The colloidal structure of a cellulose fiber
(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.].
(Less)
- author
- Gubitosi, Marta LU ; Asaadi, Shirin ; Sixta, Herbert and Olsson, Ulf LU
- organization
- publishing date
- 2021-02-08
- 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
- 2022-04-27 00:32:51
@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}},
keywords = {{Crystal orientation; Crystal shape; Regenerated cellulose fibers; SAXS/WAXS}},
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}},
}