Paper Number
SG4 

Session
Solids, Composites & Granular Materials

Title
Structural evolution of grafted-nanoparticles in shear flow

Presentation Date and Time
October 17, 2018 (Wednesday) 11:05

Track / Room
Track 4 / Post Oak

Authors (Click on name to view author profile)

1. Krishnamoorti, Ramanan (University of Houston, Chemical and Biomolecular Engineering)

Author and Affiliation Lines (in printed abstract book)
Ramanan Krishnamoorti
Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77004

Speaker / Presenter 
Krishnamoorti, Ramanan

Text of Abstract
Polymer-grafted nanoparticles, at high grafting densities, arrange into highly ordered crystalline arrangements. The linear viscoelastic properties of such hybrids demonstrate many similarities to colloidal suspensions and star polymers. However, their viscoelastic response to strong shear flows is significantly different. Specifically, these systems demonstrate strong shear-thinning character. Direct structural probes such as in-situ x-ray scattering demonstrate the formation of slip planes that are possibly responsible for the strong shear-thinning character.