Highly monodispersed oil-in-water (O/W) emulsions with narrow droplet size distribution (span) were prepared using swirl flow membrane emulsification at high dispersed phase fluxes (up to 15.6 m3/m2h) greater than the droplet dripping mode of droplet formation and at very low concentrations of sodium dodecyl sulphate (SDS) surfactant (as low as 0.01 wt.%). The swirl flow membrane emulsification method involved the generation of a centrifugal kind of flow in the continuous phase. This exerted higher radial shear stresses on the membrane wall which overcame the higher kinetic energy of the dispersed phase emerging from membrane pores when high dispersed phase fluxes were applied. The emulsions droplet size (d50) was in the narrow range of 30.2 to 35 and span of 0.239 to 0.34 for swirl flow ME as compared to the highly polydispersed emulsions with d50 in the range of 38.8–43.5 μm and span in range of 0.65–2.32 for the cross-flow ME method, for the 9.6 μm SPG membrane.
|Chemical Engineering and Processing - Process Intensification
|Published - Nov 2019
All Science Journal Classification (ASJC) codes
- General Chemistry
- General Chemical Engineering
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering