Kelarakis, Antonios, Castelletto, Valeria, Krysmann, Marta, Havredaki, Vasiliki, Viras, Kyriakos and Hamley, Ian W. (2008) Polymer-Surfactant Vesicular Complexes in Aqueous Medium. Langmuir, 24 (8). pp. 3767-3772. ISSN 0743-7463
Full text not available from this repository.
Official URL: http://dx.doi.org/10.1021/la703745z
The introduction of ionic single-tailed surfactants to aqueous solutions of EO18BO10 [EO = poly(ethylene oxide), BO = poly(1,2-butylene oxide), subscripts denote the number of repeating units] leads to the formation of vesicles, as probed by laser scanning confocal microscopy. Dynamic light scattering showed that the dimensions of these aggregates at early stages of development do not depend on the sign of the surfactant head group charge. Small-angle X-ray scattering (SAXS) analysis indicated the coexistence of smaller micelles of different sizes and varying polymer content in solution. In strong contrast to the dramatic increase of size of dispersed particles induced by surfactants in dilute solution, the d-spacing of corresponding mesophases reduces monotonically upon increasing surfactant loading. This effect points to the suppression of vesicles as a consequence of increasing ionic strength in concentrated solutions. Maximum enhancements of storage modulus and thermal stability of hybrid gels take place at different compositions, indicating a delicate balance between the number and size of polymer-poor aggregates (population increases with surfactant loading) and the number and size of polymer−surfactant complexes (number and size decrease in high surfactant concentrations).
|Subjects:||Physical sciences > Chemistry|
|Schools:||Faculty of Science and Technology > School of Physical Sciences and Computing|
|Deposited By:||Marta Krysmann|
|Deposited On:||14 Aug 2013 15:13|
|Last Modified:||15 Mar 2017 10:44|
Downloads per month over past year
Downloads for past 30 days
Repository Staff Only: item control page