Contact
    Start Publications Reversed micelle formation in a model liquid–liquid extraction ...
    ←  Publication Finder
    Attension

    Reversed micelle formation in a model liquid–liquid extraction system

    Year: 2008

    Journal: Journal of Colloid and Interface Science, Volume 322, Issue 2, 15 June 2008, Pages 605-610, 20111221

    Authors: Fuqiang Guoa, Hongfei Lia, Zhifeng Zhanga, Shulan Menga and Deqian Li

    Organizations: Key Laboratory of Rare Earth on Advanced Materials and Valuable Utilization of Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China, and Graduate University of Chinese Academy of Sciences, Beijing 100049, China

    The formation of reversed micelles and the roles of extractant and extracted complexes were investigated in the Cyanex923/n-heptane/H2SO4 system. Interfacial tension (γ), electrical conductivity (κ), and water content measurements showed that Cyanex923 had a tendency to self-assemble, forming reversed micelles. The changes in electrical conductivity with concentration of H2SO4 in the organic phase (View the MathML source) exhibited an S-type curve: a correlation was found between the change in electrical conductivity and the water content as a function of View the MathML source. The changes of electrical conductivity were mainly induced by the components and microstructure in the organic phase, while the conversion of extracted complex also resulted in the changes of components and microstructure in the organic phase. Fourier transform infrared (FTIR) spectroscopy and dynamic light scattering (DLS) were used to characterize the organic phases and sizes of the reversed micelles, respectively. The extractant and extracted complexes, such as Cyanex923dot operatorH2SO4, were involved in the formation of reversed micelles.