Interfacial Characteristics of Colloidal Dispersions: The Apparent Wall Slip and Its Detection

0391688 - ÚCHP 2014 CZ eng A - Abstract
Pěnkavová, Věra - Wein, Ondřej
Interfacial Characteristics of Colloidal Dispersions: The Apparent Wall Slip and Its Detection.
Program and Abstracts. Prague: ICPF ASCR, 2013. s. 98. ISBN N.
[Workshop on Smart and Green Interfaces 2013. 20.3.2013-22.03.2013, Prague]
Grant - others:COST(XE) MP1106
Program: COST Actions
Institutional support: RVO:67985858
Keywords : solid-liquid interface * colloidal dispersions * AWS viscometry
Subject RIV: CI - Industrial Chemistry, Chemical Engineering

In this contribution we describe methodology, called AWS viscometry, which enables us to detect both viscosity of colloidal dispersion and slip coefficient which characterizes the flow behavior at solid-liquid interface. Due to dependence of AWS contribution to flow on gap thickness we can detect both viscosity and slip coefficient via viscometry measurements done at various gap thicknesses for the same shear stress. Treating data using nonlinear regression enables us to detect both viscosity and slip coefficient. Therefore we are able to describe full behavior of colloidal dispersion flowing around solid wall. Principles of AWS viscometry are shown on example of aqueous kaolin dispersions¨.
Permanent Link: http://hdl.handle.net/11104/0220674