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Updated: Aug 13, 2025

Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
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Long-term stable solid concentrated graphene dispersion assisted by a highly aromatic ionic liquid.

Soha Aldroubi1, Eric Anglaret2, Ibrahim Bou Malham3

  • 1ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France; Laboratoire Energétique et Réactivité à l'Echelle Nanométrique (EREN), Faculté des Sciences IV, Université Libanaise, Haouch el-Omara, 1801 Zahlé, Liban.

Journal of Colloid and Interface Science
|January 21, 2023
PubMed
Summary

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Heterogeneous Decoration of Ionic Mesopores by Ionic and Poly(Ionic) Liquids.

ACS applied materials & interfaces·2025
This summary is machine-generated.

New ionic liquids enable stable, high-concentration graphene production via sonochemical exfoliation. This breakthrough offers a versatile method for creating advanced graphene materials with long-term stability.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Sonochemical exfoliation is a promising method for graphene production.
  • Traditional organic solvents yield unstable, low-concentration graphene dispersions.
  • Ionic liquids (ILs) offer a safer, more versatile alternative to organic solvents for graphene synthesis.

Purpose of the Study:

  • To investigate the role of aromatic groups in imidazolium cations for graphite exfoliation.
  • To develop stable, high-concentration graphene dispersions using novel ionic liquids.
  • To overcome the limitations of room-temperature liquid dispersions in previous studies.

Main Methods:

  • Preparation of four highly aromatic imidazolium-based ionic liquids (ILs).
  • Sonochemical exfoliation of graphite using these ILs.
Keywords:
GrapheneGraphite exfoliationImidazoliumIonic liquidSolid dispersionSonochemical exfoliation

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  • Comparison with a commercial benchmark IL, [Bmim][NTf2].
  • Characterization of graphene dispersion stability, concentration, and properties.

    • Main Results:

    • A novel IL, [(Np)(Bn)im][NTf2], produced solid graphene dispersions at room temperature.
    • These dispersions exhibited long-term stability (up to 2 years) and high concentration (3.6 mg/mL).
    • The graphene sheets were characterized as thin few-layer graphene.
    • The solid dispersions could be easily processed into liquid form by heating above 60°C.

    Conclusions:

    • Highly aromatic imidazolium-based ILs, particularly [(Np)(Bn)im][NTf2], are effective for producing stable, high-concentration graphene dispersions.
    • This method overcomes the limitations of previous studies by enabling solid-state dispersions with excellent processability.
    • The findings pave the way for practical applications of graphene materials requiring long-term stability and ease of handling.