ZHAO Xiao-juan1, GONG Cheng-ke2, LIU Xiong1
(1. Commonality Department, Gansu College of Tradiional Chinese Medicine, Lanzhou 730000,China; 2. Lanzhou Instiute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000,China)
Abstract: The premicellization of C12-2-En-C12×2Br in an aqueous solution has been investigated by the steady state fluorescence method using 1-Pyrenebutyric acid (PBA) as the probe. The critical premicelle concentrations (cpc) at 30oC were 0.0295(n=1), 0.0373 (n=2) and 0.0501 (n=3) mmol/L, respectively. Compared with the traditional method (i.e., conductivity method), the steady state fluorescence method is more sensitive to illustrates the premicellar behavior of gemini surfactants, and it is a suitable method for the determination of critical premicelle concentrations of gemini surfactants.
Key words: Gemini surfactant;1-Pyrenebutyric acid fluorescence probe;preaggregation
E-mail: gongchke@126.com
Analysis and Testing Technology and Instruments, Vol. 17, No. 4, 2011,198-202
