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On the role of hydrophobic interactions in cellulose dissolution and regeneration: Colloidal aggregates and molecular solutions

Alves, Luis; Medronho, Bruno F.; Antunes, Filipe E.; Romano, Anabela; Miguel, Maria G. and Lindman, Björn LU (2015) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 483. p.257-263
Abstract
The development of strategies for dissolution and regeneration of cellulose constitutes an increasingly active research field due to the direct relevance for many production processes and applications. A wide variety of suitable solvents for cellulose are already available. However, cellulose solvents are of highly different nature reflecting the great challenges in the understanding of the subtle balance between the different interactions. Here, we report on the effect of two different solvents on the dissolution of cellulose on multiple length scales and its consequences for the characteristics of the regenerated material. While an aqueous tetrabutylammonium hydroxide solution gives rise to what appears to be dissolution down to the... (More)
The development of strategies for dissolution and regeneration of cellulose constitutes an increasingly active research field due to the direct relevance for many production processes and applications. A wide variety of suitable solvents for cellulose are already available. However, cellulose solvents are of highly different nature reflecting the great challenges in the understanding of the subtle balance between the different interactions. Here, we report on the effect of two different solvents on the dissolution of cellulose on multiple length scales and its consequences for the characteristics of the regenerated material. While an aqueous tetrabutylammonium hydroxide solution gives rise to what appears to be dissolution down to the molecular level, a sodium hydroxide solution does not dissolve cellulose molecularly but rather leaves aggregates of high crystallinity stable in the cellulose dope. The dramatic difference between a small inorganic cation and an amphiphilic cation indicates a critical role of hydrophobic interactions between cellulose molecules and provides support for the picture that cellulose molecules have pronounced amphiphilic properties. (C) 2015 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cellulose, Dissolution, Crystallinity, Regeneration, Hydrophobic, interactions, Tetrabutylammonium hydroxide
in
Colloids and Surfaces A: Physicochemical and Engineering Aspects
volume
483
pages
257 - 263
publisher
Elsevier
external identifiers
  • wos:000362146200034
  • scopus:84941744152
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2015.03.011
language
English
LU publication?
yes
id
43360280-1a59-4015-a54e-1cf7b9e0bbdd (old id 8221173)
date added to LUP
2015-11-30 13:26:28
date last changed
2017-09-17 06:29:47
@article{43360280-1a59-4015-a54e-1cf7b9e0bbdd,
  abstract     = {The development of strategies for dissolution and regeneration of cellulose constitutes an increasingly active research field due to the direct relevance for many production processes and applications. A wide variety of suitable solvents for cellulose are already available. However, cellulose solvents are of highly different nature reflecting the great challenges in the understanding of the subtle balance between the different interactions. Here, we report on the effect of two different solvents on the dissolution of cellulose on multiple length scales and its consequences for the characteristics of the regenerated material. While an aqueous tetrabutylammonium hydroxide solution gives rise to what appears to be dissolution down to the molecular level, a sodium hydroxide solution does not dissolve cellulose molecularly but rather leaves aggregates of high crystallinity stable in the cellulose dope. The dramatic difference between a small inorganic cation and an amphiphilic cation indicates a critical role of hydrophobic interactions between cellulose molecules and provides support for the picture that cellulose molecules have pronounced amphiphilic properties. (C) 2015 Elsevier B.V. All rights reserved.},
  author       = {Alves, Luis and Medronho, Bruno F. and Antunes, Filipe E. and Romano, Anabela and Miguel, Maria G. and Lindman, Björn},
  issn         = {0927-7757},
  keyword      = {Cellulose,Dissolution,Crystallinity,Regeneration,Hydrophobic,interactions,Tetrabutylammonium hydroxide},
  language     = {eng},
  pages        = {257--263},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
  title        = {On the role of hydrophobic interactions in cellulose dissolution and regeneration: Colloidal aggregates and molecular solutions},
  url          = {http://dx.doi.org/10.1016/j.colsurfa.2015.03.011},
  volume       = {483},
  year         = {2015},
}