Imidazolium-based zwitterionic surfactants: characterization of normal and reverse micelles and stabilization of nanoparticles

Langmuir : the ACS Journal of Surfaces and Colloids
Franciane D SouzaFaruk Nome

Abstract

This paper presents the physicochemical properties of micellar aggregates formed from a series of zwitterionic surfactants of the type 3-(1-alkyl-3-imidazolio)propane-sulfonate (ImS3-n), with n = 10, 12, 14, and 16. The ImS3-n dipolar ionic surfactants represent a versatile class of dipolar ionic compounds, which form normal and reverse micelles. Furthermore, they are able to stabilize nanoparticles in water and in organic media. Aqueous solubility is too low at room temperature to allow characterization of micellar aggregates but increases with addition of salts, allowing determination of aggregation number and cmc. As expected, these parameters depend on the length of the alkyl chain, and cmc values follow Klevens equation. In the presence of NaClO4, all ImS3-n micelles become anionoid by incorporating ClO4(-) on the micellar interface. A special feature of these surfactants is the ability to form reverse micelles and solubilize copious amounts of saline solutions in chloroform. (1)H NMR and infrared spectroscopic evidence showed that the maximum water to surfactant molar ratio w0 achievable depends on the concentration and type of salt dissolved. Reverse micelles of the ImS3-n surfactants can be used to stabilize metallic na...Continue Reading

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Citations

Jan 12, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Matteo TieccoGianluigi Cardinali
Apr 12, 2016·Advances in Colloid and Interface Science·Avinash BhadaniMasahiko Abe
Sep 12, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Iago A ModenezCaterina G C Marques Netto
Jul 3, 2021·Materials·Hernán CortésGerardo Leyva-Gómez
Dec 4, 2019·Journal of Chemical Information and Modeling·Laura MortaraFilipe S Lima

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