The aggregation behaviors of two surfactants with the same hydrophobic tail, sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and sodium bis(2-ethylhexyl)phosphate (NaDEHP), have been investigated by the fluorescence technique and z-potential (ζ) measurements. Five fine peaks of the pyrene molecule fluorescence spectroscopy appear in the surfactant solution, and the micropolarity at which pyrene locates is monitored from the intensity ratio of the first (I1) and the third peak (I3). A wide peak around 475 nm, the emission spectra of the excimer of pyrene molecules, is observed in the NaDEHP solution, while this is not found for the AOT system. The value of I1/I3 decreases in a more limited concentration range for the AOT system than for NaDEHP, indicating that small aggregates can be more easily formed by NaDEHP molecules. The z-potential results for the aggregates formed by the two surfactants show that the interaction between AOT and PVP is stronger than that between NaDEHP and PVP.
Luan YX,Xu GY,Sun ZW,et al. Comparative studies of AOT and NaDEHP by fluorescence technique and z-potential (ζ) measurements[J]. Journal of Dispersion Science and Technology,2005,26,3,:285-290.
APA
Luan YX,Xu GY,孙祉伟,戴国亮,Chen YJ,&Yu L.(2005).Comparative studies of AOT and NaDEHP by fluorescence technique and z-potential (ζ) measurements.Journal of Dispersion Science and Technology,26(3),285-290.
MLA
Luan YX,et al."Comparative studies of AOT and NaDEHP by fluorescence technique and z-potential (ζ) measurements".Journal of Dispersion Science and Technology 26.3(2005):285-290.
; Sun ZW(孙祉伟)
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