Dielectric Properties of Apolar Micelle Solutions Containing Solubilized Water

✍ Scribed by Hans-Freidrich Eicke; John C. W. Shepherd

• Publisher: John Wiley and Sons
• Year: 1974
• Tongue: German
• Weight: 712 KB
• Volume: 57
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19740570708

✦ Synopsis

Abstract

Varying amounts of water have been solubilized in a micelle solution of sodium di‐2‐pentyl–sulfoscuccinate in benzene and the complex permittivity has been observed in the range 200 KHz to 10 MHz. Part of a dielectric dispersion is seen, which extends to higher frequencies with a broad distribution of relaxation times. Due to association processes, the static dielectric increment is found to vary non‐linearly with hydrated micelle concentration and with the amount of solubilized water, whereas a linear variation with micelle concentration is found if no water is added. These effects are explained on the assumption that part of the solubilized water increases the dipole moment of the micelle.

Additionally, at higher water concentrations, a sudden increase in the conductivity of the solution is observed, which is taken to indicate a conformational change of the solubilized micelle.