The Dow Corning Corporation, Midland, MI 48686, USA.
J Colloid Interface Sci. 2009 Dec 15;340(2):261-8. doi: 10.1016/j.jcis.2009.08.038. Epub 2009 Sep 3.
A gel emulsion with high internal oil phase volume fraction was formed via an inversion process induced by a water-oil ratio change. The process involved the formation of intermediate multiple emulsions prior to inversion. The multiple emulsions contain a liquid crystal formed by the surfactant with water; this was both predicted by the equilibrium phase diagram as well as observed using polarization microscopy. These multiple emulsions were more stable compared to alternative multiple emulsions prepared in the same way with a surfactant that does not form liquid crystals. While the formation of a stable intermediate multiple emulsion may not be a necessary condition for the inversion to occur, the transitional presence of a liquid crystal proved to be a significant factor in the stabilization of the intermediate multiple emulsions. The resulting gel emulsion contained a small fraction of the liquid crystal according to the phase diagram, and it exhibited excellent stability.
通过水油比变化引发的相转变过程，可以形成高内相比的凝胶乳液。该过程涉及中间多重乳液的形成，然后才发生相转变。多重乳液中含有由表面活性剂和水形成的液晶，这既可以通过平衡相图预测，也可以通过偏光显微镜观察到。与使用不形成液晶的表面活性剂以相同方式制备的替代多重乳液相比，这些多重乳液更加稳定。虽然形成稳定的中间多重乳液可能不是相转变发生的必要条件，但液晶的过渡存在被证明是中间多重乳液稳定的重要因素。根据相图，所得凝胶乳液含有少量的液晶，表现出优异的稳定性。
