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Molecular interactions at the metal-liquid interfaces.

Mathilde Orselly1, Julien Devémy2, Agathe Bouvet-Marchand1

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|June 22, 2022
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Molecular simulations reveal epoxy resin (DGEBA) and hardener (IPDA) adhesion on aluminum. This study provides thermodynamic insights into interfacial tensions and water droplet behavior on metal surfaces.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Computational Chemistry

Background:

  • Understanding adhesion is crucial for material performance.
  • Epoxy resins like diglycidyl ether of bisphenol A (DGEBA) and hardeners such as isophorone diamine (IPDA) are widely used.
  • Characterizing interfaces, especially metal-polymer interactions, is challenging.

Purpose of the Study:

  • To perform molecular simulations of water, DGEBA, and IPDA interactions on an aluminum surface.
  • To thermodynamically characterize the adhesion process by calculating interfacial tensions.
  • To predict water droplet behavior and understand solid-liquid interfacial tension.

Main Methods:

  • Molecular simulations were employed to model interactions.
  • Cross-interactions between aluminum and molecules were adjusted to match experimental adhesion work.
  • Liquid-vapor and solid-vapor surface tensions were calculated.

Main Results:

  • The study successfully reproduced experimental work of adhesion through simulation parameter adjustments.
  • Contact angles of water nanodroplets on the aluminum surface were predicted.
  • Key interfacial tensions, including solid-liquid, were determined.

Conclusions:

  • Molecular simulations offer a robust method for thermodynamic characterization of adhesion.
  • The findings provide critical data for optimizing epoxy-aluminum interfaces.
  • This work advances the understanding of interfacial phenomena in material science.