Interfacial composition and characterization of a quaternary water-in-oil mixed surfactant (cationic of different alkyl chain lengths + polyoxyethylene type nonionic) microemulsions in absence and presence of inorganic salts

- Synergism in spontaneity of formation of mixed microemulsion has been observed.
- Increase in alkyl chain length of cationic surfactant shrinks droplet size.
- Change of droplet size affects states of water organization inside pool.
- Influence of different inorganic salts at oil/water interface has been investigated.
- Inorganic salts modify water structure in confined environment.