Wax Stabilized Double Emulsions: Temperature Controlled 'Coalescence or Release' of Inner Drops
Wax stabilized double emulsions are generated using a technique called melt emulsification that was developed in the Weitz lab; this technique uses heated microfluidic devices and molten wax as the middle phase. The advantage of using wax is its ability to stabilize the interface between inner drops and the middle phase without the need of surfactants or particles. After these emulsions are made, they are used as temperature sensitive drops to either controllably coalesce or release their inner payload as shown in the You Tube videos below.
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