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Surface tension of functionalized MWCNT-based nanofluids in water and commercial propylene-glycol mixture
- Source :
- Journal of Molecular Liquids, Journal of Molecular Liquids, 2019, 293, pp.111473. ⟨10.1016/j.molliq.2019.111473⟩, Journal of Molecular Liquids, Elsevier, 2019, 293, pp.111473. ⟨10.1016/j.molliq.2019.111473⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- International audience; Nanofluids which consist of the addition of nanoparticles in a base fluid are envisaged for a large domain of applications. For many of them, the surface tension (ST) behavior of the prepared nanofluids is a key parameter to exploit their thermophysical properties. Due to their remarkable properties, carbon nanotubes (CNTs) are commonly used to develop nanofluids. However, the evolution of the ST of CNT-based nanofluids is still far from being understood and predictable. In the present work, two base fluids were used: water and a commercial mixture of propylene-glycol/water (around 40:60 wt%). The impact of the used multi-walled CNT (MWCNT) addition, MWCNT concentration (0.001 and 0.1 wt%) and temperature variation (273.15–333.15 K) on the density and ST evolution for the two kinds of CNT-based nanofluids is studied. The chemically modified MWCNTs are assumed to bear both localized hydrophilic areas due to grafted functional groups and remaining hydrophobic surfaces. The found difference in ST behavior between the two types of nanofluids is explained in light with the involved interfaces in each nanofluid. ST evolution is found to strongly depend on the CNT surface properties.
- Subjects :
- Work (thermodynamics)
Materials science
Base (chemistry)
Nanoparticle
02 engineering and technology
Carbon nanotube
010402 general chemistry
01 natural sciences
Polyvinyl alcohol
law.invention
Surface tension
Nanofluids
chemistry.chemical_compound
Nanofluid
Effect of concentration and base fluid
law
Materials Chemistry
[CHIM]Chemical Sciences
Physical and Theoretical Chemistry
Spectroscopy
chemistry.chemical_classification
MWCNT
[PHYS.MECA]Physics [physics]/Mechanics [physics]
021001 nanoscience & nanotechnology
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Chemical engineering
chemistry
Hydrophobic surfaces
0210 nano-technology
Chemical modification
Subjects
Details
- Language :
- English
- ISSN :
- 01677322
- Database :
- OpenAIRE
- Journal :
- Journal of Molecular Liquids, Journal of Molecular Liquids, 2019, 293, pp.111473. ⟨10.1016/j.molliq.2019.111473⟩, Journal of Molecular Liquids, Elsevier, 2019, 293, pp.111473. ⟨10.1016/j.molliq.2019.111473⟩
- Accession number :
- edsair.doi.dedup.....9d95c7ad57ce753628a5cd0775b0310e