Gemini阴离子表面活性剂水溶液的聚集性质  

Aggregation Properties of a New Anionic Gemini Surfactant in Aqueous Solution

作　　者：朱森[1] 程发[1] 郑宝江[1] 于九皋[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《物理化学学报》2004年第10期1245-1248,共4页Acta Physico-Chimica Sinica

摘　　要：合成了一种Gemini阴离子表面活性剂,测定了其临界胶束浓度cmc和cmc时的表面张力γcmc,与传统的单基表面活性剂相比,其临界胶束浓度降低了一个数量级,具有突出的降低水的表面张力的效率;研究了该种Gemini表面活性剂的浓度对于胶束聚集数的影响,结果表明,随着浓度的增加,胶束聚集数出现了一个极大值,同时观察到液晶微相的生成.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 goes through a maximum upon increasing the concentration of the Gemini surfactant, meanwhile the formation of liquid crystal is observed.

关 键 词：Gemini阴离子表面活性剂 水溶液 合成 聚集性质 临界胶束浓度 胶束聚集数 表面张力 

分 类 号：O647.1[理学—物理化学]