Reversible agglomeration: A kinetic model for the peptization of titania nanocolloids

Danijela Vorkapic, Themis Matsoukas

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

We formulate a model for the peptization of titania nanocolloids. The model assumes simultaneous agglomeration/deagglomeration with size- independent rate constants. It predicts that the evolution of the particle size exhibits first-order kinetics and that the final particle size scales as R ~ C(1/df), where C is the mass concentration of the colloid and d(f) is the fractal dimension. These predictions are tested experimentally. We find that the model provides a quantitative and consistent description of the peptization process over a wide range of experimental variables and that it allows the determination of the aggregation and deaggregation rate constants from the time evolution of the average size.

Original languageEnglish (US)
Pages (from-to)283-291
Number of pages9
JournalJournal of Colloid And Interface Science
Volume214
Issue number2
DOIs
StatePublished - Jun 15 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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