Lyophobic and Lyophilic Colloids

Lyophobic Colloids:

• Colloidal solution in which the dispersed phase has very little affinity for the dispersion medium are termed as lyophobic colloids. 
• Irreversible in nature and once precipitation can not easily pass into colloidal state because particles are solvent hating.
• They are unstable and the particles are aggregates of thousands of molecules.
• Low concentration of dispersed phase are possible. Example. Sulphur in water.

Lyophilic Colloids:

• Colloidal solution in which are dispersed phase has considerable affinity for the dispersion medium are called lyophilic colloids.
• Reversible in nature and once precipitated can readily pass into colloidal state because particles are solvent loving.
• They are stable and self stabilized.
• Particles are true molecule and bigger size.
• High concentration of dispersed phase are possible. Example: Gelatin, Starch and protein.