Dynamic Viscosity of Purified Multi-Walled Carbon Nanotubes Water and Water-Propylene Glycol-Based Nanofluids

Samah Hamze (1) , Nawal Berrada (2) , Alexandre Desforges (2) , Brigitte Vigolo (2) , Jerome Gleize (2) , Jaafar Ghanbaja (2) , Thierry Mare (1) , David Cabaleiro (1, 3) , Patrice Estellé (1)

1 LGCGM - Laboratoire de Génie Civil et Génie Mécanique
2 IJL - Institut Jean Lamour
3 Universidade de Vigo

We report in this study the experimental investigation of the dynamic viscosity of purified multi-walled carbon nanotubes (MWCNT) water and water-propylene glycol-based nanofluids in the temperature range 10-80 degrees C. Four weight concentrations of MWCNTs are considered, between 0.005 and 0.1 wt.%. Triton X-100, a common nonionic surfactant, is used to disperse the nanotubes and stabilize the nanofluids as evidenced by optical characterization. Purified and non-damaged MWCNTs are used for nanofluid preparation by the two-step method. MWCNT characterization is deeply investigated from a set of complementary techniques such as thermogravimetric analysis, transmission electron microscopy, and Raman spectroscopy. The studied nanofluids behave as Newtonian fluids for low nanotube content while a shear-thinning behavior is noticed for higher concentration. Finally, the viscosity enhancement of nanofluids with MWCNT loading is compared to the modified Maron-Pierce model considering the presence of aggregates and their size obtained from optical observations.

Mots clés: MWCNTs; water-based nanofluids; dynamic viscosity; effect of temperature and concentration

Domaines: Sciences de l'ingénieur [physics]

Samah Hamze, Nawal Berrada, Alexandre Desforges, Brigitte Vigolo, Jerome Gleize, et al.. Dynamic Viscosity of Purified Multi-Walled Carbon Nanotubes Water and Water-Propylene Glycol-Based Nanofluids. Heat Transfer Engineering, 2021, 42 (19-20), pp.1663-1674. ⟨10.1080/01457632.2020.1818382⟩. ⟨hal-02958233⟩