Start
Aug 10, 2017 - 11:00
End
Aug 10, 2017 - 12:00
Venue
Room No. 240 1-st floor Chem. Engg. dept
Event Type
Speaker
Dr. Sanjay Yadav of IIT Kharagpur
Title
POLYMER-SMALL PARTICLE MULTICOMPONENT COLLOIDAL SUSPENSIONS
Abstract: Polymer-small particle multicomponent colloidal suspensions are important class of soft matter that is encountered in several industries such as: agriculture pharmaceutical food paints ink coating etc. The mechanistic origins of several of their macroscopic properties can be traced back to the intricate interactions occurring at colloidal length scales. Among various small particles clay and carbonaceous (such as graphene graphene oxide and carbon nanotubes) are of special interest due to potential applications of these system in coating polymer nanocomposites etc. Colloidal states of such multicomponent systems depend on several factors a few of which are: particle/polymer concentration polymer-particle interracial interactions salt concentration pH temperature etc. Talk will focus on that how the fundamental aspects of flow behavior physio-chemical manifestations and structure formation in such suspensions can be explored using different experimental techniques such as rheology x-ray/neutron scattering dielectric relaxation spectroscopy zeta potential measurements etc. First part of my talk will focus on the evolution of aging dynamics of laponite suspension in presence of adsorbing polymer. Further anomalous temperature-viscosity relationship in polymer-clay suspensions will be explored. lastly talk will focus on quantification of polymer chain interface on a single layer of carbon sheets using SANS.