Emulsion Ripening through Molecular Exchange at Droplet Contacts.
(2015) In Angewandte Chemie (International edition) 54(5). p.1452-1455- Abstract
- Two coarsening mechanisms of emulsions are well established: droplet coalescence (fusion of two droplets) and Ostwald ripening (molecular exchange through the continuous phase). Here a third mechanism is identified, contact ripening, which operates through molecular exchange upon droplets collisions. A contrast manipulated small-angle neutron scattering experiment was performed to isolate contact ripening from coalescence and Ostwald ripening. A kinetic study was conducted, using dynamic light scattering and monodisperse nanoemulsions, to obtain the exchange key parameters. Decreasing the concentration or adding ionic repulsions between droplets hinders contact ripening by decreasing the collision frequency. Using long surfactant chains... (More)
- Two coarsening mechanisms of emulsions are well established: droplet coalescence (fusion of two droplets) and Ostwald ripening (molecular exchange through the continuous phase). Here a third mechanism is identified, contact ripening, which operates through molecular exchange upon droplets collisions. A contrast manipulated small-angle neutron scattering experiment was performed to isolate contact ripening from coalescence and Ostwald ripening. A kinetic study was conducted, using dynamic light scattering and monodisperse nanoemulsions, to obtain the exchange key parameters. Decreasing the concentration or adding ionic repulsions between droplets hinders contact ripening by decreasing the collision frequency. Using long surfactant chains and well-hydrated heads inhibits contact ripening by hindering fluctuations in the film. Contact ripening can be controlled by these parameters, which is essential for both emulsion formulation and delivery of hydrophobic ingredients. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4908390
- author
- Roger, Kevin ; Olsson, Ulf LU ; Schweins, Ralf and Cabane, Bernard
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Angewandte Chemie (International edition)
- volume
- 54
- issue
- 5
- pages
- 1452 - 1455
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:25504340
- wos:000348713900005
- pmid:25504340
- scopus:85027951884
- ISSN
- 1521-3773
- DOI
- 10.1002/anie.201407858
- language
- English
- LU publication?
- yes
- id
- 92a97bc6-f8e5-42cf-8fd3-6f4cf6b03531 (old id 4908390)
- date added to LUP
- 2016-04-01 10:38:26
- date last changed
- 2022-04-20 04:45:16
@article{92a97bc6-f8e5-42cf-8fd3-6f4cf6b03531,
abstract = {{Two coarsening mechanisms of emulsions are well established: droplet coalescence (fusion of two droplets) and Ostwald ripening (molecular exchange through the continuous phase). Here a third mechanism is identified, contact ripening, which operates through molecular exchange upon droplets collisions. A contrast manipulated small-angle neutron scattering experiment was performed to isolate contact ripening from coalescence and Ostwald ripening. A kinetic study was conducted, using dynamic light scattering and monodisperse nanoemulsions, to obtain the exchange key parameters. Decreasing the concentration or adding ionic repulsions between droplets hinders contact ripening by decreasing the collision frequency. Using long surfactant chains and well-hydrated heads inhibits contact ripening by hindering fluctuations in the film. Contact ripening can be controlled by these parameters, which is essential for both emulsion formulation and delivery of hydrophobic ingredients.}},
author = {{Roger, Kevin and Olsson, Ulf and Schweins, Ralf and Cabane, Bernard}},
issn = {{1521-3773}},
language = {{eng}},
number = {{5}},
pages = {{1452--1455}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Angewandte Chemie (International edition)}},
title = {{Emulsion Ripening through Molecular Exchange at Droplet Contacts.}},
url = {{http://dx.doi.org/10.1002/anie.201407858}},
doi = {{10.1002/anie.201407858}},
volume = {{54}},
year = {{2015}},
}