1A dispersion in which the dispersed phase is
composed of small globules of a liquid distributed
throughout a vehicle in which it is immiscible
emulsion
2what is dispersed phase
internal phase
3what is the dispersion medium
external phase
4what is the third phase
emulsifying agent
5What is the HLB value of a surfactant system composed
of 10g Span 60 (HLB = 4.7) and 20g Tween 60 (HLB =
14.9)?
11.5
6Force causing each liquid to resist
breaking up into smaller drops of
particles
Interfacial Tension
7facilitate the breaking up of large
globules into smaller ones, which then
have a lesser tendency to reunite or
coalesce
surfactant
8assumes monomolecular layers of emulsifying
agent curved around a droplet of the internal
phase
ORIENTED WEDGE THEORY
9prevents contact and coalescing of the
dispersed phase
film
10places the emulsifying agent at the interface
between the oil and water, surrounding the
droplet of the internal phase as a thin layer of
film absorbed on the surface of the drops
interfacial theory