Interaction between amphiphilic ionic liquid 1-butyl-3-methylimidazolium octyl sulfate and anionic polymer of sodium polystyrene sulfonate in aqueous medium

• Published in: Chemical physics letters Vol. 661; pp. 173 - 178
• Main Authors: Barhoumi, Z., Saini, M., Amdouni, N., Pal, A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 16-09-2016
• Subjects: 1-Butyl-3-methylimidazolium octylsulfate; Fluorescence probe; Polyelectrolyte/IL complex; Sodium polystyrene sulfonate; Surface tension; 1-Butyl-3-methylimidazolium octylsulfate; Surface tension; Fluorescence probe; Sodium polystyrene sulfonate; Polyelectrolyte/IL complex
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2016.08.016

[Display omitted]
•Surface tension, conductance and fluorescence studies of IL/NaPSS solutions have been carried out.•Calculation of standard free energy change ΔGm0, the standard enthalpy change ΔHm0, and standard entropy change ΔSm0.•The cmc of IL increases for various increasing NaPSS concentrations which results in complexation between IL and NaPSS.•The cmc of IL increases for increasing temperature at same concentration of NaPSS.
The micellization of an aqueous solution of the surface active ionic liquid (SAIL), 1-butyl-3-methylimidazolium octylsufate (C4mim)(C8OSO3) and its interaction with an anionic polymer sodium polystyrene sulfonate, (NaPSS) were studied using conductimetry, tensiometry and fluorimetry. Surface tension profile shows a more dramatic increase in the value of surface tension of aqueous (C4mim)(C8OSO3) before the critical micelle concentration (cmc) of IL. The critical micelle concentration (cmc) value of this surfactant was found out from conductance measurements. The thermodynamic parameters, i.e., Gibb’s free energy, enthalpy, and entropy of micellization of the IL in aqueous solution have been calculated. Behavior of fluorescence probe confirms the binding interactions between SAIL and the polyelectrolyte.