Plai Oil Itself as Oil Phase in Microemulsion Preparation: Development and Characterization

Suwit Khajitkhajonwong


Plai oil microemulsion systems were developed and prepared. Plai oil was successfully used as oil phase in microemulsion preparation. From pseudoternary phase results, the systems of Plai oil/water/Tween 80-absolute ethanol at the Tween 80-absolute ethanol weight ratio (Km) of 1:1 and 2:1 were found to provide larger single phase areas. As a result, there were eight prepared formulations, containing Plai oil at the concentration range of 14-30%, 50% of the mixture of Tween 80-absolute ethanol at the Km values of 1:1 or 2:1 and water at 20-36%, for physicochemical property investigation. It was found that all prepared formulations were transparent yellowish liquids. They were o/w microemulsions with the mean particle sizes of 42.1-60.1nm. They showed low viscosity values in the range of 14.57-63.60 cPs and pH in the range of 6.6-7.1.


Microemulsions; Plai oil

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