Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/7256
Título: How does a non-ionic hydrophobically modified telechelic polymer interact with a non-ionic vesicle? Rheological aspects
Autor: dos Santos, T.
Medronho, B.
Antunes, F. E.
Lindman, B.
Miguel, M. G.
Data: 2008
Editora: Elsevier Science BV
Resumo: The association between hydrophobically modified polyethylene glycol, HM-PEG, and non-ionic vesicles of tetraethylene glycol monododecyl ether, C12E4, was investigated. HM-PEG is in a triblock form, with an alkyl chain attached to each hydrophilic polymer-end. Such polymer structure is denoted as telechelic. The vesicle average radius was measured by self-diffusion measurements. The system exhibits both a monophasic gel and biphasic regions. The monophasic region was characterized from a theological point of view. We argue that the gel formation is due to the presence. of polymer crosslinks between different surfactant aggregates, once the polymer's hydrophobic moieties may adsorb into the vesicle bilayer. This association is strongly concentration dependent which is reflected in the monotonic increase of the storage modulus, relaxation time and shear viscosity with the addition of surfactant and/or polymer. (C) 2007 Elsevier B.V. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.1/7256
DOI: https://dx.doi.org/10.1016/j.colsurfa.2007.03.045
ISSN: 0927-7757
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)



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