Emulsions are formed when two immiscible liquids are mixed.
One liquid (the dispersed phase) is dispersed as droplets (from
0.10 lm to a few lm of diameter) in the other (the continuous
phase) (McClements, 2007). Forming emulsions requires energy
to increase the interfacial area between continuous and dispersed
phases. Emulsified systems are thermodynamically unstable
because of the surface tension between oil and water, which
opposes to the increase of interfacial area.