Dispersing mechanism and tribological performance of vegetable oil-based CNT nanofluids with different surfactants

CNTs are commonly used nanoparticles in NMQL for their excellent heat transfer enhancement performance. However, winding and conglobation are constraints against their tribological performance, these constraints can be solved by surfactants. However, the influences of surfactant type and dispersing...

Full description

Saved in:
Bibliographic Details
Published in:Tribology international 2019-03, Vol.131, p.51-63
Main Authors: Gao, Teng, Li, Changhe, Zhang, Yanbin, Yang, Min, Jia, Dongzhou, Jin, Tan, Hou, Yali, Li, Runze
Format: Article
Language:English
Subjects:
CNT nanofluids
Coefficient of friction
Dispersants
Dispersion
Dispersion mechanism
Morphology
Nanofluids
Nanoparticles
Stability analysis
Surfactant
Surfactants
Tribological performance
Tribology
Vegetable oils
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:CNTs are commonly used nanoparticles in NMQL for their excellent heat transfer enhancement performance. However, winding and conglobation are constraints against their tribological performance, these constraints can be solved by surfactants. However, the influences of surfactant type and dispersing mechanism on the dispersion effect of CNTs have not been studied systemically. Consequently, this study analyzed the dispersing mechanism of different surfactants and evaluated the dispersion stability and tribological performances of PPO-based CNT nanofluids. Results showed that nanofluids with APE-10 obtain the highest viscosity, lowest friction coefficient, minimum roughness value and favorable surface morphology, thus indicating their excellent dispersion stability and tribological performance. Further, different experimental evaluations confirm that APE-10 is the optimal dispersant of CNT nanofluids. •The dispersing mechanism of different surfactants was analyzed.•Dispersivity and viscosity of CNTs nanofluids with diverse surfactants was discussed.•Tribological properties of CNTs nanofluids with diverse surfactants was evaluated.•Nanofluids with APE-10 obtained the optimal dispersivity and tribological properties.•The “synergism” of mixed surfactant brings excellent dispersion effect.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2018.10.025