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.].
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- 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
- 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}, }