Shear viscosity and structural scalings in model adhesive hard-sphere gels

Phys Rev E Stat Nonlin Soft Matter Phys. 2014 May;89(5):050302. doi: 10.1103/PhysRevE.89.050302. Epub 2014 May 12.

Abstract

We present experiments and simulations that show a fundamental scaling for both the rheology and microstructure of flowing gels. Unique flow-SANS measurements demonstrate that the structure orients along both the neutral and compression axis. We quantify the anisotropy using a single parameter, α, that scales by a dimensionless number, M^{'}, that arises from a force balance on a particle. Simulations support the scalings and confirm the results are independent of the shape and range of the potential suggesting a universal for colloidal gels with short-ranged attractions.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adhesives / chemistry*
  • Anisotropy
  • Colloids
  • Compressive Strength
  • Computer Simulation
  • Elastic Modulus
  • Materials Testing
  • Models, Chemical*
  • Models, Molecular*
  • Rheology / methods*
  • Shear Strength
  • Silica Gel / chemistry*
  • Stress, Mechanical
  • Viscosity

Substances

  • Adhesives
  • Colloids
  • Silica Gel