Abstract:

Paraffin emulsion was prepared from liquid paraffin by the means of adding coemulsifier. The effects of the emulsifie species and their dosages, water dosage, emulsifying temperature, and emulsifying time on the paraffin emulsion properties were studied. The results showed that composite emulsifiers could provide better performance for the paraffin emulsion. The influencing factors can be arranged in order：water dosage>emulsifier dosage>emulsifying temperature>emulsifying time. Stable paraffin emulsion can be prepared under the optimum conditions：m(glycerol monostearate)/m(Tween80)=3∶4, emulsifier dosage 0.9％，emulsifying temperature 85 ℃，emulsifying time 50 min，water dosage 62.0％ and stirring speed 1 100 r/min. The experimental result indicated that the liquid paraffinemulsion had better stability density and dispersibility.

Key words: Liquid paraffin, Coemulsifier, Composite emulsifier

摘要： 以液体石蜡为原料,采用添加助剂的方法,制备了石蜡乳液。探讨了乳化剂种类及其质量分数、乳化水质量分数、乳化温度、乳化时间等因素对乳化效果的影响。结果表明,复配乳化剂乳化效果较好,各因素对乳化效果的影响程度依次为乳化水质量分数、乳化剂质量分数、乳化温度、乳化时间,确定最佳实验条件为:m (单甘脂)/m (Twee-80)=3∶4,乳化剂质量分数0.9 %,乳化温度85 ℃,乳化时间50 min,乳化水质量分数62.0 %,转速1 100 r/min。石蜡乳液的稳定性和分散性较好,密度符合要求。

关键词: 液体石蜡, 助剂, 复配乳化剂