F. Müller, J. Peggau, J. Meyer, R. Scheuermann
April 2, 2013
Stable dispersions of either gas bubbles or solid particles like abrasives become increasingly attractive for the home care market. The property to yield a stable dispersion is not necessarily linked to a high viscosity in general but requires a highly viscous, solid-like behaviour under rest as well as a liquid-like flow behaviour under shear. A gel comprising such a yield zone can be obtained by creating multi-lamellar vesicles with a rather stiff shell. Due to the repulsion forces of opposite electric charges the combination of suitable anionic and cationic surfactants yields vesicles that are inflexible enough to comprise a yield zone. Surfactants which are appropriate to yield suitable vesicle gels can be chosen according to their spatial dimensions since the geometry of the molecules determines their aggregation behaviour. With this, new formulation possibilities for bathroom cleaners or scouring liquids are available.