DIELECTRIC-SPECTROSCOPY AND EMULSIONS - A THEORETICAL AND EXPERIMENTAL APPROACH

The theoretical interpretation of experimental data from the previous papers (1,2) are extended with the purpose to demonstrate the possibil ities of a qualitative characterisation of flocculated emulsions by me ans of dielectric spectroscopy. Both low and high frequency limits of dielectric spectra are analysed, which is an extension of our previous paper (1) where only low frequency values were interpreted. Attention is paid to the emulsion stability with regard to flocculation in a di electric spectrum. The influence of salt concentration inside the aque ous droplets in the dispersed phase is interpreted. The theoretical in terpretation is based on a generalised model of the flocculated state, where flocs are characterised not only by their shapes , but also by their volumes. The information of floc properties obtained by means of dielectric spectroscopy, and different hydrodynamic estimations chara cterising the flocculation process is compared and correlations are es tablished.