Abstract
This work addresses the influence of partially hydrophobic aluminum particles on the interfacial properties of o/w and w/o dispersions. For this purpose, drop size distributions are determined in an agitated tank followed by batch settling experiments after stirrer stop. In presence of hydrophobized aluminum particles, the type of dispersion (o/w or w/o) has an unexpected influence on coalescence behavior. Particles accelerate the coalescence for o/w dispersions (low oil fraction) but hinder the coalescence for w/o dispersions (high oil fraction). For a deeper understanding of this effect, an in-depth characterization and comparison of the drop size distributions of the two dispersion types was performed.
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