Research progress on Gemini surfactants for oil displacement
Gemini surfactants have high interfacial activity,low critical micelle concentration,good temperature,and salt resistance.They have important research value in improving crude oil recovery.According to the different charges carried by hydrophilic groups,Gemini surfactants can be divided into four types:anionic,cationic,zwitterionic,and nonionic.The research progress of four types of Gemini surfactants used in oil displacement in China and abroad was introduced.The synthetic methods and physicochemical properties of these four surfactants were reviewed,including surface properties,interface properties,wetting properties,temperature,and salt resistance.Finally,some existing problems and future development directions of Gemini surfactants in the oil displacement field were clarified.
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维普
