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Morphology Modulation of Ionic Surfactant Micelles in Ternary Deep Eutectic Solvents

Atri, Ria S. ; Sanchez-Fernandez, Adrian LU orcid ; Hammond, Oliver S. ; Manasi, Iva ; Doutch, James ; Tellam, James P. and Edler, Karen J. (2020) In Journal of Physical Chemistry B 124(28). p.6004-6014
Abstract

Deep eutectic solvents (DES) are potentially greener solvents obtained through the complexation of simple precursors which, among other applications, have been investigated in recent years for their ability to support the self-assembly of amphiphilic molecules. It is crucial to understand the factors which influence surfactant solubility and self-assembly with respect to the interaction of the surfactant molecule with the DES components. In this work, small-angle neutron scattering (SANS) has been used to investigate the micellization of cationic (CnTAB) and anionic (SDS) surfactants in a ternary DES comprising choline chloride, urea, and glycerol, where the hydrogen bond donors are mixed in varying molar ratios. The results show that... (More)

Deep eutectic solvents (DES) are potentially greener solvents obtained through the complexation of simple precursors which, among other applications, have been investigated in recent years for their ability to support the self-assembly of amphiphilic molecules. It is crucial to understand the factors which influence surfactant solubility and self-assembly with respect to the interaction of the surfactant molecule with the DES components. In this work, small-angle neutron scattering (SANS) has been used to investigate the micellization of cationic (CnTAB) and anionic (SDS) surfactants in a ternary DES comprising choline chloride, urea, and glycerol, where the hydrogen bond donors are mixed in varying molar ratios. The results show that in each case either globular or rodlike micelles are formed with the degree of elongation being directly dependent on the composition of the DES. It is hypothesized that this composition dependence arises largely from the poor solubility of the counterions in the DES, especially at low glycerol content, leading to a tighter binding of the counterion to the micelle surface and giving rise to micelles with a high aspect ratio. This potential for accurate control over micelle morphology presents unique opportunities for rheology control or to develop templated syntheses of porous materials in DES, utilizing the solvent composition to tailor micelle shape and size, and hence the pore structure of the resulting material.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry B
volume
124
issue
28
pages
11 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:32551622
  • scopus:85088278197
ISSN
1520-6106
DOI
10.1021/acs.jpcb.0c03876
language
English
LU publication?
yes
id
8933c7a8-0d35-45b3-b061-5784da117268
date added to LUP
2021-01-08 14:30:23
date last changed
2024-05-16 01:17:43
@article{8933c7a8-0d35-45b3-b061-5784da117268,
  abstract     = {{<p>Deep eutectic solvents (DES) are potentially greener solvents obtained through the complexation of simple precursors which, among other applications, have been investigated in recent years for their ability to support the self-assembly of amphiphilic molecules. It is crucial to understand the factors which influence surfactant solubility and self-assembly with respect to the interaction of the surfactant molecule with the DES components. In this work, small-angle neutron scattering (SANS) has been used to investigate the micellization of cationic (CnTAB) and anionic (SDS) surfactants in a ternary DES comprising choline chloride, urea, and glycerol, where the hydrogen bond donors are mixed in varying molar ratios. The results show that in each case either globular or rodlike micelles are formed with the degree of elongation being directly dependent on the composition of the DES. It is hypothesized that this composition dependence arises largely from the poor solubility of the counterions in the DES, especially at low glycerol content, leading to a tighter binding of the counterion to the micelle surface and giving rise to micelles with a high aspect ratio. This potential for accurate control over micelle morphology presents unique opportunities for rheology control or to develop templated syntheses of porous materials in DES, utilizing the solvent composition to tailor micelle shape and size, and hence the pore structure of the resulting material.</p>}},
  author       = {{Atri, Ria S. and Sanchez-Fernandez, Adrian and Hammond, Oliver S. and Manasi, Iva and Doutch, James and Tellam, James P. and Edler, Karen J.}},
  issn         = {{1520-6106}},
  language     = {{eng}},
  number       = {{28}},
  pages        = {{6004--6014}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry B}},
  title        = {{Morphology Modulation of Ionic Surfactant Micelles in Ternary Deep Eutectic Solvents}},
  url          = {{http://dx.doi.org/10.1021/acs.jpcb.0c03876}},
  doi          = {{10.1021/acs.jpcb.0c03876}},
  volume       = {{124}},
  year         = {{2020}},
}