Spontaneous vesicle formation in a block copolymer system
Bryskhe, Karin LU ; Jansson, Jörgen LU ; Topgaard, Daniel LU ; Schillén, Karin LU
and Olsson, Ulf
LU
(2004)
In The Journal of Physical Chemistry Part B
108(28).
p.9710-9719
- Abstract
- We have investigated the formation of vesicles in the binary system of a triblock copolymer of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) with the average composition EO5PO68EO5 in water. Vesicles are formed when a solution of unimers is heated into a two-phase region where, at equilibrium, a concentrated lamellar phase coexists with a dilute solution of unimers. The vesicles were characterized by cryo-TEM, static and dynamic light scattering, and NMR experiments. The average vesicle radius is approximately 60 nm, with an exponential size distribution, and the concentration of vesicles depends strongly on the temperature. The vesicles remain stationary on the time scale of hours. A striking observation is that, on this time... (More)
- We have investigated the formation of vesicles in the binary system of a triblock copolymer of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) with the average composition EO5PO68EO5 in water. Vesicles are formed when a solution of unimers is heated into a two-phase region where, at equilibrium, a concentrated lamellar phase coexists with a dilute solution of unimers. The vesicles were characterized by cryo-TEM, static and dynamic light scattering, and NMR experiments. The average vesicle radius is approximately 60 nm, with an exponential size distribution, and the concentration of vesicles depends strongly on the temperature. The vesicles remain stationary on the time scale of hours. A striking observation is that, on this time scale, both the vesicle size distribution and the concentration of vesicles are reversible with respect to temperature cycles. However, on the time scale of weeks a sedimentation is observed in the solutions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/153994
- author
- Bryskhe, Karin
LU
; Jansson, Jörgen
LU
; Topgaard, Daniel
LU
; Schillén, Karin
LU
and Olsson, Ulf
LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part B
- volume
- 108
- issue
- 28
- pages
- 9710 - 9719
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000222639900026
- scopus:3442887370
- ISSN
- 1520-5207
- DOI
- 10.1021/jp031313u
- language
- English
- LU publication?
- yes
- id
- 2dd4ae19-8c5b-4133-9cfa-a43b78a46618 (old id 153994)
- date added to LUP
- 2016-04-01 15:42:52
- date last changed
- 2022-01-28 06:43:57
@article{2dd4ae19-8c5b-4133-9cfa-a43b78a46618,
abstract = {{We have investigated the formation of vesicles in the binary system of a triblock copolymer of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) with the average composition EO5PO68EO5 in water. Vesicles are formed when a solution of unimers is heated into a two-phase region where, at equilibrium, a concentrated lamellar phase coexists with a dilute solution of unimers. The vesicles were characterized by cryo-TEM, static and dynamic light scattering, and NMR experiments. The average vesicle radius is approximately 60 nm, with an exponential size distribution, and the concentration of vesicles depends strongly on the temperature. The vesicles remain stationary on the time scale of hours. A striking observation is that, on this time scale, both the vesicle size distribution and the concentration of vesicles are reversible with respect to temperature cycles. However, on the time scale of weeks a sedimentation is observed in the solutions.}},
author = {{Bryskhe, Karin and Jansson, Jörgen and Topgaard, Daniel and Schillén, Karin and Olsson, Ulf}},
issn = {{1520-5207}},
language = {{eng}},
number = {{28}},
pages = {{9710--9719}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Part B}},
title = {{Spontaneous vesicle formation in a block copolymer system}},
url = {{http://dx.doi.org/10.1021/jp031313u}},
doi = {{10.1021/jp031313u}},
volume = {{108}},
year = {{2004}},
}