Monodispersed emulsion prepared by two-stage membrane jet-flow emulsification

To resolve the paradox between particle size of emulsion and flux in the conventional membrane emulsification, a process including two-stage ceramic membrane emulsification under jet flow was proposed. Under a higher pressure, two submerged ceramic membrane emulsification apparatuses were used in series. ZrO₂ membrane with a pore size of 0.16 μm was used in the first stage and α-Al₂O₃ with a pore size of 1.5 μm was used in the second stage. The toluene was used as the continuous phase and the water was used as the dispersed phase, the surfactant SDS and OP was separately used as the emulsifier. The two emulsions prepared by the method were also monodispersed and the energy consumption of the two cases was separately 1.53 × 10⁵ J/m³ and 1.21 × 10⁵ J/m³, which shows shorter time and lower energy cost are required to obtain monodispersed emulsion by using this method.