Structure and Dynamics of Nonionic Surfactant Aggregates in Layered Materials

Regis Guegan, Emmanuel Veron, Lydie Le Forestier, Makoto Ogawa, Sylvian Cadars

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The aggregation of surfactants on solid surfaces as they are adsorbed from solution is the basis of numerous technological applications such as colloidal stabilization, ore flotation, and floor cleaning. The understanding of both the structure and the dynamics of surfactant aggregates applies to the development of alternative ways of preparing hybrid layered materials. For this purpose, we study the adsorption of the triethylene glycol mono n-decyl ether (C10E3) nonionic surfactant onto a synthetic montmorillonite (Mt), an aluminosilicate clay mineral for organoclay preparation with important applications in materials sciences, catalysis, wastewater treatment, or as drug delivery. The aggregation mechanisms follow those observed in an analogous natural Mt, with the condensation of C10E3 in a bilayer arrangement once the surfactant self-assembles in a lamellar phase beyond the critical micelle concentration, underlining the importance of the surfactant state in solution. Solid-state 1H nuclear magnetic resonance (NMR) at fast magic-angle spinning (MAS) and high magnetic field combined with1H-13C correlation experiments and different types of 13C NMR experiments selectively probes mobile or rigid moieties of C10E3 in three different aggregate organizations: (i) a lateral monolayer, (ii) a lateral bilayer, and (iii) a normal bilayer. High-resolution 1H{27Al} CP-1H-1H spin diffusion experiments shed light on the proximities and dynamics of the different fragments and fractions of the intercalated surfactant molecules with respect to the Mt surface. 23Na and 1H NMR measurements combined with complementary NMR data, at both molecular and nanometer scales, precisely pointed out the location of the C10E3 ethylene oxide hydrophilic group in close contact with the Mt surface interacting through ion-dipole or van der Waals interactions.

Original languageEnglish
Pages (from-to)9759-9771
Number of pages13
JournalLangmuir
Volume33
Issue number38
DOIs
Publication statusPublished - 2017 Sep 26
Externally publishedYes

Fingerprint

Nonionic surfactants
Bentonite
Clay minerals
Surface-Active Agents
Surface active agents
surfactants
montmorillonite
Nuclear magnetic resonance
nuclear magnetic resonance
Agglomeration
Magnetic resonance measurement
Ethylene Oxide
Organoclay
minerals
Magic angle spinning
Critical micelle concentration
Aluminosilicates
Experiments
Materials science
flotation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Structure and Dynamics of Nonionic Surfactant Aggregates in Layered Materials. / Guegan, Regis; Veron, Emmanuel; Le Forestier, Lydie; Ogawa, Makoto; Cadars, Sylvian.

In: Langmuir, Vol. 33, No. 38, 26.09.2017, p. 9759-9771.

Research output: Contribution to journalArticle

Guegan, R, Veron, E, Le Forestier, L, Ogawa, M & Cadars, S 2017, 'Structure and Dynamics of Nonionic Surfactant Aggregates in Layered Materials', Langmuir, vol. 33, no. 38, pp. 9759-9771. https://doi.org/10.1021/acs.langmuir.7b01831
Guegan, Regis ; Veron, Emmanuel ; Le Forestier, Lydie ; Ogawa, Makoto ; Cadars, Sylvian. / Structure and Dynamics of Nonionic Surfactant Aggregates in Layered Materials. In: Langmuir. 2017 ; Vol. 33, No. 38. pp. 9759-9771.
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