Determination of the Dominating Coalescence Pathways in Double Emulsion Formulations by Use of Microfluidic Emulsions

In water-in-oil-in-water (W1/O/W2) double emulsions several irreversible instability phenomena lead to changes. Besides diffusive processes, coalescence of droplets is the main cause structural emulsions, inner can coalesce with each other (W1–W1 coalescence), be released via (W1–W2 coalescence) and oil (O–O coalescence). Which pathways contributes most failure emulsion structure cannot determined by common measurement techniques. With monodisperse produced microfluidic techniques, path observed quantified simultaneously. By comparing occurrence all possible events, different hydrophilic surfactants in combination PGPR are evaluated discussed regard their applicability formulations. When variating surfactant, stability against three mechanisms This shows that measuring only one not sufficient describe a emulsion. While some able stabilize mechanisms, display mainly or cases