摘要
以芘为荧光探针、二苯甲酮为猝灭剂,采用稳态荧光探针法测定了3种不同结构的脂肪醇聚氧乙烯醚(FAPE)表面活性剂增溶芘后的稳态荧光光谱,建立了FAPE非离子表面活性剂的临界胶束浓度(CMC)和临界胶束聚集数(Nm)的测试方法。确定了荧光探针芘的适宜浓度Cp为6×10-6 mol/L,猝灭剂的适宜浓度CQ取0.06～0.12mmol/L,根据I336/I394与FAPE浓度变化的关系,可得到直链、支链、芳香族的脂肪醇聚氧乙烯醚的临界胶束浓度分别为0.2mmol/L、0.1mmol/L、0.05mmol/L。直链、支链、芳香族的脂肪醇聚氧乙烯醚的临界胶束聚集数依次为1168、255、6.0。结果表明,同系列非离子表面活性剂,不同碳链结构呈现出由直链→支链→芳香族,以及临界胶束浓度和聚集数依次减小的趋势。
Taken the pyrene as the fluorescence probe and diphenyl ketone as quencher, three different structure fatty alcohol-polyoxyethylene ether（FAPE） surfactants of steady-state fluorescence spectrum were determined by fluo- rescence probe method. A kind of method about FAPE surfactant of critical micelle concentration（CMC） and critical micelle aggregation number（Nm） was established. Ensure the proper concentration of fluorescence probe is 6 ×10^-6 mol/L, the proper concentration range of quencher is 0.06-0. 12mmol/L. According to relationship fluorescence intensity ratio of pyrene I336/I39. with surfactant concentration of aqueous solution. CMC values for stright-chain, branched-chain, aromatics alcohol ether were 0. 2mmol/L, 0.1ol/L, 0. 05mmol/L, respectively, Nm values for stright-chain, branched-chain, aromatics alcohol ether were 1168,255,6.0. The experimental results showed that the FAPE series nonionic surfactant, critical micelle concentration and micelle aggregation number decrease as carbon chain structure from straight-chain→ branched-chain→aromatics.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2012年第4期70-73,86,共5页
Materials Reports
基金
国家自然基金(20976105)
上海市教委科技创新重点项目(11ZZ179)
上海市教委重点学科建设(J51503)
上海市教委科研创新项目(09YZ387)
上海市科学技术委员会课题(09QT1400600)
关键词
荧光探针法
临界胶束浓度
胶束聚集数
脂肪醇聚氧乙烯醚
fluorescence probe method, critical micelle concentration, micelle aggregation number, fatty alcohol-polyoxyethylene ether（FAPE）
