Interfacial properties of polar liquids against nonpolar phases

George Zografi, Samuel H. Yalkowsky

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The interfacial tension of 10 polar liquids against hexane and tetradecane and the contact angle against paraffin, polyethylene, and polytetrafluoroethylene were measured. Work‐of‐adhesion values against any one nonpolar phase, calculated from these data, are independent of the polar liquid used. Values for the same polar liquid, however, differ with the nonpolar phase used. These differences are attributed to differing surface group densities and, hence, a different number of dispersion force interactions per unit area. These results explain the variations occurring in the Fowkes dispersion component of surface tension, γLd, for any liquid when it is determined using different nonpolar phases.

Original languageEnglish (US)
Pages (from-to)1533-1536
Number of pages4
JournalJournal of pharmaceutical sciences
Volume63
Issue number10
DOIs
StatePublished - Oct 1974
Externally publishedYes

Keywords

  • Contact angles—10 polar liquids against paraffin, polyethylene, and polytetrafluoroethylene, interfacial properties of polar liquids
  • Interfacial tension—10 polar liquids against hexane and tetradecane
  • Nonpolar phases—interfacial properties of 10 polar liquids against hexane, tetradecane, paraffin, polyethylene, and polytetrafluoroethylene, interfacial tension or contact angle measured, work‐of‐adhesion values calculated
  • Polar liquids—interfacial properties against nonpolar phases, interfacial tension and contact angles measured, work‐of‐adhesion values calculated

ASJC Scopus subject areas

  • Pharmaceutical Science

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