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研究了具有非离子和阳离子双重特性的表面活性剂──双（月桂酸）三乙醇胺酯在稀盐酸溶液中未成囊泡的性质．发现只有当溶液pH值小于4．2时，囊泡才能形成，而在溶液pH值2~3范围内，囊泡稳定性和“耐盐”能力最佳．这些特性被归之于此化合物酸性水解作用的结果．
The non-vesiculated nature of bis (lauric acid) triethanolamine ester in dilute hydrochloric acid solution was investigated with the nonionic and cationic double surfactants. It was found that the vesicles formed only when the pH value of the solution was less than 4.2, while the vesicle stability and salt tolerance were the best in the pH range of 2 ~ 3. These properties are attributed to the acidic hydrolysis of this compound.