E-Locus - Institutional Repository of the University of Crete

Home Collections School/Department School of Sciences and Engineering Department of Materials Science and Technology Doctoral theses

Doctoral theses

Search command : Author="Κωνσταντινίδης" And Author="Κ." And Author="Θεόδωρος"

Current Record: 19 of 78

[Add to Basket]

Identifier

000442964

Title

Yielding and structure under flow of gels and glasses of rod-like colloids

Alternative Title

Μικροσκοπική δομή και μηχανισμοί διαρροής κολλοειδών πηκτωμάτων και ύαλων ραβδωτών κολλοειδών

Author

Mohandas

Thesis advisor

Πετεκίδης, Γεώργιος

Abstract

In this dissertation we investigate the dynamics, phase behaviour, linear and nonlinear rheological response of suspensions of rod-like colloids with repulsive and attractive interactions. We use rheology in combination with various optical techniques including confocal microscopy to elucidate the role of microstructure in mechanical properties and flow behaviour of rod suspensions. Micron sized silica rods suspended in various density and refractive index matched solvents were used as the experimental model rod system. This dissertation is divided into mainly four parts. The first part discusses the role of confinement on the nonlinear rheological response of dilute suspension of attractive rods. The second part compares the role of pre-shear history on the linear rheological response of semi-dilute suspensions of attractive silica sphere and rod suspensions. Third part investigates the yielding response of a dense suspension of repulsive silica rods. Fourth and last part examines the relationship between particle orientation and shear thickening in dense silica rod suspension.

Language

English

Subject

Confocal microscopy

Ρεολογία

Συνεστιακή μικροσκοπία

Issue date

2021-11-26

Collection

School/Department--School of Sciences and Engineering--Department of Materials Science and Technology--Doctoral theses

Type of Work--Doctoral theses

Permanent Link