Self-diffusion study of micelles in poly(oxyethylene)-polydimethylsiloxane diblock copolymer and poly(oxyethylene) alkyl ether systems
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/404083
- author
- Aramaki, Kenji and Olsson, Ulf LU
- organization
- publishing date
- 2006
- type
- 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
- 2022-03-05 23:32:59
@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}},
keywords = {{micelle composition; coexisting micelles; poly(oxyethylene) alkyl ether; POE-PDMS block copolymer; micelle; self-diffusion study}},
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}},
}