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

摘要： 以工业品壬基酚和多聚甲醛为原料,草酸为催化剂,合成二(2-羟基-5-壬基苯基)甲烷,经环氧乙烷加合合成二聚壬基酚聚氧乙烯醚(GNP),然后以氨基磺酸为磺化剂,以及氢氧化钠中和合成二聚壬基酚聚氧乙烯醚硫酸钠(GNPES)。以芘为荧光探针、二苯甲酮为猝灭剂,用稳态荧光探针法测定了合成的GNPES和壬基酚聚氧乙烯醚(NPES)的临界胶束浓度、不同表面活性剂浓度下的胶束聚集数。研究了亲水基团氧乙烯基团单元数变化对GNPES和NPES聚集性质的影响,考察了胶束聚集数的浓度效应。结果发现GNPES表面活性剂的临界胶束浓度比NPES表面活性剂的临界胶束浓度低一个数量级,显示了较好的表面活性,但在降低表面张力的能力方面GNPES表面活性剂相比,没有显著差别,基本上相同。随着亲水基团的增长,GNPES表面活性剂和NPES表面活性剂的临界胶束聚集数(Nm)明显增大,且GNPES表面活性剂临界胶束聚集数(N)的增大趋势要强于NPES表面活性剂。

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