O/W型乳化における炭化水素鎖長の影響

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This paper deals with the effect of the concentration of emulsifying agent and of the carbon number of the hydrocarbon used as dispersed phase on O/W-type emulsion. The apparatus consists of a cylindrical vessel (d=150 mm), made of clear acrylate resin, and Rushton-type impeller (d=49 mm). Mixtures of CCl_4 and a hydrocarbon (C_5H_<12>, C_6H_<14>, C_7H_<16>, C_<10>H_<22> and C_<16>H_<34>) were used as the dispersed phase and distilled water as the continuous phase. Tween-20 or Tween-81 was used as the emulsifying agent, the concentration of which was 1.0,0.1,10^<-2>, 3×10^<-3>, or 10^<-3>% (w/w). The mixture was agitated continuously for 60 min, and revolution number was constant (400 rpm). The dispersed droplets of the emulsion were photographed by a microscopic method, and particle size distribution was determined. The following results were obtained in this experiment. (1) Effect of emulsification by Tween-20 was better than that by Tween-81 on O/W-type emulsion.(2) As the carbon number of hydrocarbons in the dispersed phase became smaller, specific interfacial area became larger.(8) If agitation energy is expressed by E_A and surface energy by E_S, energy efficiency of dispersion may be defined by the equation η=E_S/E_A. As the carbon number of hydrocarbons became smaller, the energy efficiency η increased.
公益社団法人日本薬学会の論文
1974-04-25