Physicochemical characterisation of graphene-ammonium lactate ionic liquid nanofluid
نویسندگان
چکیده
A new series of nanofluids based on graphene dispersed in 2-hydroxyethylammonium lactate (ML) ionic liquid was developed. Concentrations 0.1, 0.5 and 1 wt% were studied these dispersions stable after 2 months. Raman spectra showed a strong interaction between ML graphene. The effect the concentration temperature viscoelastic behaviour conductivity studied. An unexpected decrease viscosity found with low due to suppression hydrogen bonding liquid. Shear thinning effects appeared higher concentrations Ostwald Herschel-Bulkley equations used describe steady-state results. Creep-recovery tests also performed, data fitted complex Burgers model for nanofluid graphene, 47 % elastic response. complexity related presence different molecular arrangements nanofluid. enhancement observed increasing values concentration. electrical successfully modelled by using both Vogel-Fulcher-Tammann Power Law equations. Electrochemical characterisation at room carried out, finding an irreversible oxidation V only highest (1 wt%). percolation estimated range
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ژورنال
عنوان ژورنال: Journal of Molecular Liquids
سال: 2022
ISSN: ['0167-7322', '1873-3166']
DOI: https://doi.org/10.1016/j.molliq.2022.120446