Abstract
Paraffin-water emulsions were prepared by using a phase transformation emulsification method. Span80 and Tween80 were used as the emulsifiers. Paraffin content up to 40% could be obtained by using such a method. The emulsions were characterized for their viscosity and latent heat by using the NDJ-1 viscometer and the Q10 differential scanning calorimeter(DSC), respectively. The results showed that uniform and stable paraffin wax emulsions could be obtained when the HLB of emulsifiers was about 10(i.e. the weight ratio of Span80 to Tween80 was round 46.8 ∶ 53.2). The viscosity of the emulsions increased sharply with increasing wax content, whereas the latent heat was at maximum when the oil and water phases coexisted. When the emulsion contains the oil phase only,the latent heat increased with increasing water content, while the latent heat of the emulsions decreased with increasing water content when the emulsion contains the water phase.
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