Synthesis And Properties Of Cationic Gemini Surfactant

Gemini surfactant is a new type of surfactant has a special molecular structure. It has a higher surface activity and lower CMC values than conventional surfactants. It can be formed low oil/water interfacial tension with crude oil, Easier to aggregate into micelles. It has excellent wetting properties, Good synergy with common surface active agents. The excellent performance of the Gemini surfactant become one of the hot topics that people chase in recent years.In this paper, Six cationic Gemini surfactant are synthesized:C14-S-C14·2Br, C16S-C16·2Br.C18-S-C18·2Br(S=2,4,6). Measuring the surface tension by surface tension meter, Shows that compared to conventional surfactants, six cationic gemini surfactant has a small surface tension and a low critical micelle concentration. Determination the oil/water interfacial tension between the six cationic gemini surfactant and crude oil from Daqing Oil Production Plant, The following conclusions:Synthesis of six cationic gemini surfactants can reduce the minimum oil/water interfacial tension reached10-4magnitude. Complex with common anionic surfactant SDS, Determination of the surface tension of complex systems, Has a more excellent performance, The surface-active is stronger than either a component. This six cationic gemini surfactant with excellent performance, After compounding the complex system more excellent performance.