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将失水山梨醇单油酸酯 ( Span80 )分别和四种聚氧乙烯 ( 2 0 )失水山梨醇酯 ( Tween2 0 ,Tween40 ,Tween6 0 ,Tween80 )按各种比例复配 ,在不同乳化剂总用量下乳化固定比例菜油—水体系 ,用分散相的相对体积分布来评价乳状液的稳定性 ,研究乳化剂总用量对最佳 HLB值的影响。实验发现 :Span80 - Tween2 0体系在较高总用量下在较宽 HLB值范围内均能获得较稳定乳状液 ;Span80 - Tween40、Span80 - Tween6 0和 Span80 - Tween80体系则随乳化剂用量增大而最佳 HL B值范围变窄 ,且有一个最佳乳化剂总用量 ,乳化剂总用量过高时乳状液稳定性反而下降 ;随乳化剂总用量增大 ,Span80 - Tween2 0和 Span80 - Tween6 0体系的最佳 HL B值均发生右移。文中对各种不同实验现象作出了较统一的解释。
Sorbitan monooleate (Span80) and four polyoxyethylene (20) sorbitan esters (Tween20, Tween40, Tween60, Tween80) were formulated in various proportions and emulsified in different emulsifiers The total amount emulsified fixed ratio of rapeseed oil - water system, the relative volume distribution of dispersed phase to evaluate the stability of the emulsion, the study of the total amount of emulsifier on the best HLB value. The experimental results showed that Span80 - Tween20 system could obtain more stable emulsions at a higher HLB value. Span80 - Tween40, Span80 - Tween60 and Span80 - Tween80 systems increased with the amount of emulsifier The optimum range of HLB value is narrowed, and there is an optimum amount of emulsifier. When the total amount of emulsifier is too high, the emulsion stability decreases. With the increase of emulsifier, Span80 - Tween20 and Span80 - Tween60 The best HL B values for the system are shifted to the right. In this paper, a variety of different experimental phenomena made a more uniform explanation.