Type

Journal Article

Authors

Matthias E Möbius
Jonathan Coleman
Sebastian Barwich

Subjects

Engineering

Topics
viscoelastic properties nanoscience materials viscoelasticity graphene yield stress suspensions microstructure energy flow rheological properties platelets size

Yielding and flow of highly concentrated, few-layer graphene suspensions (2015)

Abstract For a wide range of applications of graphene suspensions, a thorough understanding of their rheological properties is crucial. We probe the microstructure of dense suspensions of micron-sized, few-layer, defect-free graphene platelets by measuring their viscoelastic properties at various concentrations up to 39 mg ml-1. We propose a model to relate the yield strain to the mesh size of the microstructure as a function of volume fraction Φ. From the yield stress measurements we infer the typical bond energy (≈20 kBT) and Φ dependence of the bond number density. These results allow us to express the steady shear viscosity for Peclet number Pe < 10 in terms of the platelet dimensions, bond energy and Φ using a relaxation ansatz.
Collections Ireland -> Trinity College Dublin -> RSS Feeds
Ireland -> Trinity College Dublin -> School of Physics
Ireland -> Trinity College Dublin -> Physics (Scholarly Publications)
Ireland -> Trinity College Dublin -> RSS Feeds
Ireland -> Trinity College Dublin -> Physics

Full list of authors on original publication

Matthias E Möbius, Jonathan Coleman, Sebastian Barwich

Experts in our system

1
Matthias E Möbius
Trinity College Dublin
Total Publications: 4
 
2
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
3
Sebastian Barwich
Trinity College Dublin
Total Publications: 5