Can sodium 1-alkylsulfonates participate in the sodium dodecyl sulfate micelle formation?

Ola Grabowska; Krzysztof Żamojć; Michał Olewniczak; Lech Chmurzynski; Dariusz Wyrzykowski

doi:10.1016/j.molliq.2023.121568

Can sodium 1-alkylsulfonates participate in the sodium dodecyl sulfate micelle formation?

Abstract

The aggregation behavior of sodium dodecyl sulfate (SDS) was studied in an aqueous solution in the presence of increasing concentrations of selected sodium 1-alkylsulfonates, namely sodium 1-octanesulfonate, sodium 1-decanesulfonate, and sodium 1-dodecanesufonate. The critical micelle concentration (CMC) of SDS was determined by conductivity and fluorescence intensity measurements. The steady-state fluorescence quenching experiments with pyrene as a fluorescent probe were performed to obtain micellar aggregation numbers (Nagg) of the surfactant. The thermodynamic parameters of micellization ( for all studied systems; and for sodium 1-dodecanesufonate) have been determined and compared. The influence of alkyl chain length and concentration of the selected sodium 1-alkylsulfonates on the values of CMC, Nagg, , , and of SDS has been discussed. As it was found, all selected for the experiments electrolytes decrease significantly the CMC of the surfactant, while an opposite effect is observed for Nagg values. The obtained experimental results have been supported by theoretical calculations. Interestingly, it has been proven that solely the molecules of sodium 1-dodecanesufonate (of the same carbon chain length) may act as the SDS mimetics – they are not recognized by SDS as the ones with a different structure and consequently are allowed to participate in the formation of the surfactant’s micelles.

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Authors (5)

Ola Grabowska
Krzysztof Żamojć
Michał Olewniczak
Lech Chmurzynski
Dariusz Wyrzykowski

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Keywords

SODIUM DODECYL SULFATE SODIUM 1-ALKYLSULFONATES CRITICAL MICELLE CONCENTRATION MICELLAR AGGREGATION NUMBER THERMODYNAMIC PARAMETERS FLUORESCENCE SPECTROSCOPY CONDUCTIVITY MOLECULAR DYNAMICS

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Category:

Articles

Type:

artykuły w czasopismach

Published in:

JOURNAL OF MOLECULAR LIQUIDS no. 377,
ISSN: 0167-7322

Language:

English

Publication year:

2023

Bibliographic description:

Grabowska O., Żamojć K., Olewniczak M., Chmurzynski L., Wyrzykowski D.: Can sodium 1-alkylsulfonates participate in the sodium dodecyl sulfate micelle formation?// JOURNAL OF MOLECULAR LIQUIDS -Vol. 377, (2023), s.121568-

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