Interconnecting charged microemulsion droplets via oppositely charged polyelectrolyte – effect of polyelectrolyte structure
By adding oppositely charged polyelectrolyte to ionic oil-in-water (O/W) microemulsions a network of microemulsion droplets is formed that is interconnected by electrostatic binding. Such network formation allows to control viscosity and internal mobility of the droplets (e. g. relevant for the release of solubilised active agents). A very important parameter for their understanding is the mesoscopic structure and in particular the interactions between the droplets which are modified by the presence of the polyelectrolyte. This question can only be addressed properly by SANS measurements as only contrast variation allows to determine exclusively the arrangement of the droplets within the droplet/polyelectrolyte complexes. Within the planned SANS experiments we will address especially the role of polyelectrolyte structure as we will vary the type of polyanion employed and also of the size of the droplets. This shall yield a comprehensive understanding of how the architecture of the polyelectrolyte and the curvature of the microemulsion droplets control the properties of such complex systems.
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GRADZIELSKI Michael; Leonardo Chiappisi; HOFFMANN Ingo; SCHWEINS Ralf; SIMON Miriam and YALCINKAYA Hacer. (2016). Interconnecting charged microemulsion droplets via oppositely charged polyelectrolyte – effect of polyelectrolyte structure. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-421
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