TY  - JOUR
AB  - Vesicles are self-assembled spherical aggregates of amphiphilic molecules with rich structural variety. They have attracted increasing attention due to their possible applications in pharmaceutics and cosmetic fields, but also from a more fundamental point of view. In this work, we present vesicle formation from mixtures of commercial surfactants. We show how mixing of two non-ionic surfactants can lead to vesicle formation by adjusting the packing parameter of the mixture. High-frequency viscosity data can be described in terms of an effective hard sphere system applying the Lionberger-Russel model. Thus, we were able to estimate the hydrodynamic volume of the vesicles and hence their average size, which agrees well with the structures observed by transmission electron microscopy. Finally, we show that oil-in-water emulsions prepared with the adjusted surfactant mixture have two orders of magnitude higher viscosities compared to similar emulsions stabilised with an anionic surfactant, demonstrating the significant impact of the vesicles on the rheological and hence creaming behaviour of emulsions. (c) 2005 Elsevier B.V. All rights reserved.
DA  - 2005
DO  - 10.1016/j.colsurfa.2005.04.033
KW  - vesicle formation
KW  - surfactants
KW  - packing parameter
KW  - Lionberger-Russel
KW  - model
KW  - emulsions
LA  - eng
IS  - 1-3
M2  - 204
PY  - 2005
SN  - 0927-7757
SP  - 204-210
T2  - Colloids and Surfaces A: Physicochemical and Engineering Aspects
TI  - Vesicles as rheology modifier
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29138571
Y2  - 2024-11-21T23:12:16
ER  -