Paper Number
SC41 

Session
Suspensions and Colloids

Title
High shear capillary rheology and flow birefringence of rod-like viruses

Presentation Date and Time
October 12, 2022 (Wednesday) 11:10

Track / Room
Track 1 / Sheraton 4

Authors (Click on name to view author profile)

  1. Kuei, Steve (NIST, Polymers & Complex Fluids)
  2. Salipante, Paul (NIST, Polymers and Complex Fluids)
  3. Murphy, Ryan P. (NIST, NCNR)
  4. Katie, Weigandt M. (NIST, NCNR)
  5. Hudson, Steven D. (NIST, Polymers & Complex Fluids)

Author and Affiliation Lines (in printed abstract book)
Steve Kuei1, Paul Salipante1, Ryan P. Murphy2, Weigandt M. Katie2 and Steven D. Hudson1
1Polymers & Complex Fluids, NIST, Gaithersburg, MD 20899; 2NCNR, NIST, Gaithersburg, MD 20899

Speaker / Presenter 
Hudson, Steven D.

Keywords
experimental methods; bio-fluids; colloids; polymer solutions; rheometry techniques

Text of Abstract
Rod-like particles are efficient rheology modifiers and are commonly found in a variety of biologically and industrially relevant solutions, from biofilaments to worm-like surfactant solutions. These solutions display strong shear-thinning behavior, and there is an ongoing effort to understand the microstructural changes of these fluids, how they depend on the properties of the suspended particles, and how these changes manifest in the resulting rheology. Using solutions of fd bacteriophage as a model monodisperse rod system, we use capillary microrheology and flow birefringence to determine rheological behavior across six decades of shear rate up to 1,000,000/s, at various semidilute solution concentrations. Dilute theory accurately predicts some observed behaviors and other deviations illustrate effects of particle interactions.