Skip to Main content Skip to Navigation
Journal articles

Graphene for Water-Based Nanofluid Preparation: Effect of Chemical Modifications on Dispersion and Stability

Abstract : Graphene, whatever its number of layers, is recognized for heat and thermal transfer ability. As it is widely known to be highly hydrophobic, its use in water-based nanofluid development requires first to improve both their dispersion and stability properties. Here, we have investigated several ways to chemically modify the surface properties of multi-layer graphene in order to increase their hydrophilic character. Chemical reactivity of graphene was deeply analyzed based on a multi-scale characterization using TEM, Raman spectroscopy and TGA-MS coupled technique. By optimizing and combining both covalent and non-covalent functionalization, stable graphene-based nanofluids under static conditions could be prepared with a straightforward approach. Moreover, we have investigated their flowing behavior. Contrary to graphene nanosheets strongly attacked by HNO3, under a gentler oxidation treatment using KMnO4, stability is well preserved under flowing conditions. Such high-stability nanofluids could help toward the practical use of graphene-based dispersions as heat transfer fluid in flowing systems.
Complete list of metadatas

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01524303
Contributor : Patrice Estellé <>
Submitted on : Wednesday, May 17, 2017 - 6:21:54 PM
Last modification on : Friday, July 10, 2020 - 4:19:53 PM

Identifiers

Citation

Eun Jeong Kim, Alexandre Desforges, Lucie Speyer, Jaafar Ghanbaja, Jérôme Gleize, et al.. Graphene for Water-Based Nanofluid Preparation: Effect of Chemical Modifications on Dispersion and Stability. Journal of Nanofluids, American Scientific Publishers, 2017, 6 (3), pp.603-613. ⟨10.1166/jon.2017.1353⟩. ⟨hal-01524303⟩

Share

Metrics

Record views

241