Dynamic rheology of sphere- and rod-based magnetorheological fluids

The Journal of Chemical Physics
J de VicenteRoque Hidalgo-Alvarez

Abstract

The effect of particle shape in the small amplitude oscillatory shear behavior of magnetorheological (MR) fluids is investigated from zero magnetic field strengths up to 800 kA/m. Two types of MR fluids are studied: the first system is prepared with spherical particles and a second system is prepared with rodlike particles. Both types of particles are fabricated following practically the same precipitation technique and have the same intrinsic magnetic and crystallographic properties. Furthermore, the distribution of sphere diameters is very similar to that of rod thicknesses. Rod-based MR fluids show an enhanced MR performance under oscillatory shear in the viscoelastic linear regime. A lower magnetic field strength is needed for the structuration of the colloid and, once saturation is fully achieved, a larger storage modulus is observed. Existing sphere- and rod-based models usually underestimate experimental results regarding the magnetic field strength and particle volume fraction dependences of both storage modulus and yield stress. A simple model is proposed here to explain the behavior of microrod-based MR fluids at low, medium and saturating magnetic fields in the viscoelastic linear regime in terms of magnetic interact...Continue Reading

Citations

Sep 22, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Priyadarshi PandaPatrick S Doyle
Jun 30, 2011·Nanoscale Research Letters·Jianbo Yin, Xiaopeng Zhao
Oct 15, 2010·The Journal of Chemical Physics·Tzu H Hsieh, Huan J Keh
May 16, 2012·The Journal of Chemical Physics·Tzu H Hsieh, Huan J Keh
Jun 28, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Rui ChengYiping Zhao
Sep 29, 2020·Soft Matter·Jose R Morillas, Juan de Vicente
Nov 4, 2017·The Journal of Chemical Physics·Joydip DasBidhan Chandra Bag
Mar 30, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Jose RamosRoque Hidalgo-Alvarez
Mar 22, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Modesto T López-LópezAndrey Zubarev
Jan 16, 2021·ACS Biomaterials Science & Engineering·Yuan Tian, Elizabeth A Lipke
Nov 28, 2012·Journal of Colloid and Interface Science·F VeredaR Hidalgo-Alvarez

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