Abstract
A water-in-oil microemulsion with low water content was combined with water in a stop-flow equipment to form a system that at equilibrium would be a (water+lamellar liquid crystal)-in-(water-in-oil) microemulsion ((W+LLC)/(W/O) μem) emulsion and the growth of droplets and liquid crystal particles was followed by measuring the intensity of scattered light; both of total scattered light and that passing through crossed polarizers.
The total scattered light intensity was reduced during 5 s with a subsequent slow increase, while the birefringent part showed an initial growth during 1.2 s followed by a slow reduction.
The results are interpreted as the primary formation of lamellar liquid crystal particles at the water/microemulsion interface. These are dispersed in the oil phase and accounting for the initial growth of the intensity of scattered light through crossed polarizers. Subsequent dissolution of the liquid crystal to form W/O microemulsion droplets accounts for the reduction of this part of the intensity of scattered light. Separate experiments under non-equilibrium conditions demonstrated the growth of a liquid crystal to be significantly faster than the formation of W/O microemulsion droplets and that the transition of a lamellar liquid crystal to W/O microemulsion droplets was monitored by the droplet diffusion rate away from the interface.
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© 1998 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
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Friberg, S.E., Zhang, Z., Patel, R., Campbell, G., Aikens, P.A. (1998). Kinetics of formation of structures in a three-phase system water/lamellar liquid crystal/water-in-oil microemulsion after shear. In: Lindman, B., Ninham, B.W. (eds) The Colloid Science of Lipids. Progress in Colloid & Polymer Science, vol 108. Steinkopff. https://doi.org/10.1007/BFb0117955
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DOI: https://doi.org/10.1007/BFb0117955
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