Surfactants are the substances which allow the mixing of oil with water. They allow to reduce interfacial tecnsion.
There are four different types of surfactants:
1. Amphoteric Surfactants.
2. Cationic Surfactants.
3. Anionic Surfactants.
4. Non-ionic Surfactants.
Applied Surfactants: Principles and Applications by Tharwat F. Tadros
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