Journal of New Technology and Materials
Volume 11, Numéro 2, Pages 23-28
2021-12-20

Mixed Surfactant System Sans Spectrum Modelisation



Authors : Belarbi Hayet . Bouanani Farida .

Abstract

In this work, small angle neutrons scattering (SANS) was exploited to investigate the inner structure of a mixed system containing: a nonionic fluorosurfactant (undecafluoro-n-pentyl-decaoxyethylene ether (C5F11(EO)10 (FSO-100)) and a cationic surfactant dodecyltrimethyl ammonium bromide(DTAB) on a wide range of spatial resolution, at 25 °C, and for 66% of DTAB. After correcting and normalizing of the scattered intensities, the data analysis indicates the coexistence of two populations, namely, homogeneous polydisperses spheres and stacked disc like micelles. This fitting model based on the coexistence of two kinds of micelles was used assuming either mixed micellization or segregation phenomena. The obtained results support some degree of micellar mixing but do not exclude completely the occurrence of an intra- or extra-micellar segregation. A predictive stacking parameter calculated for mixed system indicate a morphologic transformation.

Keywords

FSO-100/DTAB ; SANS ; mixed micelle ; fluorinated nonionic surfactant ; cationic surfactant ; bimodal distribution.

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