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General patterns of the phase behavior of mixtures of H2O, alkanes, alkyl glucosides, and cosurfactants

Sottmann, T; Kluge, K; Strey, R; Reimer, Johan LU and Söderman, Olle LU (2002) In Langmuir 18(8). p.3058-3067
Abstract
We demonstrate how rather hydrophilic surfactants can be used for solubilizing simultaneously water and alkane. The required hydrophilic-lipophilic balance can be achieved by the addition of a medium-chain alcohol, that is, a hydrophobic cosurfactant. Specifically, the phase behavior of the quaternary water-n-octane-n-octyl beta-glucopyranoside (C(8)G(1))-n-octanol (C8E0) system has been investigated. Sugar surfactants, in general, are hydrophilic and, because of the comparatively large number of hydroxyl groups, much less temperature-sensitive than the well-known alkylpolyglycolether (CiEj) surfactants. Therefore, one has to resort to tuning the phase behavior by mixing with a hydrophobic cosurfactant. Once this is done, the phase... (More)
We demonstrate how rather hydrophilic surfactants can be used for solubilizing simultaneously water and alkane. The required hydrophilic-lipophilic balance can be achieved by the addition of a medium-chain alcohol, that is, a hydrophobic cosurfactant. Specifically, the phase behavior of the quaternary water-n-octane-n-octyl beta-glucopyranoside (C(8)G(1))-n-octanol (C8E0) system has been investigated. Sugar surfactants, in general, are hydrophilic and, because of the comparatively large number of hydroxyl groups, much less temperature-sensitive than the well-known alkylpolyglycolether (CiEj) surfactants. Therefore, one has to resort to tuning the phase behavior by mixing with a hydrophobic cosurfactant. Once this is done, the phase behavior mimics that of water-alkane-CiEj microemulsions. To show this, the trajectory of the middle-phase is determined as the phase inversion is passed. A scaling of the trajectory onto the trajectories of conventional temperature-sensitive ternary microemulsions is possible after the composition (i.e. the fraction of n-octanol) of the mixed amphiphilic film is determined from phase behavior and density measurements. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
18
issue
8
pages
3058 - 3067
publisher
The American Chemical Society
external identifiers
  • wos:000174978000019
  • scopus:0037117929
ISSN
0743-7463
DOI
10.1021/la011665x
language
English
LU publication?
yes
id
985e563c-8fb8-47bf-acde-ca64102fb655 (old id 340208)
date added to LUP
2007-10-11 07:55:23
date last changed
2018-01-07 06:15:04
@article{985e563c-8fb8-47bf-acde-ca64102fb655,
  abstract     = {We demonstrate how rather hydrophilic surfactants can be used for solubilizing simultaneously water and alkane. The required hydrophilic-lipophilic balance can be achieved by the addition of a medium-chain alcohol, that is, a hydrophobic cosurfactant. Specifically, the phase behavior of the quaternary water-n-octane-n-octyl beta-glucopyranoside (C(8)G(1))-n-octanol (C8E0) system has been investigated. Sugar surfactants, in general, are hydrophilic and, because of the comparatively large number of hydroxyl groups, much less temperature-sensitive than the well-known alkylpolyglycolether (CiEj) surfactants. Therefore, one has to resort to tuning the phase behavior by mixing with a hydrophobic cosurfactant. Once this is done, the phase behavior mimics that of water-alkane-CiEj microemulsions. To show this, the trajectory of the middle-phase is determined as the phase inversion is passed. A scaling of the trajectory onto the trajectories of conventional temperature-sensitive ternary microemulsions is possible after the composition (i.e. the fraction of n-octanol) of the mixed amphiphilic film is determined from phase behavior and density measurements.},
  author       = {Sottmann, T and Kluge, K and Strey, R and Reimer, Johan and Söderman, Olle},
  issn         = {0743-7463},
  language     = {eng},
  number       = {8},
  pages        = {3058--3067},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {General patterns of the phase behavior of mixtures of H2O, alkanes, alkyl glucosides, and cosurfactants},
  url          = {http://dx.doi.org/10.1021/la011665x},
  volume       = {18},
  year         = {2002},
}