Optimization of Preparation Technology of Torreya grandis Oil Microemulsion by Response Surface Methodology
Torreya grandis has high nutritional value.In order to improve the stability and water solubility of Torreya grandis oil,the main component of Torreya grandis oil was made into microemulsion.The formula of microemulsion was preliminarily screened by single factor experiment,the amount of emulsifier,emulsifier,oil phase and water phase were used as factors,and the preliminary formula for microemulsion was constructed.The formulation of Torreya grandis oil microemulsion was optimized by response surface methodology,the results showed that the optimal prescription and process were as follows:Torreya grandis oil as oil phase,anhydrous ethanol as cosurfactant,PEG-40 and TW-80 as surfactants,oil phase∶ethanol∶PEG-40∶TW-80∶water phase=18∶21∶7∶14∶360 and emulsified at 58 ℃,1200 r/min for 60 minutes.The stability and morphology of Torreya grandis oil microemulsion were evaluated.The results showed that the sample was O/W type microemulsion with an average particle size of 24.56 nm,PDI(Polydispersity index)of 0.53,Zeta potential of-1.095 mV,and had good stability without stratification at 4000 r/min centrifugation for 15 min.The results provide reference for the value utilization of Torreya grandis oil.
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