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Self-diffusion study of micelles in poly(oxyethylene)-polydimethylsiloxane diblock copolymer and poly(oxyethylene) alkyl ether systems

Aramaki, Kenji and Olsson, Ulf LU (2006) In Journal of Colloid and Interface Science 300(1). p.354-360
Abstract
Self-diffusion constants of amphiphilic molecules in D2O solutions of mixed poly(oxyethylene)-polydimethylsiloxane diblock copolymer (POE-PDMS, SimC3EOn) and poly(oxyethylene) dodecyl ether (C12EOn) were measured by pulsed-field-gradient NMR method. In the D2O/Si25C3EO51.6/C12EO8 or D2O/Si52C3EO51.6/Cl2EO8 systems, small and large micelles coexist in a wide range of SimC3EO51.6 fraction in total amphiphiles, whereas such a coexisting phenomenon does not take place in the D2O/Si5.8C3EO51.6/Cl2EO8 system. The coexisting phenomenon also takes place in the D2O/Si25C3EO51.6/Cl2EO5 system although the range of mixing fraction is limited. By obtaining each contribution of surfactant and copolymer molecules to the attenuation decay of the echo... (More)
Self-diffusion constants of amphiphilic molecules in D2O solutions of mixed poly(oxyethylene)-polydimethylsiloxane diblock copolymer (POE-PDMS, SimC3EOn) and poly(oxyethylene) dodecyl ether (C12EOn) were measured by pulsed-field-gradient NMR method. In the D2O/Si25C3EO51.6/C12EO8 or D2O/Si52C3EO51.6/Cl2EO8 systems, small and large micelles coexist in a wide range of SimC3EO51.6 fraction in total amphiphiles, whereas such a coexisting phenomenon does not take place in the D2O/Si5.8C3EO51.6/Cl2EO8 system. The coexisting phenomenon also takes place in the D2O/Si25C3EO51.6/Cl2EO5 system although the range of mixing fraction is limited. By obtaining each contribution of surfactant and copolymer molecules to the attenuation decay of the echo signal from the proton of the poly(oxyethylene) chain, we could evaluate the composition of the mixed micelles in the D2O/Si25C3EO51.6/Cl2EO8 system. The copolymer content in the mixed micelle increases proportionally to the copolymer mole fraction in the aqueous solution. From the series of self-diffusion measurements, we can conclude that the miscibility Of SimC3EOn and C12EOn in aqueous micelles becomes poor and the coexisting phenomenon takes place when the PDMS chain becomes much longer than the dodecyl chain of C12EOn or the POE chain of C12EOn becomes long. Furthermore it is also revealed that very few silicone copolymer molecules can be incorporated in small surfactant micelles. (c) 2006 Elsevier Inc. All rights reserved. (Less)
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organization
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Contribution to journal
publication status
published
subject
keywords
micelle composition, coexisting micelles, poly(oxyethylene) alkyl ether, POE-PDMS block copolymer, micelle, self-diffusion study
in
Journal of Colloid and Interface Science
volume
300
issue
1
pages
354 - 360
publisher
Elsevier
external identifiers
  • wos:000238877700047
  • scopus:33746978744
ISSN
1095-7103
DOI
10.1016/j.jcis.2006.03.082
language
English
LU publication?
yes
id
89dc12cc-af6a-414e-a290-53f3e5d022b9 (old id 404083)
date added to LUP
2016-04-01 12:26:09
date last changed
2020-02-26 03:17:16
@article{89dc12cc-af6a-414e-a290-53f3e5d022b9,
  abstract     = {Self-diffusion constants of amphiphilic molecules in D2O solutions of mixed poly(oxyethylene)-polydimethylsiloxane diblock copolymer (POE-PDMS, SimC3EOn) and poly(oxyethylene) dodecyl ether (C12EOn) were measured by pulsed-field-gradient NMR method. In the D2O/Si25C3EO51.6/C12EO8 or D2O/Si52C3EO51.6/Cl2EO8 systems, small and large micelles coexist in a wide range of SimC3EO51.6 fraction in total amphiphiles, whereas such a coexisting phenomenon does not take place in the D2O/Si5.8C3EO51.6/Cl2EO8 system. The coexisting phenomenon also takes place in the D2O/Si25C3EO51.6/Cl2EO5 system although the range of mixing fraction is limited. By obtaining each contribution of surfactant and copolymer molecules to the attenuation decay of the echo signal from the proton of the poly(oxyethylene) chain, we could evaluate the composition of the mixed micelles in the D2O/Si25C3EO51.6/Cl2EO8 system. The copolymer content in the mixed micelle increases proportionally to the copolymer mole fraction in the aqueous solution. From the series of self-diffusion measurements, we can conclude that the miscibility Of SimC3EOn and C12EOn in aqueous micelles becomes poor and the coexisting phenomenon takes place when the PDMS chain becomes much longer than the dodecyl chain of C12EOn or the POE chain of C12EOn becomes long. Furthermore it is also revealed that very few silicone copolymer molecules can be incorporated in small surfactant micelles. (c) 2006 Elsevier Inc. All rights reserved.},
  author       = {Aramaki, Kenji and Olsson, Ulf},
  issn         = {1095-7103},
  language     = {eng},
  number       = {1},
  pages        = {354--360},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {Self-diffusion study of micelles in poly(oxyethylene)-polydimethylsiloxane diblock copolymer and poly(oxyethylene) alkyl ether systems},
  url          = {http://dx.doi.org/10.1016/j.jcis.2006.03.082},
  doi          = {10.1016/j.jcis.2006.03.082},
  volume       = {300},
  year         = {2006},
}