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Water-Diesel Microemulsions Stabilized by an Anionic Extended Surfactant and a Cationic Hydrotrope

Kayali, Ibrahim; Qamhieh, Khawla; Olsson, Ulf LU ; Bemert, Lada and Strey, Reinhard (2012) In Journal of Dispersion Science and Technology 33(4). p.516-520
Abstract
Alcohol-free microemulsions were formulated using mixtures of extended surfactant (C12-14-PO14-EO2SO4Na), sodium dodecyl benzene sulfonic acid and cationic hydrotropes with equal amounts of water and diesel. The cationic hydrotropes had short hydrocarbon or propylene oxide chain. The formulation included sodium carbonate to convert naphthenic acids in diesel to soaps. The phase behavior at ambient temperature of oil-free mixtures as a function of NaCl concentration was investigated. Visual inspection as well as cross polarizers were used to detect anisotropy. The microemulsion fish phase diagram and solubilization ratios for diesel and brine in the middle phases were determined. The minimum surfactant concentration needed to initiate... (More)
Alcohol-free microemulsions were formulated using mixtures of extended surfactant (C12-14-PO14-EO2SO4Na), sodium dodecyl benzene sulfonic acid and cationic hydrotropes with equal amounts of water and diesel. The cationic hydrotropes had short hydrocarbon or propylene oxide chain. The formulation included sodium carbonate to convert naphthenic acids in diesel to soaps. The phase behavior at ambient temperature of oil-free mixtures as a function of NaCl concentration was investigated. Visual inspection as well as cross polarizers were used to detect anisotropy. The microemulsion fish phase diagram and solubilization ratios for diesel and brine in the middle phases were determined. The minimum surfactant concentration needed to initiate middle phase formation was 0.10 wt%. Salinity scans revealed that optimal salinity can be adjusted according to the hydrophilic/lipophilic nature of the hydrotrope used. Interfacial tension measurements using a spinning drop tensiometer showed a minimum value of 0.0015 mN/m between middle phase microemulsion and excess brine and a value of 0.032 mN/m between diesel and brine. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cationic and anionic surfactants, extended surfactant, middle phase, microemulsions, ultra low interfacial tension
in
Journal of Dispersion Science and Technology
volume
33
issue
4
pages
516 - 520
publisher
Taylor & Francis
external identifiers
  • wos:000303571500008
  • scopus:84859643009
ISSN
0193-2691
DOI
10.1080/01932691.2011.574924
language
English
LU publication?
yes
id
450931c9-20b0-4ed4-be11-35bd7ef22f3f (old id 2562896)
date added to LUP
2012-06-01 12:25:55
date last changed
2017-01-01 06:33:48
@article{450931c9-20b0-4ed4-be11-35bd7ef22f3f,
  abstract     = {Alcohol-free microemulsions were formulated using mixtures of extended surfactant (C12-14-PO14-EO2SO4Na), sodium dodecyl benzene sulfonic acid and cationic hydrotropes with equal amounts of water and diesel. The cationic hydrotropes had short hydrocarbon or propylene oxide chain. The formulation included sodium carbonate to convert naphthenic acids in diesel to soaps. The phase behavior at ambient temperature of oil-free mixtures as a function of NaCl concentration was investigated. Visual inspection as well as cross polarizers were used to detect anisotropy. The microemulsion fish phase diagram and solubilization ratios for diesel and brine in the middle phases were determined. The minimum surfactant concentration needed to initiate middle phase formation was 0.10 wt%. Salinity scans revealed that optimal salinity can be adjusted according to the hydrophilic/lipophilic nature of the hydrotrope used. Interfacial tension measurements using a spinning drop tensiometer showed a minimum value of 0.0015 mN/m between middle phase microemulsion and excess brine and a value of 0.032 mN/m between diesel and brine.},
  author       = {Kayali, Ibrahim and Qamhieh, Khawla and Olsson, Ulf and Bemert, Lada and Strey, Reinhard},
  issn         = {0193-2691},
  keyword      = {Cationic and anionic surfactants,extended surfactant,middle phase,microemulsions,ultra low interfacial tension},
  language     = {eng},
  number       = {4},
  pages        = {516--520},
  publisher    = {Taylor & Francis},
  series       = {Journal of Dispersion Science and Technology},
  title        = {Water-Diesel Microemulsions Stabilized by an Anionic Extended Surfactant and a Cationic Hydrotrope},
  url          = {http://dx.doi.org/10.1080/01932691.2011.574924},
  volume       = {33},
  year         = {2012},
}