Abstract.
We studied a new kind of W/O emulsions based on a lyotropic liquid crystal as the aqueous droplet phase. The cholesteric phase, a solution hydroxypropyl cellulose in water was dispersed in the continuous oil matrix, paraffin oil or heptane. We made a specific choice of surfactant in order to impose director anchoring conditions at the oil-water interface and orient the liquid crystal inside the droplet. The strong anchoring conditions resulted in a topological defect inside the droplets of size above the critical value R*. The defect elastic energy creates a barrier against droplet coalescence, the effect of topological size selection. We have studied the orientation of the director inside the droplets and their size distribution.
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Tixier, T., Heppenstall-Butler, M. & Terentjev, E. Stability of cellulose lyotropic liquid crystal emulsions. Eur. Phys. J. E 18, 417–423 (2005). https://doi.org/10.1140/epje/e2005-00053-6
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DOI: https://doi.org/10.1140/epje/e2005-00053-6