Characterization of air/water interface adsorption of a series of partially fluorinated/hydrogenated quaternary ammonium salts
| Autor: | Lino Conte, Thierry Darmanin, Sonia Amigoni, Gennifer Padoan, Alessandro Zaggia, Frédéric Guittard |
|---|---|
| Přispěvatelé: | Surfaces & Interfaces, Laboratoire de physique de la matière condensée (LPMC), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Universita degli Studi di Padova |
| Rok vydání: | 2015 |
| Předmět: |
Inorganic chemistry
Substituent chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Krafft temperature Inorganic Chemistry Surface tension symbols.namesake chemistry.chemical_compound Gibbs isotherm Adsorption Pulmonary surfactant Environmental Chemistry Physical and Theoretical Chemistry Surfactant Fluorinated Ammonium Interface Organic Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Critical micelle concentration symbols Fluorine 0210 nano-technology |
| Zdroj: | Journal of Fluorine Chemistry Journal of Fluorine Chemistry, Elsevier, 2015, 178, pp.241-248. ⟨10.1016/j.jfluchem.2015.07.023⟩ |
| ISSN: | 0022-1139 |
| DOI: | 10.1016/j.jfluchem.2015.07.023 |
| Popis: | International audience; The adsorption at air/water interface of a series of partially fluorinated/hydrogenated quaternary ammonium salts was characterized by the determination of static and dynamic surface tension, critical micelle concentration, surface excess, area per molecule and Krafft temperature. In particular, the variation of these parameters was studied as a function of fluorinated and hydrogenated chain length.Modification of fluorinated and hydrogenated moieties allows to finely tune all the aforementioned physical surface properties: increasing the number of fluorinated carbon atoms boosts both effectiveness and efficiency of surfactant in reducing surface tension, kinetics of migration to interface are favored fastening reaching of equilibrium conditions, critical micelle concentration is reduced and surface excess is increased. Conversely increasing the length of the hydrogenated moiety reduces both effectiveness and efficiency of surfactant, migration to interface is slackened, c.m.c. is increased, and surface excess is depresses. Area per molecule and Krafft temperature appear to be affected mainly by the total number of carbon atoms introduced in the molecules whatever the nature of the substituent (fluorine or hydrogen). |
| Databáze: | OpenAIRE |
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