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Biocompatible lecithin organogels: Structure and phase equilibria

Angelico, R; Ceglie, A; Colafemmina, G; Lopez, F; Murgia, S; Olsson, Ulf LU and Palazzo, G (2005) In Langmuir 21(1). p.140-148
Abstract
The microstructure of organogels formed upon the addition of tiny amounts of water to a solution of lecithin in fatty acid esters (viz. isopropylpalmitate and ethyloleate) was investigated by means of molecular self-diffusion measurements. In both systems lecithin and water form disconnected cylindrical reverse micelles. The ternary phase map for the lecithin/water/isopropylpalmitate has been investigated in detail. The organogel exists in a narrow region close to the lecithin-oil binary axis; for higher water content equilibrium between lamellae and reverse micelles is found. Lamellar phase occupies the lecithin-rich region, close to the lecithin corner (with the exception of a small island of hexagonal phase) and coexists with neat water... (More)
The microstructure of organogels formed upon the addition of tiny amounts of water to a solution of lecithin in fatty acid esters (viz. isopropylpalmitate and ethyloleate) was investigated by means of molecular self-diffusion measurements. In both systems lecithin and water form disconnected cylindrical reverse micelles. The ternary phase map for the lecithin/water/isopropylpalmitate has been investigated in detail. The organogel exists in a narrow region close to the lecithin-oil binary axis; for higher water content equilibrium between lamellae and reverse micelles is found. Lamellar phase occupies the lecithin-rich region, close to the lecithin corner (with the exception of a small island of hexagonal phase) and coexists with neat water close to the water-lecithin axis. The remaining part of the phase map shows the three-phase coexistence of water, oil, and lamellar phase. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
21
issue
1
pages
140 - 148
publisher
The American Chemical Society
external identifiers
  • wos:000226232700020
  • pmid:15620295
  • scopus:12144255194
ISSN
0743-7463
DOI
10.1021/la047974f
language
English
LU publication?
yes
id
38228837-e699-4195-9851-ac931cc99a77 (old id 157164)
date added to LUP
2007-07-10 16:24:21
date last changed
2017-01-01 04:42:16
@article{38228837-e699-4195-9851-ac931cc99a77,
  abstract     = {The microstructure of organogels formed upon the addition of tiny amounts of water to a solution of lecithin in fatty acid esters (viz. isopropylpalmitate and ethyloleate) was investigated by means of molecular self-diffusion measurements. In both systems lecithin and water form disconnected cylindrical reverse micelles. The ternary phase map for the lecithin/water/isopropylpalmitate has been investigated in detail. The organogel exists in a narrow region close to the lecithin-oil binary axis; for higher water content equilibrium between lamellae and reverse micelles is found. Lamellar phase occupies the lecithin-rich region, close to the lecithin corner (with the exception of a small island of hexagonal phase) and coexists with neat water close to the water-lecithin axis. The remaining part of the phase map shows the three-phase coexistence of water, oil, and lamellar phase.},
  author       = {Angelico, R and Ceglie, A and Colafemmina, G and Lopez, F and Murgia, S and Olsson, Ulf and Palazzo, G},
  issn         = {0743-7463},
  language     = {eng},
  number       = {1},
  pages        = {140--148},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Biocompatible lecithin organogels: Structure and phase equilibria},
  url          = {http://dx.doi.org/10.1021/la047974f},
  volume       = {21},
  year         = {2005},
}