Electric Field Driven Extensional Rheometry of Synovial Fluid
Sprache des Titels:
Englisch
Original Buchtitel:
Proceedings IEEE Sensors 2016
Original Kurzfassung:
The response to extensional deformation of
aqueous polymeric solutions depends strongly on the molecular
weight and concentration of the solute. The molecular weight of
hyaluronic acid in the synovial fluid is a critical parameter for its
physiological condition. We propose a novel method for the
characterization of these kinds of fluids using a fluidic two-phase
system where a dispensed droplet is elongated by electrostatic
forces from a voltage source of up to two kilovolts. This way a
filament is formed comparable to laboratory capillary breakup
extensional rheometers. High-speed imaging is used to investigate
the rapid deformation process. Using a mathematical model for
the dynamics of the filament evolution, the fluid parameters like
the shear viscosity and elastic modulus are derived. The
deformation rate can be controlled over a wide range by the
magnitude and slope of the applied voltage.
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