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- Title
Experimental investigation of the rheological behavior and viscosity of decorated multi-walled carbon nanotubes with TiO nanoparticles/water nanofluids.
- Authors
Abbasi, Sedigheh; Zebarjad, Seyed; Baghban, Seyed; Youssefi, Abbas; Ekrami-Kakhki, Mehri-Saddat
- Abstract
The effects of temperature and concentration on the flow behavior and viscosity of nanofluids containing TiO nanoparticles, pristine MWCNTs, oxidized MWCNTs and decorated MWCNTs with TiO nanoparticles are experimentally investigated. The results of rheological characteristics of nanofluids revealed that nanofluid of TiO nanoparticle and MWCNT-TiO exhibits shear thickening or dilatant behavior. In contrast, nanofluids containing pristine and oxidized MWCNTs depict the shear thinning or pseudoplastic behavior. Also results demonstrated that the rheological characteristics of nanofluids are functions of temperature and concentration, whereas the viscosity of all prepared nanofluids decreases with increasing the temperature and decreasing the concentration. In addition, the results show that the oxidation of MWCNTs in nitric acid leads to the reduction in viscosity. The rheological behavior of decorated MWCNTs illustrates that viscosity decreases by increasing the attached TiO nanoparticles. TEM results show that TiO nanoparticles successfully attached to the outer surface of oxidized MWCNTs.
- Subjects
RHEOLOGY; VISCOSITY; MULTIWALLED carbon nanotubes; TITANIUM dioxide nanoparticles; NANOFLUIDS
- Publication
Journal of Thermal Analysis & Calorimetry, 2016, Vol 123, Issue 1, p81
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-015-4878-4