CONDUCTIVITY OF IONIC SURFACTANT SOLUTION S - EVIDENCE FOR CHANGES INTHE DEGREE OF IONIC DISSOCIATION OF MICELLES WITH SURFACTANT CONCENTRATION

Citation
J. Toullec et S. Couderc, CONDUCTIVITY OF IONIC SURFACTANT SOLUTION S - EVIDENCE FOR CHANGES INTHE DEGREE OF IONIC DISSOCIATION OF MICELLES WITH SURFACTANT CONCENTRATION, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 324(12), 1997, pp. 773-780
Citations number
20
Categorie Soggetti
Multidisciplinary Sciences
ISSN journal
12518069
Volume
324
Issue
12
Year of publication
1997
Pages
773 - 780
Database
ISI
SICI code
1251-8069(1997)324:12<773:COISSS>2.0.ZU;2-Q
Abstract
Contrary to what is generally accepted, the conductivity data (K) for aqueous solutions of ionic surfactants are shown to be consistent with a significant decrease in the degree (alpha) of micelle ionic dissoci ation when the surfactant concentration increases. The linear variatio ns of K above the critical micelle concentration (cmc) do not stem fro m a constancy of alpha, but from compensatory effects on K. Conductivi ty data for dodecyltrimethylammonium bromide (DTAB) are examined to il lustrate this point.