TWL+intermolecular+force

__**EMULSION**__ __**INTERMOLECULAR FORCE**__
 * 1) There are 2 intermolecular forces which affect the stability of dispersed system.
 * 2) Van der Waals force is an attractive force, which tends to destabilize the emulsion.
 * 3) Electrostatic force is a repulsive force, which gives stability to the emulsion.
 * 4) When the total attractive forces > total repulsive forces, the emulsion is unstable.
 * 5) When total repulsive forces > total attractive forces, the emulsion is stable.
 * 6) Often, emulsions are inherently unstable.
 * 7) The small suspended droplets first coalesce into less stable, larger droplets. This coalescence then continues until the emulsion breaks into two layers.
 * 8) This phenomenon can occur over a relatively short period of time.
 * 9) If a long emulsion lifetime is required, therefore, a stabilizer needs to be added.
 * 10) This stabilizer is usually a surfactant.



Electrostatic stabilization of colloids:
 * __ELECTROSTATIC FORCE__**

A mechanism in which the attraction Van der Waals forces are counterbalanced by the repulsive Coulomb forces acting between negatively charged colloidal particles.