Fat emulsions are mixtures of lipid molecules that are sparingly soluble or insoluble in water, however, they are freely soluble in organic solvents such as benzene, ether, and alcohol.
In water, the lipids are insoluble as the polar groups it contains are greatly smaller compared to their nonpolar parts.
The nonpolar chain of a lipid molecule is a long, complex hydrophobic hydrocarbon chain.
The non-polar proteins provide them with a hydrophobic or water repellent attribute.
If lipids are shaken in the water, they tend to form micelles or small droplets.
The complex formed is known as emulsions which are a mixture of oil in water.