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Influence of Deep Eutectic Solvent Composition on Micelle Properties: A Molecular Dynamics Study.

Iuliia V Voroshylova1, Elisabete S C Ferreira1, M Natália D S Cordeiro1

  • 1REQUIMTE LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal.

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Summary

Molecular dynamics simulations reveal how surfactant micelles behave in deep eutectic solvents (DESs). Micelle shape and mobility depend on the specific DES, impacting applications like drug delivery and nanomaterial templating.

Keywords:
EthalineGlycelineMD simulationsRelinecetyltrimethylammonium bromidehydrogen bondingmicellesodium dodecyl sulfatesulfobetainesurfactant

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Computational Chemistry

Background:

  • Deep eutectic solvents (DESs) offer tunable properties for various chemical applications.
  • Understanding surfactant micelle behavior in DESs is crucial for optimizing their use.
  • Surfactant-solvent interactions influence system structure, dynamics, and function.

Purpose of the Study:

  • To investigate the structural and transport properties of SDS, CTAB, and SB3-12 micelles in Ethaline, Glyceline, and Reline DESs.
  • To elucidate the impact of DES composition on micelle morphology, interactions, and dynamics.
  • To correlate micelle behavior with potential applications in electrodeposition, nanomaterial templating, and drug delivery.

Main Methods:

  • Utilized molecular dynamics (MD) simulations to model micelle systems.
  • Performed structural analyses including eccentricity and radius of gyration.
  • Analyzed radial distribution functions and hydrogen bonding to assess interactions.
  • Investigated transport properties, focusing on diffusion coefficients.

Main Results:

  • Micelle shape and compactness varied significantly across different DESs (Ethaline, Glyceline, Reline).
  • SDS micelles showed strong interactions with hydrogen bond donor components, while SB3-12 micelles exhibited self-interaction.
  • Micelles minimally disrupted the DES hydrogen bond network, with SB3-12 forming the most hydrogen bonds.
  • Larger micelles decreased diffusion coefficients, whereas smaller micelles enhanced DES component mobility.

Conclusions:

  • The study provides fundamental insights into micelle formation and behavior within diverse DES environments.
  • Findings highlight the tunability of DES-surfactant systems for targeted applications.
  • Results pave the way for optimizing DES-surfactant systems in areas like electrodeposition and drug delivery.