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The effect of polymers on the phase behavior of balanced microemulsions: diblock-copolymer and comb-polymers

Nilsson, Markus LU ; Söderman, Olle LU and Johansson, Ingegard (2006) In Colloid and Polymer Science 284(11). p.1229-1241
Abstract
The effect of some amphipilic diblock-copolymers and comb-polymers on a balanced Winsor III microemulsion system is investigated with the quaternary system n-octyl-beta-D-glucoside/1-octanol/n-octane/D2O as basis system. The diblock-copolymers are polyethyleneoxide-co-polydodecenoxide (PEOx PEDODOy ) and polyethyleneoxide-co-polybutyleneoxide (PEO (x) PEBU (y) ), constituted of a straight chain hydrophilic part and a bulky hydrophobic part. Addition of the diblock-copolymer leads to an enhancement of the swelling of the middle phase by uptake of water and oil; a maximum boosting factor of 6 was obtained for PEO111PEDODO25. Nuclear magnetic resonance diffusometry yields the self-diffusion coefficients of all the components in the system.... (More)
The effect of some amphipilic diblock-copolymers and comb-polymers on a balanced Winsor III microemulsion system is investigated with the quaternary system n-octyl-beta-D-glucoside/1-octanol/n-octane/D2O as basis system. The diblock-copolymers are polyethyleneoxide-co-polydodecenoxide (PEOx PEDODOy ) and polyethyleneoxide-co-polybutyleneoxide (PEO (x) PEBU (y) ), constituted of a straight chain hydrophilic part and a bulky hydrophobic part. Addition of the diblock-copolymer leads to an enhancement of the swelling of the middle phase by uptake of water and oil; a maximum boosting factor of 6 was obtained for PEO111PEDODO25. Nuclear magnetic resonance diffusometry yields the self-diffusion coefficients of all the components in the system. The diffusion experiments provide information on how the microstructure of the bicontinuous microemulsion changes upon addition of the polymers. The reduced self-diffusion coefficients of water and oil are sensitive to the type of polymer that is incorporated in the film. For the diblock-copolymers, as mainly used here, the reduced self-diffusion coefficient of oil and water will respond to how the polymer bends the film. When the film bends away from water, the reduced self-diffusion of the water will increase, whereas the oil diffusion will decrease due to the film acting as a barrier, hindering free diffusion. The self-diffusion coefficient of the polymer and surfactant are similar in magnitude and both decrease slightly with increasing polymer concentration. (Less)
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author
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organization
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type
Contribution to journal
publication status
published
subject
keywords
H-1 self-diffusion NMR, efficiency boosting, diblock-copolymer, bicontinuous microemulsion, swelling of microemulsion
in
Colloid and Polymer Science
volume
284
issue
11
pages
1229 - 1241
publisher
Springer
external identifiers
  • wos:000240256200005
  • scopus:33748195951
ISSN
0303-402X
DOI
10.1007/s00396-006-1469-8
language
English
LU publication?
yes
id
151b3336-c5d4-4a94-bb04-ceac2484e767 (old id 394798)
date added to LUP
2016-04-01 12:25:39
date last changed
2020-01-12 09:48:54
@article{151b3336-c5d4-4a94-bb04-ceac2484e767,
  abstract     = {The effect of some amphipilic diblock-copolymers and comb-polymers on a balanced Winsor III microemulsion system is investigated with the quaternary system n-octyl-beta-D-glucoside/1-octanol/n-octane/D2O as basis system. The diblock-copolymers are polyethyleneoxide-co-polydodecenoxide (PEOx PEDODOy ) and polyethyleneoxide-co-polybutyleneoxide (PEO (x) PEBU (y) ), constituted of a straight chain hydrophilic part and a bulky hydrophobic part. Addition of the diblock-copolymer leads to an enhancement of the swelling of the middle phase by uptake of water and oil; a maximum boosting factor of 6 was obtained for PEO111PEDODO25. Nuclear magnetic resonance diffusometry yields the self-diffusion coefficients of all the components in the system. The diffusion experiments provide information on how the microstructure of the bicontinuous microemulsion changes upon addition of the polymers. The reduced self-diffusion coefficients of water and oil are sensitive to the type of polymer that is incorporated in the film. For the diblock-copolymers, as mainly used here, the reduced self-diffusion coefficient of oil and water will respond to how the polymer bends the film. When the film bends away from water, the reduced self-diffusion of the water will increase, whereas the oil diffusion will decrease due to the film acting as a barrier, hindering free diffusion. The self-diffusion coefficient of the polymer and surfactant are similar in magnitude and both decrease slightly with increasing polymer concentration.},
  author       = {Nilsson, Markus and Söderman, Olle and Johansson, Ingegard},
  issn         = {0303-402X},
  language     = {eng},
  number       = {11},
  pages        = {1229--1241},
  publisher    = {Springer},
  series       = {Colloid and Polymer Science},
  title        = {The effect of polymers on the phase behavior of balanced microemulsions: diblock-copolymer and comb-polymers},
  url          = {http://dx.doi.org/10.1007/s00396-006-1469-8},
  doi          = {10.1007/s00396-006-1469-8},
  volume       = {284},
  year         = {2006},
}