Colloidal Particles in Competition for Stabilizer: A Solvent Relaxation NMR Study of Polymer Adsorption and Desorption

Catherine L. Cooper*, Terence Cosgrove, Jeroen S. van Duijneveldt, Martin Murray, Stuart W. Prescott

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

19 Citations (Scopus)

Abstract

The competitive adsorption of poly(vinylpyrrolidone) onto silica and alumina-modified silica particles was studied using solvent relaxation nuclear magnetic resonance. The additive nature of the measured relaxation rate enabled predictions to be made of the relaxation rate in different polymer adsorption scenarios. Preferential adsorption of the poly(vinylpyrrolidone) onto the unmodified silica particles occurred when there was insufficient polymer in the system to coat the entire available surface area. Desorption was also found to occur when the polymer was initially adsorbed upon the alumina-modified particle and silica particles were added.

Original languageEnglish
Pages (from-to)16588-16595
Number of pages8
JournalLangmuir
Volume28
Issue number48
DOIs
Publication statusPublished - 4 Dec 2012

Keywords

  • NUCLEAR MAGNETIC-RESONANCE
  • SOLID-LIQUID INTERFACE
  • POLY(ETHYLENE OXIDE)
  • POLYVINYL PYRROLIDONE)
  • POLY(VINYL PYRROLIDONE)
  • MOLECULAR WEIGHT
  • SILICA
  • NANOPARTICLES
  • DISPLACEMENT
  • SURFACE

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