Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (07): 763-766.doi: 10.3866/PKU.WHXB20040720

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The Viscosity Behavior of Gemini Surfactants

Han Li-Juan;Chen Hong;Luo Ping-Ya   

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Southwest Petroleum Institute, Nanchong 637001
  • Received:2004-01-08 Revised:2004-03-08 Published:2004-07-15
  • Contact: Chen Hong

Abstract: The viscosity behaviors of cationic gemini surfactants were investigated and the behaviors were found to be closely related to spacer groups and alkyl chains of the gemini surfactants. For gemini surfactants with shorter spacer group, i.e. s = 2, 3 or 4,their solutions exhibit striking viscosity behaviors. However, there is a time effect on viscosity for solutions of some gemini surfactants with s = 4. But for gemini surfactants with spacer group s = 6, the solutions have almost the same viscosity as that of solvent even at high concentration. The viscosity increases with the increasing of alkyl carbon number at the same surfactant concentration. For some surfactants with spacer group s =2 or 3, the viscosities of solutions undergo a maximum as a function of temperature. The mixtures of gemini surfactants and sodium salicylate (NaSal) also exhibit a great viscosification

Key words: Gemini surfactants, Viscosity, Time dependent