Phase inversion emulsification of paraffin oil/polyethylene wax blend in water: A comparison between mixed monomeric and monomeric/gemini surfactant systems

•Natural-based gemini surfactant (GS) reduced water surface tension more than Tween80.•Using GS reduced water phase volume fraction at phase inversion point (fw,inv).•Change in fw,inv with polyethylene was alike change in phases interfacial tension.•Rheological properties of emulsions highly depended on crystallinity of oil phase.•Higher stability of emulsions was achieved by GS due to their higher zeta potential.