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Dissolution state of cellulose in aqueous systems. 1. Alkaline solvents

Alves, Luis; Medronho, Bruno; Antunes, Filipe E.; Topgaard, Daniel LU and Lindman, Bjorn (2016) In Cellulose 23(1). p.247-258
Abstract
The understanding of the state of dissolution of cellulose in a certain solvent is a critical step forward in the development of new efficient solvent systems for cellulose. Nevertheless, obtaining such information is not trivial. Recently, polarization transfer solid-state NMR (PTssNMR) was shown to be a very promising technique regarding an efficient and robust characterization of the solution state of cellulose. In the present study, combining PTssNMR, microscopic techniques and X-ray diffraction, a set of alkaline aqueous systems are investigated. The addition of specific additives, such as urea or thiourea, to aqueous NaOH based systems as well as the use of an amphiphilic organic cation, is found to have pronounced effects on the... (More)
The understanding of the state of dissolution of cellulose in a certain solvent is a critical step forward in the development of new efficient solvent systems for cellulose. Nevertheless, obtaining such information is not trivial. Recently, polarization transfer solid-state NMR (PTssNMR) was shown to be a very promising technique regarding an efficient and robust characterization of the solution state of cellulose. In the present study, combining PTssNMR, microscopic techniques and X-ray diffraction, a set of alkaline aqueous systems are investigated. The addition of specific additives, such as urea or thiourea, to aqueous NaOH based systems as well as the use of an amphiphilic organic cation, is found to have pronounced effects on the dissolution efficiency of cellulose. Additionally, the characteristics of the regenerated material are strongly dependent on the dissolution system; typically less crystalline materials, presenting smoother morphologies, are obtained when amphiphilic solvents or additives are used. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Amphiphilicity, Chain packing, PTssNMR, NaOH, TBAH
in
Cellulose
volume
23
issue
1
pages
247 - 258
publisher
Springer
external identifiers
  • wos:000368802700014
  • scopus:84955678486
ISSN
0969-0239
DOI
10.1007/s10570-015-0809-6
language
English
LU publication?
yes
id
148de532-6dc5-4bdc-8152-6a53aecd37a5 (old id 8728602)
date added to LUP
2016-02-26 11:24:50
date last changed
2017-10-01 04:04:34
@article{148de532-6dc5-4bdc-8152-6a53aecd37a5,
  abstract     = {The understanding of the state of dissolution of cellulose in a certain solvent is a critical step forward in the development of new efficient solvent systems for cellulose. Nevertheless, obtaining such information is not trivial. Recently, polarization transfer solid-state NMR (PTssNMR) was shown to be a very promising technique regarding an efficient and robust characterization of the solution state of cellulose. In the present study, combining PTssNMR, microscopic techniques and X-ray diffraction, a set of alkaline aqueous systems are investigated. The addition of specific additives, such as urea or thiourea, to aqueous NaOH based systems as well as the use of an amphiphilic organic cation, is found to have pronounced effects on the dissolution efficiency of cellulose. Additionally, the characteristics of the regenerated material are strongly dependent on the dissolution system; typically less crystalline materials, presenting smoother morphologies, are obtained when amphiphilic solvents or additives are used.},
  author       = {Alves, Luis and Medronho, Bruno and Antunes, Filipe E. and Topgaard, Daniel and Lindman, Bjorn},
  issn         = {0969-0239},
  keyword      = {Amphiphilicity,Chain packing,PTssNMR,NaOH,TBAH},
  language     = {eng},
  number       = {1},
  pages        = {247--258},
  publisher    = {Springer},
  series       = {Cellulose},
  title        = {Dissolution state of cellulose in aqueous systems. 1. Alkaline solvents},
  url          = {http://dx.doi.org/10.1007/s10570-015-0809-6},
  volume       = {23},
  year         = {2016},
}