Intermicellar force

Mesophases formed by the operation of intermicellar forces at sufficiently close intermicellar distance and separation, from micellar forms, fluid in character, organized by the operation of intramicellar forces dependent on composition and temperature... 

As the surfactant concentration is further increased, intermicellar forces come into play and give rise to liquid crystalline phases, also called lyotropic phases or mesophases. The structure of mesophases can be extremely varied (see below). 

The discussion on micelles in Section III considered only the intramicellar interactions that give rise to micelles of finite size and of different shapes. Those forces work parallel to the micelle-water interface.As the surfactant concentration increases further, intermicellar forces come into play. 

Intermicellar forces are generally of a repulsive nature (i.e., charged amphiphiles) and a reduction of such repulsion accompanies the transformation from spherical to cylindrical micelles. Further increase of concentration results in the formation of linear assemblies and liquid crystalline lyotropic mesophases (cf. Section ni.B). Not only nematic (Nc and Nd from rodlike or disklike shapes, respectively), hexagonal, and smectic phases, but also biaxial (mixtures of Nc and Nd) and complex cubic phases (bicontinuous networks or plastic crystals)... 

The intermicellar exchange process, governed by the attractive interactions between droplets, can be modified by changing the bulk solvent used to form reverse micellar solution (26). This is due to the discrete nature of solvent molecules and is attributed to the appearance of depletion forces between two micelles (the solvent is driven off between the two droplets) (26). When the droplets are in contact forming... 

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