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Diffusion in an inhomogeneous system: NMR studies of diffusion in highly concentrated emulsions

Malmborg, Carin LU ; Topgaard, Daniel LU and Söderman, Olle LU (2003) In Journal of Colloid and Interface Science 263(1). p.270-276
Abstract
In this study the self-diffusion of different species in highly concentrated water-in-oil emulsions was investigated by means of the NMR diffusometry approach. The emulsions contained 96% aqueous solutions of salt or other additives; hept

ne was used as the oil phase. The surfactants, used to stabilize the emulsion, were soybean phosphatidylcholine and C12EO4. The water drops were about 1.5 mum in diameter according to diffusion measurements performed on water. Diffusion of tetramethyl ammonium ions and glucose between the emulsion droplets was found to be negligible on the relevant time-scale (<1 s). On the contrary, acetic acid/acetate ions diffused between the droplets and had exchange times which were a function of pH. (C)... (More)
In this study the self-diffusion of different species in highly concentrated water-in-oil emulsions was investigated by means of the NMR diffusometry approach. The emulsions contained 96% aqueous solutions of salt or other additives; hept

ne was used as the oil phase. The surfactants, used to stabilize the emulsion, were soybean phosphatidylcholine and C12EO4. The water drops were about 1.5 mum in diameter according to diffusion measurements performed on water. Diffusion of tetramethyl ammonium ions and glucose between the emulsion droplets was found to be negligible on the relevant time-scale (<1 s). On the contrary, acetic acid/acetate ions diffused between the droplets and had exchange times which were a function of pH. (C) 2003 Elsevier Science (USA). All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Diffusometry, Self-diffusion, Highly concentrated emulsion
in
Journal of Colloid and Interface Science
volume
263
issue
1
pages
270 - 276
publisher
Elsevier
external identifiers
  • wos:000183659700036
  • pmid:12804912
  • scopus:0037834534
ISSN
1095-7103
DOI
10.1016/S0021-9797(03)00259-5
language
English
LU publication?
yes
id
ff5e1db9-0b0f-4c58-a214-0ee97b7ff7f2 (old id 122092)
date added to LUP
2007-07-11 16:12:27
date last changed
2018-10-03 10:32:54
@article{ff5e1db9-0b0f-4c58-a214-0ee97b7ff7f2,
  abstract     = {In this study the self-diffusion of different species in highly concentrated water-in-oil emulsions was investigated by means of the NMR diffusometry approach. The emulsions contained 96% aqueous solutions of salt or other additives; hept<br/><br>
ne was used as the oil phase. The surfactants, used to stabilize the emulsion, were soybean phosphatidylcholine and C12EO4. The water drops were about 1.5 mum in diameter according to diffusion measurements performed on water. Diffusion of tetramethyl ammonium ions and glucose between the emulsion droplets was found to be negligible on the relevant time-scale (&lt;1 s). On the contrary, acetic acid/acetate ions diffused between the droplets and had exchange times which were a function of pH. (C) 2003 Elsevier Science (USA). All rights reserved.},
  author       = {Malmborg, Carin and Topgaard, Daniel and Söderman, Olle},
  issn         = {1095-7103},
  keyword      = {Diffusometry,Self-diffusion,Highly concentrated emulsion},
  language     = {eng},
  number       = {1},
  pages        = {270--276},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {Diffusion in an inhomogeneous system: NMR studies of diffusion in highly concentrated emulsions},
  url          = {http://dx.doi.org/10.1016/S0021-9797(03)00259-5},
  volume       = {263},
  year         = {2003},
}