Effect of emulsion method and co-emulsifier on performance of castor oil emulsion

A blended emulsifier consisting of nonionic surfactant sorbitan mono-fatty acid ester(Span) and polyoxyethylene sorbitan mono-fatty acid ester(Tween) was applied to emulsify castor oil by three different emulsion methods,constant speed mixing,high shearing and ultrasonic,respectively.The influences of different co-emulsifiers with different chain length such as octanol,ethyl hexanol and dodecanol on stability of the caster oil emulsion were investigated.Results indicated that the stability of castor oil emulsion is improved with the increase of carbon number of the fatty alcohol.The castor oil emulsion prepared via ultrasonic method,both the original emulsion and diluted emulsion,shows good stability.