Surface Characterization of Surfactant-Modified Colloidal Alumina

  • C. A. Malbrel
  • P. Somasundaran
  • M. Francois
  • J. E. Poirier
  • J. M. Cases


Surface modification by surfactant and polymer adsorption is being increasingly used to adjust the surface properties of mineral fines for use in technological applications such as formulation of fillers for elastomers or dispersion of pigments in paints and other coatings. ESR spectroscopy is used here to monitor in-situ adsorption of Aerosol OT on colloidal alumina prior to adsorption of water vapor. Analysis of the adsorption isotherm of water on the surfactant-modified alumina particles shows that water adsorbs only on the fraction of the alumina surface not coated with the surfactant. It is found also that no significant interaction exists between water and surfactant molecules during the hydration of the surface.


Electron Spin Resonance Adsorption Isotherm Electron Spin Resonance Spectrum Surfactant Molecule Lauric Acid 
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Copyright information

© Elsevier Science Publishing Co., Inc. 1990

Authors and Affiliations

  • C. A. Malbrel
    • 1
  • P. Somasundaran
    • 1
  • M. Francois
    • 2
  • J. E. Poirier
    • 2
  • J. M. Cases
    • 2
  1. 1.Langmuir Center for Colloids and InterfacesColumbia UniversityNew YorkUSA
  2. 2.Centre de Recherche sur la Valorisation des MineraisVandoeuvre CedeFrance

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