以水、甜杏仁油和小麦胚芽为原料，采用分散均质机高速剪切制备乳状液。利用纳米粒度仪、电子显微镜、界面张力仪和流变仪对样品的性质进行分析。结果表明，乳状液中体积分数最高的液滴粒径为0.4 μm，液滴呈紧密堆积，小麦胚芽乳化剂的临界胶束浓度为3.1%。乳化剂质量分数为3%的乳液的弹性模量始终大于黏性模量，随着剪切速率的增加，乳液表现出剪切稀化。对自制的保湿乳液进行保湿效果评价，结果表明，相比于皮肤自身，保湿乳液具有大约8 h的保湿效果。

Using water,sweet almond oil and wheat germ as raw materials,the emulsion is prepared through high-speed shearing with dispersing homogenizer.Nano particle size analyzer,electron microscope,interfacial tension meter and rheometer are utilized to analyze the properties of the samples.The results show that the droplets with the highest volume fraction in the emulsion have a particle size of 0.4 μm,and the droplets are packed tightly.Wheat germ emulsifier has a critical micelle concentration of 3.1%.If emulsifier counts a mass fraction of 3%,the elastic modulus of the emulsion is always greater than the viscous modulus.As shear speed increases,the emulsion shows shear thinning.It is shown through evaluating the moisturizing effect of the self-made moisturizing emulsion that the moisturizing emulsion can maintain a moisturizing effect in about 8 hours compared to the skin itself.

易雄健(1993-),男,硕士研究生,研究方向为胶体与界面化学,y_xiongjian@163.com