Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles

This study represents a pioneering work on the extensional magnetorheological properties of human blood analogue fluids loaded with magnetic microparticles. Dynabeads M-270 particles were dispersed in Newtonian and viscoelastic blood analogue fluids at 5% wt. Capillary breakup experiments were perfo...

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Autores principales:	João M. Nunes, Francisco J. Galindo-Rosales, Laura Campo-Deaño
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	magnetorheology capillary thinning extensional rheometer blood analogues magnetic particles Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/de0462dc9e664244b503346464dee373
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spelling	oai:doaj.org-article:de0462dc9e664244b503346464dee3732021-11-25T18:14:46ZExtensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles10.3390/ma142269301996-1944https://doaj.org/article/de0462dc9e664244b503346464dee3732021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6930https://doaj.org/toc/1996-1944This study represents a pioneering work on the extensional magnetorheological properties of human blood analogue fluids loaded with magnetic microparticles. Dynabeads M-270 particles were dispersed in Newtonian and viscoelastic blood analogue fluids at 5% wt. Capillary breakup experiments were performed, with and without the influence of an external magnetic field aligned with the flow direction. The presence of the particles increased the viscosity of the fluid, and that increment was larger when embedded within a polymeric matrix. The application of an external magnetic field led to an even larger increment of the viscosity of the working fluids, as the formation of small aggregates induced an increment in the effective volume fraction of particles. Regarding the liquid bridge stability, the Newtonian blood analogue fluid remained as a Newtonian liquid exhibiting a pinch-off at the breakup time in any circumstance. However, in the case of the viscoelastic blood analogue fluid, the presence of the particles and the simultaneous application of the magnetic field enhanced the formation of the beads-on-a-string structure, as the Ohnesorge number remained basically unaltered, whereas the time of the experiment increased due to its larger viscosity, which resulted in a decrease in the Deborah Number. This result was confirmed with fluids containing larger concentrations of xanthan gum.João M. NunesFrancisco J. Galindo-RosalesLaura Campo-DeañoMDPI AGarticlemagnetorheologycapillary thinningextensional rheometerblood analoguesmagnetic particlesTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6930, p 6930 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	magnetorheology capillary thinning extensional rheometer blood analogues magnetic particles Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	magnetorheology capillary thinning extensional rheometer blood analogues magnetic particles Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 João M. Nunes Francisco J. Galindo-Rosales Laura Campo-Deaño Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles
description	This study represents a pioneering work on the extensional magnetorheological properties of human blood analogue fluids loaded with magnetic microparticles. Dynabeads M-270 particles were dispersed in Newtonian and viscoelastic blood analogue fluids at 5% wt. Capillary breakup experiments were performed, with and without the influence of an external magnetic field aligned with the flow direction. The presence of the particles increased the viscosity of the fluid, and that increment was larger when embedded within a polymeric matrix. The application of an external magnetic field led to an even larger increment of the viscosity of the working fluids, as the formation of small aggregates induced an increment in the effective volume fraction of particles. Regarding the liquid bridge stability, the Newtonian blood analogue fluid remained as a Newtonian liquid exhibiting a pinch-off at the breakup time in any circumstance. However, in the case of the viscoelastic blood analogue fluid, the presence of the particles and the simultaneous application of the magnetic field enhanced the formation of the beads-on-a-string structure, as the Ohnesorge number remained basically unaltered, whereas the time of the experiment increased due to its larger viscosity, which resulted in a decrease in the Deborah Number. This result was confirmed with fluids containing larger concentrations of xanthan gum.
format	article
author	João M. Nunes Francisco J. Galindo-Rosales Laura Campo-Deaño
author_facet	João M. Nunes Francisco J. Galindo-Rosales Laura Campo-Deaño
author_sort	João M. Nunes
title	Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles
title_short	Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles
title_full	Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles
title_fullStr	Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles
title_full_unstemmed	Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles
title_sort	extensional magnetorheology of viscoelastic human blood analogues loaded with magnetic particles
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/de0462dc9e664244b503346464dee373
work_keys_str_mv	AT joaomnunes extensionalmagnetorheologyofviscoelastichumanbloodanaloguesloadedwithmagneticparticles AT franciscojgalindorosales extensionalmagnetorheologyofviscoelastichumanbloodanaloguesloadedwithmagneticparticles AT lauracampodeano extensionalmagnetorheologyofviscoelastichumanbloodanaloguesloadedwithmagneticparticles
_version_	1718411470438400000

Extensional Magnetorheology of Viscoelastic Human Blood Analogues Loaded with Magnetic Particles

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