Advanced

Revisiting the dissolution of cellulose in NaOH as "Seen" by X-rays

Martin-Bertelsen, Birte LU ; Andersson, Erika LU ; Köhnke, Tobias ; Hedlund, Artur ; Stigsson, Lars LU and Olsson, Ulf LU (2020) In Polymers 12(2).
Abstract

Cotton production is reaching a global limit, leading to a growing demand for bio-based textile fibers produced by other means. Textile fibers based on regenerated cellulose from wood holds great potential, but in order to produce fibers, the components need to be dissolved in suitable solvents. Furthermore, the dissolution process of cellulose is not yet fully understood. In this study, we investigated the dissolution state of microcrystalline cellulose in aqueous NaOH by using primarily scattering methods. Contrary to previous findings, this study indicated that cellulose concentrations of up to 2 wt % are completely molecularly dissolved in 8 wt % NaOH. Scattering data furthermore revealed the presence of semi-flexible cylinders with... (More)

Cotton production is reaching a global limit, leading to a growing demand for bio-based textile fibers produced by other means. Textile fibers based on regenerated cellulose from wood holds great potential, but in order to produce fibers, the components need to be dissolved in suitable solvents. Furthermore, the dissolution process of cellulose is not yet fully understood. In this study, we investigated the dissolution state of microcrystalline cellulose in aqueous NaOH by using primarily scattering methods. Contrary to previous findings, this study indicated that cellulose concentrations of up to 2 wt % are completely molecularly dissolved in 8 wt % NaOH. Scattering data furthermore revealed the presence of semi-flexible cylinders with stiff segments. In order to improve the dissolution capability of NaOH, the effects of different additives have been of interest. In this study, scattering data indicated that the addition of ZnO decreased the formation of aggregates, while the addition of PEG did not improve the dissolution properties significantly, although preliminary NMR data did suggest a weak attraction between PEG and cellulose. Overall, this study sheds further light on the dissolution of cellulose in NaOH and highlights the use of scattering methods to assess solvent quality.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cellulose dissolution, Cold alkali (NaOH), Microcrystalline cellulose (MCC), Poly(ethylene glycole) (PEG), Small-angle X-ray-scattering (SAXS), Static light scattering (SLS), ZnO
in
Polymers
volume
12
issue
2
article number
342
publisher
MDPI AG
external identifiers
  • pmid:32033419
  • scopus:85080877580
ISSN
2073-4360
DOI
10.3390/polym12020342
language
English
LU publication?
yes
id
45141ac7-1866-4c50-875a-30fdb25408ec
date added to LUP
2020-03-18 16:59:43
date last changed
2020-09-16 04:42:38
@article{45141ac7-1866-4c50-875a-30fdb25408ec,
  abstract     = {<p>Cotton production is reaching a global limit, leading to a growing demand for bio-based textile fibers produced by other means. Textile fibers based on regenerated cellulose from wood holds great potential, but in order to produce fibers, the components need to be dissolved in suitable solvents. Furthermore, the dissolution process of cellulose is not yet fully understood. In this study, we investigated the dissolution state of microcrystalline cellulose in aqueous NaOH by using primarily scattering methods. Contrary to previous findings, this study indicated that cellulose concentrations of up to 2 wt % are completely molecularly dissolved in 8 wt % NaOH. Scattering data furthermore revealed the presence of semi-flexible cylinders with stiff segments. In order to improve the dissolution capability of NaOH, the effects of different additives have been of interest. In this study, scattering data indicated that the addition of ZnO decreased the formation of aggregates, while the addition of PEG did not improve the dissolution properties significantly, although preliminary NMR data did suggest a weak attraction between PEG and cellulose. Overall, this study sheds further light on the dissolution of cellulose in NaOH and highlights the use of scattering methods to assess solvent quality.</p>},
  author       = {Martin-Bertelsen, Birte and Andersson, Erika and Köhnke, Tobias and Hedlund, Artur and Stigsson, Lars and Olsson, Ulf},
  issn         = {2073-4360},
  language     = {eng},
  month        = {02},
  number       = {2},
  publisher    = {MDPI AG},
  series       = {Polymers},
  title        = {Revisiting the dissolution of cellulose in NaOH as "Seen" by X-rays},
  url          = {http://dx.doi.org/10.3390/polym12020342},
  doi          = {10.3390/polym12020342},
  volume       = {12},
  year         = {2020},
}