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Cited by 27Surfactants and Colloidal SystemsEnvironmental Chemistry and AnalysisElectrostatics and Colloid Interactions

The effects of alkylammonium counterions on the aggregation of fluorinated surfactants and surfactant ionic liquids

Pottage, Matthew J., Greaves, Tamar L., Garvey, Christopher J., Tabor, Rico F.·2016·Journal of Colloid and Interface Science
DOI 10.1016/j.jcis.2016.04.039
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Abstract

The effects of organic counterions with varying carbon number on surfactant aggregation have been analysed by coupling perfluorooctanoate surfactant anions with various alkylammonium counterions. Both the degree of substitution (primary to tertiary) and alkyl chain length (0-3 carbons) of the counterions were varied to provide a comprehensive matrix of geometries and lipophilicities. Surface activity was measured using pendant drop tensiometry, while temperature-controlled small-angle neutron scattering was used to probe changes in aggregation morphology. It was found that the use of such alkylammonium counterions resulted in a strong preference for bilayer formation even at low surfactant concentration (<2wt%), when compared to simple inorganic counterions such as sodium which favour near-spherical micelles. At increased temperatures, some counterions led to unique phase behaviour wherein a transition between two structurally different lamellar phases is seen, rationalised as a transition into a microscopic phase separation wherein a surfactant-rich lamellar phase coexists with a dilute micellar phase. The results indicate that aggregation is controlled by a delicate balance of counterion size, hydrophilicity and diffuseness of charge, providing new methods for the subtle control of surfactant solutions.

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  • Self-assembled micelles can have various structures such as spheres, cylinders, lamellar, and vesicles based on the characteristics of the medium, length of chain, and temperature.

    “Self-assembled micelles can have various structures such as a sphere, cylinders, lamellar, and vesicles based on the characteristics of the medium, length of chain, and temperature (Figure 2) [9,34,35].”

    From Recent Advances in Nanomicelles Delivery Systems. (2020) · cites this paper as [35]

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Authors
Pottage, M. J., Greaves, T. L., Garvey, C. J., & Tabor, R. F.
Affiliations
  • Monash University (AU)
  • RMIT University (AU)
  • Australian Nuclear Science and Technology Organisation (AU)
Corresponding author
Tabor, Rico F.
ORCID
Venue
Journal of Colloid and Interface Science
Publisher
Elsevier BV
Published
2016-08
Volume
475
Pages
72-81
ISSN
0021-9797 (ISSN-L)
DOI
10.1016/j.jcis.2016.04.039
OpenAlex
W2345328154
Cited by
27
References
48
Citations by year
2026: 3 · 2025: 2 · 2023: 2 · 2022: 7 · 2021: 3 · 2020: 3 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 2
FWCI
1.07
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Journal of Colloid and Interface Science (publishedVersion)
  • PubMed (publishedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion)
Funders
  • 3M Corporation
  • Victorian Government
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Surfactants and Colloidal Systems
  • Physical Sciences › Environmental Science › Environmental Chemistry › Environmental Chemistry and Analysis
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Electrostatics and Colloid Interactions
Keywords
fluorinated surfactants, perfluorooctanoic acid, surfactant self-assembly, bilayer formation, lamellar phase, micelles, counterion size, phase separation, aggregation morphology, surface activity

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