Micelle formation of Tween 20 nonionic surfactant in imidazolium ionic liquids

- Micellar aggregation behavior of nonionic Tween 20 surfactant was investigated in eleven imidazolium ionic liquids.
- Structures of both cation and anion species affect amphiphile self-assembly ability.
- Addition of [BMIM][BF4], the ionic liquid with a good ability to support Tween 20 micelle formation, facilitates micelle formation in [BMIM][TfO].
- Micellar solutions of Tween 20/IL were analyzed as dispersion systems according to effective-medium approximation theories.