Investigation of the microenvironment of polyoxyethylene (4) lauryl ether reverse micelles with methyl orange as optical probe

Author: nana pilauri
Keywords: Reverse microemulsion, Brij 30, Optical probe, Methyl orange
Annotation:

The microenvironment of reverse micelles of polyoxyethylene (4) lauryl ether (Brij 30) was studied by UV-visible spectroscopy on the basis of methyl orange as molecular probe. The influence of concentration of surfactant, nature of oil phase and co-surfactant on the changes in absorption spectra of methyl orange was investigated. The association degrees of methyl orange with reverse micelles were determined. Profile of dependence of methyl orange absorption maxima versus water content indicates the existence of three types of water (primary bound water, secondary bound water and free water) in the water pockets of reverse micelles.