Smith, G.N. orcid.org/0000-0002-0074-5657, Brown, P., James, C. et al. (2 more authors) (2016) The effect of solvent and counterion variation on inverse micelle CMCs in hydrocarbon solvents. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 494. pp. 194-200. ISSN 0927-7757
Abstract
Critical micelle concentrations (CMCs) for the formation of inverse micelles have been determined for anionic surfactants in nonpolar, hydrocarbon solvents. Sodium dioctylsulfosuccinate (Aerosol OT or AOT) was chosen as the model surfactant, with systematic variations in both the solvent (benzene, cyclohexane, and dodecane) and the surfactant counterion (sodium and tetrapropylammonium). Recent work (Langmuir 29 (2013) 3352–3258) has shown that high-resolution small-angle neutron scattering (SANS) measurements can be used to directly determine the presence or absence of aggregates in solution. No variation in the value of the CMC was found within the resolution of the measurements for changing either solvent or counterion; some effects on the structure of inverse micelles were observed. This lack of a significant difference in the onset of inverse micellization with changes to the molecular species is surprising, and the implications on the solvophobic effect in nonpolar solvents are discussed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Elsevier B.V. All rights reserved. This is an author produced version of a paper subsequently published in Colloids and Surfaces A: Physicochemical and Engineering Aspects. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | Nonpolar solvents; Inverse micelles; Small-angle neutron scattering |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 07 Apr 2016 15:04 |
Last Modified: | 01 Oct 2019 14:44 |
Published Version: | http://dx.doi.org/10.1016/j.colsurfa.2016.01.020 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.colsurfa.2016.01.020 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:97618 |