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The colloidal structure of a cellulose fiber

Gubitosi, Marta LU ; Asaadi, Shirin ; Sixta, Herbert and Olsson, Ulf LU (2021) In Cellulose 28(5). p.2779-2789
Abstract

Abstract: We present a small angle X-ray scattering (SAXS) study of the colloidal structure of regenerated cellulose fibers, air-gap spun from an ionic liquid solution. Based on the data, and a different interpretation of the anisotropic SAXS pattern, we propose a slightly different colloidal structure of the fibers, than what is commonly assumed for regenerated cellulose fibers. Fibers with two different degrees of orientation, as produced by different draw ratios, DR = 2 and 15, respectively, are analyzed. The 2D SAXS pattern is highly anisotropic with striking cross-like pattern, having scattering predominantly perpendicular and parallel to the fiber axis. This cross-like pattern suggest a colloidal structure with oriented... (More)

Abstract: We present a small angle X-ray scattering (SAXS) study of the colloidal structure of regenerated cellulose fibers, air-gap spun from an ionic liquid solution. Based on the data, and a different interpretation of the anisotropic SAXS pattern, we propose a slightly different colloidal structure of the fibers, than what is commonly assumed for regenerated cellulose fibers. Fibers with two different degrees of orientation, as produced by different draw ratios, DR = 2 and 15, respectively, are analyzed. The 2D SAXS pattern is highly anisotropic with striking cross-like pattern, having scattering predominantly perpendicular and parallel to the fiber axis. This cross-like pattern suggest a colloidal structure with oriented crystalline lamellae of ca. 10 nm thickness, embedded within a continuous matrix of amorphous cellulose. The lamellae are oriented with their normal parallel with the fiber axis. Complementary wide angle X-ray diffraction data confirm that the lamellae normal direction corresponds to the cellulose chain direction (c-direction) in the monoclinic cellulose crystal (Cellulose II). Graphic abstract: [Figure not available: see fulltext.].

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Crystal orientation, Crystal shape, Regenerated cellulose fibers, SAXS/WAXS
in
Cellulose
volume
28
issue
5
pages
2779 - 2789
publisher
Springer
external identifiers
  • scopus:85100804453
ISSN
0969-0239
DOI
10.1007/s10570-021-03711-2
language
English
LU publication?
yes
id
2bd9b230-dc13-4bb7-b651-19a8907c8bcc
date added to LUP
2021-03-04 09:21:34
date last changed
2021-04-16 18:28:31
@article{2bd9b230-dc13-4bb7-b651-19a8907c8bcc,
  abstract     = {<p>Abstract: We present a small angle X-ray scattering (SAXS) study of the colloidal structure of regenerated cellulose fibers, air-gap spun from an ionic liquid solution. Based on the data, and a different interpretation of the anisotropic SAXS pattern, we propose a slightly different colloidal structure of the fibers, than what is commonly assumed for regenerated cellulose fibers. Fibers with two different degrees of orientation, as produced by different draw ratios, DR = 2 and 15, respectively, are analyzed. The 2D SAXS pattern is highly anisotropic with striking cross-like pattern, having scattering predominantly perpendicular and parallel to the fiber axis. This cross-like pattern suggest a colloidal structure with oriented crystalline lamellae of ca. 10 nm thickness, embedded within a continuous matrix of amorphous cellulose. The lamellae are oriented with their normal parallel with the fiber axis. Complementary wide angle X-ray diffraction data confirm that the lamellae normal direction corresponds to the cellulose chain direction (c-direction) in the monoclinic cellulose crystal (Cellulose II). Graphic abstract: [Figure not available: see fulltext.].</p>},
  author       = {Gubitosi, Marta and Asaadi, Shirin and Sixta, Herbert and Olsson, Ulf},
  issn         = {0969-0239},
  language     = {eng},
  month        = {02},
  number       = {5},
  pages        = {2779--2789},
  publisher    = {Springer},
  series       = {Cellulose},
  title        = {The colloidal structure of a cellulose fiber},
  url          = {http://dx.doi.org/10.1007/s10570-021-03711-2},
  doi          = {10.1007/s10570-021-03711-2},
  volume       = {28},
  year         = {2021},
}