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Phase behavior of the monoolein-water system - The effects of addition of the hydrocarbon 1,8-cineole and supercritical carbon dioxide

da Cruz Francisco, José LU ; Topgaard, Daniel LU ; Sivik, Björn LU and Bergenståhl, Björn LU (2004) In Journal of Supercritical Fluids 31(3). p.263-271
Abstract
The results of a study on the phase behavior of the monoolein/water system with the addition of the hydrocarbon 1,8-cineole (C10H18O) and supercritical carbon dioxide at 15 MPa is presented. To two mixtures consisting of 9 and 18 wt.% water in monoolein, 5, 10, and 20 wt.% cineole were added and heated to between 35 and 80 degreesC at atmospheric pressure and in the presence of supercritical carbon dioxide. The phase changes were followed by deuterium nuclear magnetic resonance (H-2 NMR), light microscopy, and ocular inspection. The mesomorphic structures developed in the 9 wt.% water sample suffered little change due to the presence of the supercritical carbon dioxide. However, in the mixture with 18 wt.% water, the native phase... (More)
The results of a study on the phase behavior of the monoolein/water system with the addition of the hydrocarbon 1,8-cineole (C10H18O) and supercritical carbon dioxide at 15 MPa is presented. To two mixtures consisting of 9 and 18 wt.% water in monoolein, 5, 10, and 20 wt.% cineole were added and heated to between 35 and 80 degreesC at atmospheric pressure and in the presence of supercritical carbon dioxide. The phase changes were followed by deuterium nuclear magnetic resonance (H-2 NMR), light microscopy, and ocular inspection. The mesomorphic structures developed in the 9 wt.% water sample suffered little change due to the presence of the supercritical carbon dioxide. However, in the mixture with 18 wt.% water, the native phase structures were dramatically affected and an isotropic fluid phase developed. The addition of cineole has lowered the LC-L-alpha --> LC-H-Pi phase transition in the samples with 9 and 18 wt.% water in monoolein. The surplus of supercritical carbon dioxide in the samples has resulted in similar developments. Regardless of the amount of cineole present in the system, only the isotropic fluid phase was observed in the samples with 18 wt.% water in monoolein. (C) 2004 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Monoolein, Supercritical CO2, Extraction, NMR, Cineole, Phase behavior, Hydrocarbon
in
Journal of Supercritical Fluids
volume
31
issue
3
pages
263 - 271
publisher
Elsevier
external identifiers
  • wos:000225200200004
  • scopus:5444266169
ISSN
0896-8446
DOI
10.1016/j.supflu.2003.11.008
language
English
LU publication?
yes
id
32a2e0f3-ce2b-4366-9d44-8858ad875b0b (old id 139291)
date added to LUP
2007-07-11 11:59:20
date last changed
2017-01-01 04:42:41
@article{32a2e0f3-ce2b-4366-9d44-8858ad875b0b,
  abstract     = {The results of a study on the phase behavior of the monoolein/water system with the addition of the hydrocarbon 1,8-cineole (C10H18O) and supercritical carbon dioxide at 15 MPa is presented. To two mixtures consisting of 9 and 18 wt.% water in monoolein, 5, 10, and 20 wt.% cineole were added and heated to between 35 and 80 degreesC at atmospheric pressure and in the presence of supercritical carbon dioxide. The phase changes were followed by deuterium nuclear magnetic resonance (H-2 NMR), light microscopy, and ocular inspection. The mesomorphic structures developed in the 9 wt.% water sample suffered little change due to the presence of the supercritical carbon dioxide. However, in the mixture with 18 wt.% water, the native phase structures were dramatically affected and an isotropic fluid phase developed. The addition of cineole has lowered the LC-L-alpha --> LC-H-Pi phase transition in the samples with 9 and 18 wt.% water in monoolein. The surplus of supercritical carbon dioxide in the samples has resulted in similar developments. Regardless of the amount of cineole present in the system, only the isotropic fluid phase was observed in the samples with 18 wt.% water in monoolein. (C) 2004 Elsevier B.V. All rights reserved.},
  author       = {da Cruz Francisco, José and Topgaard, Daniel and Sivik, Björn and Bergenståhl, Björn},
  issn         = {0896-8446},
  keyword      = {Monoolein,Supercritical CO2,Extraction,NMR,Cineole,Phase behavior,Hydrocarbon},
  language     = {eng},
  number       = {3},
  pages        = {263--271},
  publisher    = {Elsevier},
  series       = {Journal of Supercritical Fluids},
  title        = {Phase behavior of the monoolein-water system - The effects of addition of the hydrocarbon 1,8-cineole and supercritical carbon dioxide},
  url          = {http://dx.doi.org/10.1016/j.supflu.2003.11.008},
  volume       = {31},
  year         = {2004},
}