How does a non-ionic hydrophobically modified telechelic polymer interact with a non-ionic vesicle? Rheological aspects

Tiago dos Santos, Bruno Medronho, Filipe E Antunes, Björn Lindman, Maria Miguel

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

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.
Original languageEnglish
Title of host publicationColloids and Surfaces A: Physicochemical and Engineering Aspects
PublisherElsevier
Pages173-179
Volume319
DOIs
Publication statusPublished - 2008
Event20th European Colloid and Interface Society (ECIS) - Budapest, Hungary
Duration: 2006 Sept 172006 Sept 22

Publication series

Name
Number1-3
Volume319
ISSN (Print)0927-7757

Conference

Conference20th European Colloid and Interface Society (ECIS)
Country/TerritoryHungary
CityBudapest
Period2006/09/172006/09/22

Subject classification (UKÄ)

  • Physical Chemistry

Free keywords

  • gels
  • hydrophobically modified polymers
  • non-ionic surfactants
  • rheology
  • self-diffusion

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