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PISÁRČIK, M. JAMPÍLEK, J. DEVÍNSKY, F. DRÁBIKOVÁ, J. TKACZ, J. OPRAVIL, T.
Original Title
Gemini Surfactants with Polymethylene Spacer: Supramolecular Structures at Solid Surface and Aggregation in Aqueous Solution
Type
journal article in Web of Science
Language
English
Original Abstract
Aggregation of α,ω-bisammonium cationic gemini surfactants with a variable polymethylene spacer and two dodecyl chains has been studied on a solid surface and in aqueous solution. Scanning electron microscopy and dynamic light scattering with the time-resolved fluorescence quenching technique were used for the experiments on the solid surface and in aqueous solution, respectively. As the results from the scanning electron microscopy indicate, the morphology of supramolecular structures of gemini surfactants at the solid surface depends on the spacer length. In aqueous solution, gemini surfactants with spacers consisting of 4, 6, 8, 10, and 12 CH2 groups form spherical micelles with diameters between 2 and 3.5 nm. Micelles of gemini surfactant with a short ethylene spacer show an increase in size up to 13 nm at the maximum concentration investigated. The aggregation number of micelles determined by time resolved fluorescence quenching was found to be in the range 14–25 for the spacer lengths from 6 to 12 CH2 groups with only a moderate increase with surfactant concentration. For micelles of gemini surfactants with the short ethylene spacer, the increase of the aggregation number up to 50 at the maximum concentration was observed. The findings support micellar growth of gemini surfactants with short ethylene spacer.
Keywords
Cationic surfactants, Gemini surfactants, Dynamic light scattering, Time-resolved fluorescence quenching, Scanning electron microscopy
Authors
PISÁRČIK, M.; JAMPÍLEK, J.; DEVÍNSKY, F.; DRÁBIKOVÁ, J.; TKACZ, J.; OPRAVIL, T.
Released
25. 2. 2016
Publisher
Journal of Surfactants and Detergents
ISBN
1097-3958
Periodical
JOURNAL OF SURFACTANTS AND DETERGENTS
Number
1
State
United States of America
Pages from
Pages to
10
Pages count
URL
http://link.springer.com/article/10.1007%2Fs11743-016-1797-8
BibTex
@article{BUT122832, author="Martin {Pisárčik} and Josef {Jampílek} and Ferdinand {Devínsky} and Juliána {Drábiková} and Jakub {Tkacz} and Tomáš {Opravil}", title="Gemini Surfactants with Polymethylene Spacer: Supramolecular Structures at Solid Surface and Aggregation in Aqueous Solution", journal="JOURNAL OF SURFACTANTS AND DETERGENTS", year="2016", number="1", pages="1--10", doi="10.1007/s11743-016-1797-8", issn="1097-3958", url="http://link.springer.com/article/10.1007%2Fs11743-016-1797-8" }