning WAXS; regenerated cellulose fibers; materials science; crystallization; crystal growth; properties of solids; X-RAY-DIFFRACTION; IONCELL-F; DEFORMATION; DISSOLUTION;
D O I
10.1107/S205225252400383X
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 500 nm 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.
引用
收藏
页码:570 / 577
页数:8
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