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

0391688 - ÚCHP 2014 CZ eng A - Abstrakt
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 ostatní: COST(XE) MP1106
Program: COST Actions
Institucionální podpora: RVO:67985858
Klíčová slova: solid-liquid interface * colloidal dispersions * AWS viscometry
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

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¨.
Trvalý link: http://hdl.handle.net/11104/0220674