Surface activity and micellar properties of anionic gemini surfactants and their analogues

M. Ben-Moshe, S. Magdassi

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The properties of didodecyldiphenylether disulfonate gemini-type surfactants have been studied and compared to mono-alkylated and monosulfonated analogous surfactants. Dynamic and equilibrium surface tension measurements indicate that the gemini surfactants have a higher surface activity compared to that of the monoalkyl analogues. The gemini-type surfactants have much larger surface area per molecule, opposite effect of carbon number on CMC and considerable swelling of the micelles upon increasing surfactant concentration. Determination of aggregation numbers by fluorescence measurements reveals that the longer chain gemini surfactants form micelles having less than 10 molecules per micelle.

Original languageAmerican English
Pages (from-to)403-408
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume250
Issue number1-3 SPEC. ISS.
DOIs
StatePublished - 10 Dec 2004

Keywords

  • Gemini-type
  • Micelles
  • Surfactants

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