Osmotic Stress Resistance Measurements

Rgure 4.7. Evolution of the osmotic resistance H normalized by w/ for PDMS-in-water emulsions. The dashed line is a visual guide. The solid line corresponds to the best fit of the normalized data obtained by Mason et al. [7]. (Adapted from [31].) 

A set of experiments was performed at variable droplet sizes. The graph in Fig. 4.7 shows the dependence of the normalized (by Kint/a) osmotic resistance as a function of the oil volume fraction. The normalized values fall onto a single curve within reasonable experimental uncertainty. The results were compared to the normalized data obtained by Mason et al. [7] in the presence of surfactants. These latter are represented as a solid line that corresponds to the best fit to the experimental points (Eq. (4.18)). It is worth noting that the normalized pressures in solid-stabilized emulsions are much larger than the ones obtained in the presence of surfactants. 

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