The effect of solvent and counterion variation on inverse micelle CMCs in hydrocarbon solvents

Gregory N. Smith; Paul Brown; Craig James; Sarah E. Rogers; Julian Eastoe

doi:10.1016/j.colsurfa.2016.01.020

The effect of solvent and counterion variation on inverse micelle CMCs in hydrocarbon solvents

Gregory N. Smith, Paul Brown, Craig James, Sarah E. Rogers, Julian Eastoe^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

16 Citations (Scopus)

332 Downloads (Pure)

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.

Original language	English
Pages (from-to)	194-200
Number of pages	7
Journal	Colloids and Surfaces A. Physicochemical and Engineering Aspects
Volume	494
Early online date	16 Jan 2016
DOIs	https://doi.org/10.1016/j.colsurfa.2016.01.020
Publication status	Published - 5 Apr 2016

Keywords

Inverse micelles
Nonpolar solvents
Small-angle neutron scattering

Access to Document

10.1016/j.colsurfa.2016.01.020

Full-text PDF (accepted author manuscript)
This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at http://www.sciencedirect.com/science/article/pii/S0927775716300231. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 595 KBLicence: CC BY-NC-ND

Link to publication in Scopus

Fingerprint Dive into the research topics of 'The effect of solvent and counterion variation on inverse micelle CMCs in hydrocarbon solvents'. Together they form a unique fingerprint.

Cite this

@article{167710faa5354ef1b9867e215f4e3cab,

title = "The effect of solvent and counterion variation on inverse micelle CMCs in hydrocarbon solvents",

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.",

keywords = "Inverse micelles, Nonpolar solvents, Small-angle neutron scattering",

author = "Smith, {Gregory N.} and Paul Brown and Craig James and Rogers, {Sarah E.} and Julian Eastoe",

year = "2016",

month = apr,

day = "5",

doi = "10.1016/j.colsurfa.2016.01.020",

language = "English",

volume = "494",

pages = "194--200",

journal = "Colloids and Surfaces A. Physicochemical and Engineering Aspects",

issn = "0927-7757",

publisher = "Elsevier",

}

TY - JOUR

T1 - The effect of solvent and counterion variation on inverse micelle CMCs in hydrocarbon solvents

AU - Smith, Gregory N.

AU - Brown, Paul

AU - James, Craig

AU - Rogers, Sarah E.

AU - Eastoe, Julian

PY - 2016/4/5

Y1 - 2016/4/5

N2 - 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.

AB - 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.

KW - Inverse micelles

KW - Nonpolar solvents

KW - Small-angle neutron scattering

UR - http://www.scopus.com/inward/record.url?scp=84956600061&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2016.01.020

DO - 10.1016/j.colsurfa.2016.01.020

M3 - Article (Academic Journal)

AN - SCOPUS:84956600061

VL - 494

SP - 194

EP - 200

JO - Colloids and Surfaces A. Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A. Physicochemical and Engineering Aspects

SN - 0927-7757

ER -