两性双子表面活性剂的合成及性能评价

Synthesis and performance evaluation of amphoteric gemini surfactant

通过磺化、季铵化和酯化三步反应合成了季铵盐磺酸(盐)型双子表面活性剂,该表面活性剂的水溶液最低表面张力为28.0 mN/m,临界胶束浓度为0.8 mmol/L,等电点pH为7.5～10.0。考察了其发泡性、乳化性等,结果表明,该目标物具有较高的表面活性和较好的乳化效果。

A new type of gemini surfactant with the structure of quaternary and sulfonate was synthesized.It was made by typical reactions of sulfonation,quaterisation and esterification.Its physiochemical properties in aqueous solution were determined as follows： 28.0 mN/m of the lowest surface tension,0.8 mmol/L of critical micelle concentration,7.5～10.0 of isoelectric point pH value.Foaming and emulsification properties of the gemini surfactant were also discussed.Experiments results indicated that gemini surfactant has higher surface activity and better emulsifying effect.