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7635120 
Journal Article 
Determination of Critical Micellar Aggregation Numbers of Surfactant by Steady-state Fluorescence Probe Method 
Shag Guoquan; Yang Zhanzhao; Wang Min; Zhao Qiwen; , 
2008 
CHINESE GERMAN CENT ENVIRON TECHNOL & KNOWL TRANSFER-CETK 
HEFEI 
420-423 
English 
WOS:000268664900097 
The critical micelle concentrations of Cetyltrimethylammonium bromide (CTAB), Sodium laurylsulfonate (C(12)AS) and the given mixtures at ratio 1/1 were measured by surface tension measurement in aqueous solution at room temperature. By drawing lgc-gamma to determine the CMC values are 0.00091mol/L, 0.0089 mol/L and 0.00004 mol/L. The results showed that the CMC of mixed surfactants was lower than the pure surfactants, showing a better synergetic behavior. To determine the micelle aggregation number with the method of a steady state fluorescence quenching Pyrene was used as probe and Benzophenone as quencher. The concentration of pyrene was fixed in 1 x 10(-5)mol/L, and the concentrations of Benzophenone were selected in difference. The results showed that the aggregation number increased linearly with the increasing of CTAB concentration. The micelle aggregation number of C(12)AS solution which is higher than the series of CMC concentration showed the trend of gradually increase. The micelle aggregation number which increased with the increasing of surfactant concentration of the mixed surfactant system were lower than that of pure C(12)AS and pure CTAB. 
C12AS; CMC; CTAB; Fluorescence probe (Py); Micelle aggregation number; Quencher (Benzophenone); Surface tension 
Nelles, M; Cai, JM; Wu, K; 
978-3-00-024606-7 
2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer 
Hefei, PEOPLES R CHINA