Rheological non-Newtonian behaviour of ethylene glycol-based Fe(2)O(3 )nanofluids

The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped α-Fe(2)O(3 )(hematite) nanoparticles at 303.15 K and particle weight concentrations up to 25% has been carried out using a cone-plate Physica MCR rheometer. The tests performed show that the studi...

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Detalles Bibliográficos
Autores principales: Pastoriza-Gallego, María Jose, Lugo, Luis, Legido, José Luis, Piñeiro, Manuel M
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2011
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3214201/
https://www.ncbi.nlm.nih.gov/pubmed/22027018
http://dx.doi.org/10.1186/1556-276X-6-560
Descripción
Sumario:The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped α-Fe(2)O(3 )(hematite) nanoparticles at 303.15 K and particle weight concentrations up to 25% has been carried out using a cone-plate Physica MCR rheometer. The tests performed show that the studied nanofluids present non-Newtonian shear-thinning behaviour. In addition, the viscosity at a given shear rate is time dependent, i.e. the fluid is thixotropic. Finally, using strain sweep and frequency sweep tests, the storage modulus G', loss modulus G″ and damping factor were determined as a function of the frequency showing viscoelastic behaviour for all samples.

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