Transition from thermodynamically stable solution to colloid dispersion state

Attila Borsos, T. Gilányi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this work, we investigated the transition between solution and dispersion state of the poly-N-isopropylacrylamide microgel latex. The aggregation state of the colloid system was described by applying the multiple chemical equilibrium model. The model predicts that in the case of ordinary colloid dispersions, formation of small equilibrium aggregates cannot be expected in the practically accessible concentration range. However, when the particle-particle attraction is small enough, then formation of finite size aggregates in equilibrium with the monomers may take place. To test the model, the aggregation behavior of a temperature-sensitive soft colloid dispersion (poly-N-isopropylacrylamide microgels) was investigated for which the attractive interactions could be precisely controlled by the temperature of the system. The experimental results provide a support for the theoretical predictions.

Original languageEnglish
Pages (from-to)473-479
Number of pages7
JournalColloid & Polymer Science
Volume290
Issue number5
DOIs
Publication statusPublished - Mar 2012

Fingerprint

Colloids
colloids
Agglomeration
Latex
latex
Latexes
Dispersions
attraction
chemical equilibrium
monomers
Monomers
Temperature
temperature
predictions
interactions
poly-N-isopropylacrylamide

Keywords

  • Aggregation
  • Colloid stability
  • Microgels
  • Poly(N-isopropylacrylamide)
  • Soft particles

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry
  • Colloid and Surface Chemistry

Cite this

Transition from thermodynamically stable solution to colloid dispersion state. / Borsos, Attila; Gilányi, T.

In: Colloid & Polymer Science, Vol. 290, No. 5, 03.2012, p. 473-479.

Research output: Contribution to journalArticle

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