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Journal of Materials Science

, Volume 27, Issue 23, pp 6447–6451 | Cite as

Components of surface free energy of galena

  • B. Jańczuk
  • W. Wójcik
  • A. Zdziennicka
  • F. González-Caballero
Papers

Abstract

Measurements of the contact angle for water, diiodomethane, bromoform and 1,1,2,2-tetrabromoethane on non-oxidized and oxidized surfaces of galena were made. Using the results obtained, the “geometric mean” approach, and the long-range and short-range interactions approaches, the dispersion and non-dispersion, and Lifshitz-van der Waals and acid-base components of the surface free energy of galena were determined and compared with those calculated from adsorption isotherms ofn-octane andn-propanol. On the basis of the measurements and calculations it was found that the surface free energy of galena depends on its degree of oxidation and arise mainly from London's and acid-base intermolecular interactions. It was also found that values of the dispersion and non-dispersion components of galena surface free energy determined from the contact angle assuming that a film is present around the water and diiodomethane drops, are close to those obtained from adsorption isotherms ofn-octane andn-propanol.

Keywords

Oxidation Polymer Free Energy Contact Angle Intermolecular Interaction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • B. Jańczuk
    • 1
  • W. Wójcik
    • 1
  • A. Zdziennicka
    • 1
  • F. González-Caballero
    • 2
  1. 1.Department of Physical Chemistry, Faculty of ChemistryMaria Curie-Skłodowska UniversityLublinPoland
  2. 2.Departamento de Fisica Aplicada, Facultad de CienciasUniversidad de GranadaGranadaSpain

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