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Liquid crystalline properties and extractability of monoolein-water systems by supercritical carbon dioxide

Francisco, J D; Turner, C; Topgaard, Daniel LU ; Sivik, Björn LU and Bergenståhl, Björn LU (2003) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 213(1). p.69-78
Abstract
The influence of phase structure on the extraction recovery of monoolein from monoolein-water systems by supercritical carbon dioxide was investigated. Two monoolein-water mi

tures at concentrations of 9 wt% water and 18 wt% water, respectively, were studied. H-2-NMR was used to monitor changes of the phase structures in supercritical conditions. The results showed that the phase structure and the water-monoolein interactions play a role on the extraction yield. The monoolein recovery was higher in the 9 wt% water sample in which L-alpha phase was present compared to the 18 wt% water sample in which the L-alpha melted to yield a L-2 phase. When the phase structures were the same in both samples, the extraction recovery was... (More)
The influence of phase structure on the extraction recovery of monoolein from monoolein-water systems by supercritical carbon dioxide was investigated. Two monoolein-water mi

tures at concentrations of 9 wt% water and 18 wt% water, respectively, were studied. H-2-NMR was used to monitor changes of the phase structures in supercritical conditions. The results showed that the phase structure and the water-monoolein interactions play a role on the extraction yield. The monoolein recovery was higher in the 9 wt% water sample in which L-alpha phase was present compared to the 18 wt% water sample in which the L-alpha melted to yield a L-2 phase. When the phase structures were the same in both samples, the extraction recovery was determined by the solubility properties of the components of the system. The changes due to the presence of supercritical carbon dioxide were shown also to depend on the water concentration of the monoolein-water mixture besides the temperature. The 18 wt% mixture showed a L-2 phase structure in all the range of the temperature investigated while the 9 wt% water mixture showed phase changes from L-alpha phase to L-2 phase in the same temperature range. (C) 200

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Monoolein, Supercritical CO2, Extraction, NMR
in
Colloids and Surfaces A: Physicochemical and Engineering Aspects
volume
213
issue
1
pages
69 - 78
publisher
Elsevier
external identifiers
  • wos:000182771400008
  • scopus:0347295972
ISSN
0927-7757
DOI
10.1016/S0927-7757(02)00359-X
language
English
LU publication?
yes
id
772885d8-d453-4783-b4e1-b530c4bffc82 (old id 121996)
date added to LUP
2007-06-26 16:12:49
date last changed
2017-01-01 08:02:54
@article{772885d8-d453-4783-b4e1-b530c4bffc82,
  abstract     = {The influence of phase structure on the extraction recovery of monoolein from monoolein-water systems by supercritical carbon dioxide was investigated. Two monoolein-water mi<br/><br>
tures at concentrations of 9 wt% water and 18 wt% water, respectively, were studied. H-2-NMR was used to monitor changes of the phase structures in supercritical conditions. The results showed that the phase structure and the water-monoolein interactions play a role on the extraction yield. The monoolein recovery was higher in the 9 wt% water sample in which L-alpha phase was present compared to the 18 wt% water sample in which the L-alpha melted to yield a L-2 phase. When the phase structures were the same in both samples, the extraction recovery was determined by the solubility properties of the components of the system. The changes due to the presence of supercritical carbon dioxide were shown also to depend on the water concentration of the monoolein-water mixture besides the temperature. The 18 wt% mixture showed a L-2 phase structure in all the range of the temperature investigated while the 9 wt% water mixture showed phase changes from L-alpha phase to L-2 phase in the same temperature range. (C) 200<br/><br>
 Elsevier Science B.V. All rights reserved.},
  author       = {Francisco, J D and Turner, C and Topgaard, Daniel and Sivik, Björn and Bergenståhl, Björn},
  issn         = {0927-7757},
  keyword      = {Monoolein,Supercritical CO2,Extraction,NMR},
  language     = {eng},
  number       = {1},
  pages        = {69--78},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
  title        = {Liquid crystalline properties and extractability of monoolein-water systems by supercritical carbon dioxide},
  url          = {http://dx.doi.org/10.1016/S0927-7757(02)00359-X},
  volume       = {213},
  year         = {2003},
}