The sponge phase of a mixed surfactant system

A. Maldonado, R. Ober, T. Gulik-Krzywicki, W. Urbach, D. Langevin

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We study the sponge phase of the mixed non-ionic/ionic surfactant system C14DMAO-TTAB-hexanol-brine. Our aim is to determine if this phase exists in this mixed system and if it preserves or changes its structure when the relative amount of the charged surfactant is increased in the mixture. SAXS, FFEM, and conductivity results show that for the same bilayer volume fraction the sponge phase preserves its global structure. We propose a method to determine the geometrical obstruction factor from electrical conductivity measurements in ionic sponge phases. Analysis of lamellar phases in the same system shows that the bilayer thickness increases when the ionic surfactant concentration is increased. © 2007.
Original languageAmerican English
Pages (from-to)485-490
Number of pages6
JournalJournal of Colloid and Interface Science
StatePublished - 15 Apr 2007


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