Correlation between the Zeta Potential and Rheological Properties of Anatase Dispersions

Marek Kosmulski*, Jan Gustafsson, Jarl B. Rosenholm

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

63 Citations (Scopus)

Abstract

The viscosity at an arbitrarily selected shear rate of 1.16 s21 and
the yield stress of anatase dispersions are linearly correlated, and
both show a maximum at the isoelectric point (IEP) at pristine
conditions. The rheological properties of anatase dispersions re-
spond to the shift in the IEP to higher pH values, which is
observed in concentrated solutions of 1–1 electrolytes and in the
presence of the organic cosolvents, but the shift in the pH corre-
sponding to a maximum viscosity does not exactly match the shift
in the IEP. In contrast with the electrokinetic curves, the rheo-
logical curves at high ionic strengths are rather insensitive to the
nature of the supporting electrolyte. The acidic branch of the
viscosity(pH) curves is relatively insensitive to the ionic strength
while the slope of the basic branch decreases when the ionic
strength increases.
Original languageEnglish
Pages (from-to)200-206
JournalJournal of Colloid and Interface Science
Volume209
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

Keywords

  • Isoelectric point
  • Zeta potential
  • Rheology
  • Viscosity
  • yield point
  • concentrated dispersion
  • Anatase
  • Ionic strength
  • specific adsorption

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