Surface and colloid properties of cyclic amides II. Phase separation, surface activity and micellization in mixtures of N-hexyl-2-pyrrolidone and water

Anjing Lou, Brian A. Pethica, P. Somasundaran

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

N-hexyl-2-pyrrolidone (HP) and water are partially miscible above a lower consolute temperature (LCT) of 19.1 °C. The interfacial tension of the two phase system was measured as a function of temperature. HP is surface active at the air/solution interface and forms micelles in solution at all temperatures from the freezing point up to the LCT and up to 25 °C in the water-rich phase above the LCT. At low water contents, water is positively adsorbed at the air/solution interface.

Original languageEnglish (US)
Pages (from-to)297-303
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume129-130
DOIs
StatePublished - Nov 30 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Keywords

  • Micellization
  • N-hexyl-2-pyrrolidone
  • Phase separation

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