Nonionic Emulsions and Microemulsions

We start with the simpler case of emulsions and/or microemulsions, stabilised with nonionic surfactant. This means that there are no charge effects present and in the extremely simplest situation (all long range forces are neglected, including van der Waals) we may account only for the surface bending. For a small deformation  

A convenient way to obtain the thermodynamic properties of dense colloidal suspensions is to employ the Omstein-Zemike integral equation approach for calculating the radial distribution function of the particles (deformable fluid droplets in our case). This equation reads 

Another useful quantity is the structure factor, S q), defined by  

Therefore the integral equation approach allows us to obtain all the information about the thermodynamic properties of mini- and microemulsions and to compare (in some cases) the results with relevant experimental data or computer simulations. 

2 Modified Carnahan-Starling Equation for Dispersions of Deformable Droplets 

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