Formation and stabilization of perfluorocarbon emulsions

The formation and stabilization of perfluorocarbon emulsions with pluronic F-68 and soya lecithin were investigated. Greater ease of formation and stability were achieved with the soya lecithin. It was found that, in general, smaller droplet size was obtained with the emulsions prepared with lecithin, at all dispersed phase fractions. Zeta potential measurements indicated that the emulsions are stabilized via an electrostatic mechanism; the zeta potential increased with increasing lecithin concentration, up to a constant high value, and decreased with increasing dispersed phase fraction.