Stability of PVA-Adsorbed Alkane-in-Water Nanoemulsions: A Turbiscan Study br

In this study, the stability behaviors of oil-in-water nanoemulsions that were prepared via sonication using a polyvinyl alcohol (PVA) stabilizer, containing various homologous straight-chain alkanes and binary alkane mixtures, were investigated. Despite the similarity in the chemical structures of the studied alkanes and their similar interfacial ten-sions with the aqueous PVA solution, the resulting emulsions with various compositions revealed systematically different stability behaviors, confirmed without ambiguity using a Turbiscan instrument. Overall, emulsions containing higher-car-bon-number alkanes, having lower solubility in the continuous phase, exhibited remarkably higher long-term stability, which suggested the significance of the molecular diffusion in destabilization mechanisms of the alkane-in-water nanoemulsions