Abstract

In this work, a PAMAM@SiO₂ demulsifier was synthesized by the reaction of a hyperbranched poly (amido amine) (PAMAM) and KH570 modified SiO₂. The structure, morphology and composition of PAMAM@SiO₂ were characterized by FT-IR, SEM and EDS. The effect of the concentration of PAMAM@SiO₂, salinity and temperature on the demulsification performance was systematically studied. The results showed that the transmittance of aqueous phase after demulsification could reach as high as 92.1% at optimal conditions, and corresponding oil removal rate was 99.53%. Interfacial activity, three-phase contact angle, self-assembly of interfacial film and dynamic interfacial tension were investigated to explore the demulsification mechanism. Also, the aggregation process of oil droplets in emulsion was observed with a microscope. It indicates that the PAMAM@SiO₂ demulsifier has a potential application in the treatment process of oily wastewater.

摘要

在这项工作中，通过超支化聚酰胺胺 (PAMAM) 和 KH570 改性 SiO 2 的反应合成了_PAMAM @SiO ₂破乳剂。_{PAMAM@SiO 2}的结构、形貌和组成通过FT-IR、SEM和EDS表征。_{PAMAM@SiO 2}浓度的影响、盐度和温度对破乳性能的影响进行了系统研究。结果表明，在最佳条件下破乳后水相的透光率高达92.1%，相应的除油率为99.53%。考察了界面活性、三相接触角、界面膜自组装和动态界面张力，探讨破乳机理。另外，用显微镜观察乳状液中油滴的聚集过程。这表明PAMAM@SiO ₂破乳剂在含油废水的处理过程中具有潜在的应用价值。