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Cationic Micelles in Deep Eutectic Solvents: Effects of Solvent Composition

Manasi, Iva ; King, Stephen M. and Edler, Karen j LU orcid (2024) In Faraday Discussions
Abstract
Deep eutectic solvents (DES) are mixtures of hydrogen bond donors and acceptors that form strongly hydrogen-bonded room temperature liquids. Changing the H-bonding components and their ratios can alter the physicochemical properties of deep eutectic solvents (DES). Recent studies have shown p-toluene sulfonic acid (pTSA) forms room temperature liquids with choline chloride (ChCl) at different molar ratios: 1:1, 1:2 and 2:1 [Rodriguez Rodriguez et al., ACS Sustainable Chemistry and Engineering, 2019, 7(4), 3940]. They also showed that the composition affects the physical properties of these liquids and their ability to dissolve metal oxides. In this work we evaluate the solubility and self-assembly of cationic surfactants alkyltrimethyl... (More)
Deep eutectic solvents (DES) are mixtures of hydrogen bond donors and acceptors that form strongly hydrogen-bonded room temperature liquids. Changing the H-bonding components and their ratios can alter the physicochemical properties of deep eutectic solvents (DES). Recent studies have shown p-toluene sulfonic acid (pTSA) forms room temperature liquids with choline chloride (ChCl) at different molar ratios: 1:1, 1:2 and 2:1 [Rodriguez Rodriguez et al., ACS Sustainable Chemistry and Engineering, 2019, 7(4), 3940]. They also showed that the composition affects the physical properties of these liquids and their ability to dissolve metal oxides. In this work we evaluate the solubility and self-assembly of cationic surfactants alkyltrimethyl ammonium bromides (CnTAB) in these pTSA/ChCl based liquids. CnTABs are insoluble in 1pTSA:2ChCl, whereas in 1pTSA:1ChCl and 2pTSA;1ChCl they form micelles. We characterise CnTAB (n=12, 14, 16) micelles using Small Angle Neutron Scattering and also look at interaction of water with the micelles. These studies help determine the interaction of DES components with the surfactant and the influence of varying pTSA and water ratios on these interactions. This provides potential for controlled surfactant templating and for tuning rheology modification in such systems. (Less)
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publication status
in press
subject
in
Faraday Discussions
publisher
Royal Society of Chemistry
ISSN
1359-6640
DOI
10.1039/D4FD00045E
language
English
LU publication?
yes
id
3e61e0f2-e63c-42ea-a6f7-9417ab9b0eca
alternative location
http://pubs.rsc.org/en/Content/ArticleLanding/2024/FD/D4FD00045E
date added to LUP
2024-05-27 11:32:48
date last changed
2024-05-28 10:54:44
@article{3e61e0f2-e63c-42ea-a6f7-9417ab9b0eca,
  abstract     = {{Deep eutectic solvents (DES) are mixtures of hydrogen bond donors and acceptors that form strongly hydrogen-bonded room temperature liquids. Changing the H-bonding components and their ratios can alter the physicochemical properties of deep eutectic solvents (DES). Recent studies have shown p-toluene sulfonic acid (pTSA) forms room temperature liquids with choline chloride (ChCl) at different molar ratios: 1:1, 1:2 and 2:1 [Rodriguez Rodriguez et al., ACS Sustainable Chemistry and Engineering, 2019, 7(4), 3940]. They also showed that the composition affects the physical properties of these liquids and their ability to dissolve metal oxides. In this work we evaluate the solubility and self-assembly of cationic surfactants alkyltrimethyl ammonium bromides (CnTAB) in these pTSA/ChCl based liquids. CnTABs are insoluble in 1pTSA:2ChCl, whereas in 1pTSA:1ChCl and 2pTSA;1ChCl they form micelles. We characterise CnTAB (n=12, 14, 16) micelles using Small Angle Neutron Scattering and also look at interaction of water with the micelles. These studies help determine the interaction of DES components with the surfactant and the influence of varying pTSA and water ratios on these interactions. This provides potential for controlled surfactant templating and for tuning rheology modification in such systems.}},
  author       = {{Manasi, Iva and King, Stephen M. and Edler, Karen j}},
  issn         = {{1359-6640}},
  language     = {{eng}},
  month        = {{03}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Faraday Discussions}},
  title        = {{Cationic Micelles in Deep Eutectic Solvents: Effects of Solvent Composition}},
  url          = {{http://dx.doi.org/10.1039/D4FD00045E}},
  doi          = {{10.1039/D4FD00045E}},
  year         = {{2024}},
}