Surface activity, self-aggregation and antimicrobial activity of catanionic mixtures of surface active imidazolium- or pyridinium-based ionic liquids and sodium bis(2-ethylhexyl) sulfosuccionate
| Autor: | M. Teresa Garcia, Francesc Comelles, Juan José González, Isabel Ribosa |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España), García Ramón, María Teresa [0000-0001-9967-3472 ], Comelles, Francesc [0000-0003-2122-4612], García Ramón, María Teresa, Comelles, Francesc |
| Rok vydání: | 2020 |
| Předmět: |
02 engineering and technology
010402 general chemistry 01 natural sciences chemistry.chemical_compound Adsorption Pulmonary surfactant Surface-active ionic liquid Catanionic mixtures Polymer chemistry Amphiphile Materials Chemistry AOT Physical and Theoretical Chemistry Spectroscopy Alkyl chemistry.chemical_classification Interfacial properties Aqueous solution Vesicle Vesicles antimicrobial activity 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Ionic liquid Pyridinium 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2020.112637 |
| Popis: | The surface activity and spontaneous formation of vesicles in aqueous solution of catanionic mixtures composed of different surface active ionic liquids (SAILs), methylimidazolium- or pyridinium-based, non-functionalized or bearing an ester or amide group in the alkyl chain, and the anionic surfactant sodium bis(2-ethyl-1-hexyl) sulfosuccinate (Na-AOT) have been studied. Furthermore, the antimicrobial activity of these catanionic mixtures against bacteria and fungi has been investigated. Catanionic mixtures were prepared by mixing aqueous solutions of SAIL-Br and Na-AOT in equimolar ratio. The resulting SAIL-AOT catanionic surfactant mixtures aggregate in vesicles and display high surface activity, enhanced interfacial adsorption and low critical aggregation concentration (cac) as compared to the individual components. The critical aggregation concentration decreases with the elongation of the alkyl chain of the ionic liquid and, for the same chain length, the cac values of SAIL-AOT mixtures follow the order, non-functionalized > amide functionalized > ester functionalized. The zeta-potential of SAIL-AOT vesicles increases from negative to positive values with the alkyl chain lengthening, consistently with the composition of the aggregates determined by the Regular Solution Theory. The vesicle formation in SAIL-AOT catanionic mixtures affects the intrinsic antimicrobial activity of individual amphiphilic components. The catanionic mixtures investigated exhibit high antimicrobial activity against fungi and most Gram-positive bacteria and low toxicity to Gram-negative microorganisms. The authors thank the Spanish Ministry of Economia y Competitividad (CTQ2017-88948-P) for financial support. |
| Databáze: | OpenAIRE |
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