S. Chander, CHALLENGES IN CHARACTERIZATION OF CONCENTRATED SUSPENSIONS, Colloids and surfaces. A, Physicochemical and engineering aspects, 133(1-2), 1998, pp. 143-150
With a decrease in particle size below 1 mu m the role of surfaces and
interfacial phenomena dominates the properties of powders in liquids.
A knowledge of properties of the system is often desired to develop p
redictive strategies to control the state of dispersion and aggregatio
n of powders. To obtain the desired stability and rheology of suspensi
ons, an adjustment of both physical and chemical variables might be re
quired. The success of such an approach depends on the ability to pred
ict correctly the system response from characteristics of the powder a
nd suspending medium. Several traditional methods of characterization
depend upon measurements in dilute suspensions, whereas most applicati
ons deal with processing and transport of dispersions at large particl
e loading (percent solids). Challenges in relating properties measured
in dilute suspensions to predict the behavior of concentrated suspens
ions will be discussed. Both thermodynamic or equilibrium, and kinetic
or rate effects are considered. (C) 1998 Elsevier Science B.V.