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Phase behavior of the system lecithin-water - 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.255-262
Abstract
The phase behavior of lecithin and water mixtures with addition of the hydrocarbon 1,8-cineole (C10H18O) was investigated using light microscopy and H-2 NMR at atmospheric pressure and with a surplus of supercritical carbon dioxide (15 MPa) between 35 and 80degreesC. The lecithin-water (LW) mixtures consisted of 10 and 20wt.% water in lecithin to which 5, 10, and 20wt.% cineole and supercritical carbon dioxide were added. The addition of cineole to the 10wt.% water in lecithin samples has affected the original lamellar liquid crystalline phase present and mainly transformed it into the reversed hexagonal phase at cineole concentration of 10wt.% and higher. This phase however Only Occurred when 20 wt.% cineole were added to the lecithin... (More)
The phase behavior of lecithin and water mixtures with addition of the hydrocarbon 1,8-cineole (C10H18O) was investigated using light microscopy and H-2 NMR at atmospheric pressure and with a surplus of supercritical carbon dioxide (15 MPa) between 35 and 80degreesC. The lecithin-water (LW) mixtures consisted of 10 and 20wt.% water in lecithin to which 5, 10, and 20wt.% cineole and supercritical carbon dioxide were added. The addition of cineole to the 10wt.% water in lecithin samples has affected the original lamellar liquid crystalline phase present and mainly transformed it into the reversed hexagonal phase at cineole concentration of 10wt.% and higher. This phase however Only Occurred when 20 wt.% cineole were added to the lecithin samples with 20wt.% water which otherwise was lamellar. The addition of supercritical carbon dioxide to the lecithin/water samples in the absence of cineole resulted in a liquid crystalline lamellar (LC-L-alpha) phase and was the same as in the original phase structure at atmospheric pressure. In the lecithin/water samples with cineole, the addition of supercritical carbon had little effect on the structure. (C) 2004 Elsevier B.V. All rights reserved. (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
Cineole, Phase behavior, Mesomorphic structure, Supercritical carbon dioxide, Lecithin
in
Journal of Supercritical Fluids
volume
31
issue
3
pages
255 - 262
publisher
Elsevier
external identifiers
  • wos:000225200200003
  • scopus:5144232250
ISSN
0896-8446
DOI
10.1016/j.supflu.2003.11.007
language
English
LU publication?
yes
id
1ed65d9e-2333-4171-8389-36430c4d0e95 (old id 139285)
date added to LUP
2007-07-11 11:57:53
date last changed
2017-01-01 04:31:39
@article{1ed65d9e-2333-4171-8389-36430c4d0e95,
  abstract     = {The phase behavior of lecithin and water mixtures with addition of the hydrocarbon 1,8-cineole (C10H18O) was investigated using light microscopy and H-2 NMR at atmospheric pressure and with a surplus of supercritical carbon dioxide (15 MPa) between 35 and 80degreesC. The lecithin-water (LW) mixtures consisted of 10 and 20wt.% water in lecithin to which 5, 10, and 20wt.% cineole and supercritical carbon dioxide were added. The addition of cineole to the 10wt.% water in lecithin samples has affected the original lamellar liquid crystalline phase present and mainly transformed it into the reversed hexagonal phase at cineole concentration of 10wt.% and higher. This phase however Only Occurred when 20 wt.% cineole were added to the lecithin samples with 20wt.% water which otherwise was lamellar. The addition of supercritical carbon dioxide to the lecithin/water samples in the absence of cineole resulted in a liquid crystalline lamellar (LC-L-alpha) phase and was the same as in the original phase structure at atmospheric pressure. In the lecithin/water samples with cineole, the addition of supercritical carbon had little effect on the structure. (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      = {Cineole,Phase behavior,Mesomorphic structure,Supercritical carbon dioxide,Lecithin},
  language     = {eng},
  number       = {3},
  pages        = {255--262},
  publisher    = {Elsevier},
  series       = {Journal of Supercritical Fluids},
  title        = {Phase behavior of the system lecithin-water - The effects of addition of the hydrocarbon 1,8-cineole and supercritical carbon dioxide},
  url          = {http://dx.doi.org/10.1016/j.supflu.2003.11.007},
  volume       = {31},
  year         = {2004},
}