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Citation: Zhu Sen, Cheng Fa, Zheng Bao-Jiang, Yu Jiu-Gao. Aggregation Properties of a New Anionic Gemini Surfactant in Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;2004, 20(10): 1245-1248. doi: 10.3866/PKU.WHXB20041016 shu

Aggregation Properties of a New Anionic Gemini Surfactant in Aqueous Solution

1.
Department of Chemistry, School of Science, Tianjin University, Tianjin　300072

Received Date: 24 March 2004
Available Online: 15 October 2004

A new anionic Gemini surfactant has been synthesized by the following method: firstly a “dimer" was prepared by the reaction of nonylphenol（NP）and 1,4-dibromobutane in the presence of a catalyst. The “dimer” was sulfonated with chlorosulfonic acid and then neutralized with sodium hydroxide to obtain the title-compound. Micellization of the Gemini surfactant was investigated by using drop volume method. Result showed that the critical micelle concentration (cmc) of the Gemini surfactant has a much lower value compared with those conventional monomeric surfactants. The aggregation number (N) of the micelle was determined with intrinsic fluorescence quenching method as a function of concentration. N es through a maximum upon increasing the concentration of the Gemini surfactant, meanwhile the formation of liquid crystal is observed.
- Anionic Gemini surfactant;Drop volume method;cmc;Aggregation number
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