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Rheological Behavior of Viscoelastic Wormlike Micelles in CTAB/SSS/H2O Systems |
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| Authors: | Tao Wan Denghui Wang Junyan Hu Zhiling Zhou Haibo Zhang Daolu Bu |
| Institution: | 1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu , Sichuan , P. R. China;2. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions , Chengdu University of Technology , Chengdu , Sichuan , P. R. China;3. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions , Chengdu University of Technology , Chengdu , Sichuan , P. R. China |
| Abstract: | The effect of the addition of sodium 4-styrenesulfonate (SSS) and KNO3 as well as temperature and shear rate on the structural transition of aqueous micellar solutions of the cationic surfactant cetyl trimethyl ammonium bromide (CTAB) was studied by viscosity. The effect of hydrocarbons on viscoelastic CTAB solutions was also examined. Possible mechanism for formation of CTAB wormlike micelles in the presence of sodium 4-styrenesulfonate (SSS) and KNO3 was discussed. The rapid increase in the apparent viscosity of CTAB solutions on the addition of SSS and KNO3 was due to the transition in micellar shape from spheres to wormlike ones. The rheological properties of CTAB solutions fit Maxwell model at low shear frequency. AFM image indicated a structure of transient network of CTAB/SSS/KNO3/H2O solution. |
| Keywords: | Micelles viscoelasticity viscosity wormlike |