Vesicle formation from temperature jumps in a nonionic surfactant system
(2005) In The Journal of Physical Chemistry Part B 109(19). p.9265-9274- Abstract
- When heating a dilute sample of the binary system of tetraethyleneglycol dodecyl ether (C12E4) and water from the micellar phase (L-1) into the two-phase region of a lamellar phase (L-alpha) and excess water (W) vesicles are formed. During heating, one passes a region of phase separation in the micellar phase (L-1' + L-1") where the initial micelles rapidly fuse into larger aggregates forming the concentrated L-1 phase (L-1") with a structure of branched cylindrical micelles, a so-called "living network". The static correlation length of the micelles are increasing with increasing concentration, from ca. 10 nm to 80 nm in the concentration range of 0.0001 g/cm(3)-0.0035 g/cm(3). The overlap concentration was determined to 0.0035 g/cm(3).... (More)
- When heating a dilute sample of the binary system of tetraethyleneglycol dodecyl ether (C12E4) and water from the micellar phase (L-1) into the two-phase region of a lamellar phase (L-alpha) and excess water (W) vesicles are formed. During heating, one passes a region of phase separation in the micellar phase (L-1' + L-1") where the initial micelles rapidly fuse into larger aggregates forming the concentrated L-1 phase (L-1") with a structure of branched cylindrical micelles, a so-called "living network". The static correlation length of the micelles are increasing with increasing concentration, from ca. 10 nm to 80 nm in the concentration range of 0.0001 g/cm(3)-0.0035 g/cm(3). The overlap concentration was determined to 0.0035 g/cm(3). When the temperature reaches the L-1' + L-alpha region the network particles transform into bilayer vesicles with a z-average apparent hydrodynamic radius in the order of 200 nm depending on the composition. The size of the final vesicles depends on the extent of aggregation/fusion in the L-1' + L-1" region and hence on the rate of heating. The aggregation/fusion in the L-1' + L-1" is slower than diffusion-limited aggregation, and it is shown that 1/100 of the collisions are sticky results in the fusion event. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157223
- author
- Bryskhe, Karin LU ; Bulut, Sanja LU and Olsson, Ulf LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part B
- volume
- 109
- issue
- 19
- pages
- 9265 - 9274
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000229134000012
- scopus:19844374258
- ISSN
- 1520-5207
- DOI
- 10.1021/jp045244a
- language
- English
- LU publication?
- yes
- id
- b23bd84e-7076-4e1d-97f6-070c7c1f9b28 (old id 157223)
- date added to LUP
- 2016-04-01 16:36:07
- date last changed
- 2022-01-28 20:50:26
@article{b23bd84e-7076-4e1d-97f6-070c7c1f9b28,
abstract = {{When heating a dilute sample of the binary system of tetraethyleneglycol dodecyl ether (C12E4) and water from the micellar phase (L-1) into the two-phase region of a lamellar phase (L-alpha) and excess water (W) vesicles are formed. During heating, one passes a region of phase separation in the micellar phase (L-1' + L-1") where the initial micelles rapidly fuse into larger aggregates forming the concentrated L-1 phase (L-1") with a structure of branched cylindrical micelles, a so-called "living network". The static correlation length of the micelles are increasing with increasing concentration, from ca. 10 nm to 80 nm in the concentration range of 0.0001 g/cm(3)-0.0035 g/cm(3). The overlap concentration was determined to 0.0035 g/cm(3). When the temperature reaches the L-1' + L-alpha region the network particles transform into bilayer vesicles with a z-average apparent hydrodynamic radius in the order of 200 nm depending on the composition. The size of the final vesicles depends on the extent of aggregation/fusion in the L-1' + L-1" region and hence on the rate of heating. The aggregation/fusion in the L-1' + L-1" is slower than diffusion-limited aggregation, and it is shown that 1/100 of the collisions are sticky results in the fusion event.}},
author = {{Bryskhe, Karin and Bulut, Sanja and Olsson, Ulf}},
issn = {{1520-5207}},
language = {{eng}},
number = {{19}},
pages = {{9265--9274}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Part B}},
title = {{Vesicle formation from temperature jumps in a nonionic surfactant system}},
url = {{http://dx.doi.org/10.1021/jp045244a}},
doi = {{10.1021/jp045244a}},
volume = {{109}},
year = {{2005}},
}