关键词: 二聚壬基酚聚氧乙烯醚硫酸钠 , 稳态荧光猝灭 , 临界胶束浓度 , 胶束聚集数

Abstract: The gemini sodium nonylphenol polyoxyethylene ether sulfate （GNPES ） was synthesized from nonylphenol， paraformaldehyde，ethylene oxide，sulfamic acid and aqueous sodium hydroxide by a three－step．Critical micelle concentration （CMC），micelle aggregation numbers at different surfactant concentrations and micellar micropolarity of GNPES and sodium nonylphenol polyoxyethylene ether sulfate （NPES） were individually determined by steady－state fluorescence probe method inwhich pyrene was used as fluorescence probe and benzophenone was used as quencher． The influence of the change of hydrophilic polyoxyethylene group of GNPES and NPES on the aggregation properties was studied respectively．The varieties of N with the concentration of GNPES and NPES were also discussed．The experimental results show that the CMC of GNPES reduce about one quantitative than the CMC of NPES，but the effect of redusing surface tension of GNPES and NPES is closely． When hydrophilic group is longer， Nm of GNPES surfactants and NPES surfactants increase，and the Nm's increasing trend of NPES is stronger than those of GNPES ．

Key words: Gemini sodium nonylphenol polyoxyethylene ether sulfate , Steady － state fluorescence quenching , Critical micelle concentration , Micelle aggregation number