Yielding and flow of highly concentrated, few-layer graphene suspensions
File Type:
PDFItem Type:
Journal ArticleDate:
2015Access:
openAccessCitation:
Barwich, S., Coleman, J.N., Möbius, M.E, Yielding and flow of highly concentrated, few-layer graphene suspensions, Soft Matter, 11, 16, 2015, 3159-3164Download Item:
c4sm02855d.pdf (PDF) 760.9Kb
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.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
G2226/RFP-1/MTR/3135
Higher Education Authority (HEA)
Author's Homepage:
http://people.tcd.ie/colemajhttp://people.tcd.ie/mobiusm
Description:
PUBLISHED
Author: COLEMAN, JONATHAN; MOEBIUS, MATTHIAS
Sponsor:
Science Foundation Ireland (SFI)Higher Education Authority (HEA)
Type of material:
Journal ArticleCollections:
Series/Report no:
Soft Matter11
16
Availability:
Full text availableSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1039/c4sm02855dThe following license files are associated with this item: