Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear

The rheological properties of diamond (< 10 nm) in silicone oil (PDMS) were analyzed using steady shear and oscillatory shear measurements. Unlike micron sized diamond suspensions these suspensions were non Newtonian and showed strong viscoelastic behavior without the electric field applied. Furt...

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Main Authors: Pereira Aricson, McIntyre Carl
Format: Article
Language:English
Published: De Gruyter 2014-12-01
Series:Applied Rheology
Subjects:
Online Access:https://doi.org/10.3933/applrheol-24-63471
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spelling doaj-1aab4ef2a242442e819526182245c2d42021-09-06T19:41:55ZengDe GruyterApplied Rheology1617-81062014-12-01246111910.3933/applrheol-24-63471Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory ShearPereira Aricson0McIntyre Carl1Department of Chemical Engineering, University of Louisiana, Lafayette,LA, USADepartment of Chemical Engineering, University of Louisiana, Lafayette,LA, USAThe rheological properties of diamond (< 10 nm) in silicone oil (PDMS) were analyzed using steady shear and oscillatory shear measurements. Unlike micron sized diamond suspensions these suspensions were non Newtonian and showed strong viscoelastic behavior without the electric field applied. Furthermore these nanodiamond mixtures showed sigmoidal behavior for their apparent viscosity as the shear rate is increased without the electric field applied. When the electric field was applied the apparent viscosity of the mixtures increased by an order of magnitude at lower shear rates. The effects of electric field and concentration on diamond rheology are both examined. The rate of shear thinning for the mixtures is high when the applied electric field is high. At high shear rates for the mixture the electric field does not have much effect. The flow curve was described by the Herschel-Bulkley model. Yield stress values obtained from the model gives an important relationship between yield stress, electric field and concentration, that is τ μ En and where 0.8 < n < 1.3.https://doi.org/10.3933/applrheol-24-63471electrorheologycarbondiamondnano powderyield stresselectrorheological fluid
collection DOAJ
language English
format Article
sources DOAJ
author Pereira Aricson
McIntyre Carl
spellingShingle Pereira Aricson
McIntyre Carl
Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear
Applied Rheology
electrorheology
carbon
diamond
nano powder
yield stress
electrorheological fluid
author_facet Pereira Aricson
McIntyre Carl
author_sort Pereira Aricson
title Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear
title_short Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear
title_full Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear
title_fullStr Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear
title_full_unstemmed Electrorheology of Diamond/PDMS Nanofluids in Steady and Oscillatory Shear
title_sort electrorheology of diamond/pdms nanofluids in steady and oscillatory shear
publisher De Gruyter
series Applied Rheology
issn 1617-8106
publishDate 2014-12-01
description The rheological properties of diamond (< 10 nm) in silicone oil (PDMS) were analyzed using steady shear and oscillatory shear measurements. Unlike micron sized diamond suspensions these suspensions were non Newtonian and showed strong viscoelastic behavior without the electric field applied. Furthermore these nanodiamond mixtures showed sigmoidal behavior for their apparent viscosity as the shear rate is increased without the electric field applied. When the electric field was applied the apparent viscosity of the mixtures increased by an order of magnitude at lower shear rates. The effects of electric field and concentration on diamond rheology are both examined. The rate of shear thinning for the mixtures is high when the applied electric field is high. At high shear rates for the mixture the electric field does not have much effect. The flow curve was described by the Herschel-Bulkley model. Yield stress values obtained from the model gives an important relationship between yield stress, electric field and concentration, that is τ μ En and where 0.8 < n < 1.3.
topic electrorheology
carbon
diamond
nano powder
yield stress
electrorheological fluid
url https://doi.org/10.3933/applrheol-24-63471
work_keys_str_mv AT pereiraaricson electrorheologyofdiamondpdmsnanofluidsinsteadyandoscillatoryshear
AT mcintyrecarl electrorheologyofdiamondpdmsnanofluidsinsteadyandoscillatoryshear
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