Liquid-Liquid Interfacial Transport of Nanoparticles. (8th January 2008)

• Record Type: Journal Article
• Authors: Machunsky, Stefanie; Peuker, Urs Alexander
• Other Names: Nirschl Hermann Academic Editor.
• Is Part Of: Physical separation in science and engineering. Volume 2007(2007)
• Publication Date: 2008-01-08
• Subjects: Separation (Technology) -- Periodicals; Séparation (Technologie); Separation (Technology); Separation & Purification; Periodicals; Electronic journals; 660.284
• DOI: 10.1155/2007/34832
• Languages: English
• ISSNs: 1478-6478

Abstract

Abstract : The study presents the transfer of nanoparticles from the aqueous phase to the second nonmiscible nonaqueous liquid phase. The transfer is based on the sedimentation of the dispersed particles through a liquid-liquid interface. First, the colloidal aqueous dispersion is destabilised to flocculate the particles. The agglomeration is reversible and the flocs are large enough to sediment in a centrifugal field. The aqueous dispersion is laminated above the receiving organic liquid phase. When the particles start to penetrate into the liquid-liquid interface, the particle surface is covered with the stabilising surfactant. The sorption of the surfactant onto the surface of the primary particles leads to the disintegration of the flocs. This phase transfer process allows for a very low surfactant concentration within the receiving organic liquid, which is important for further application, that is, synthesis for polymer-nanocomposite materials. Furthermore, the phase transfer of the nanoparticles shows a high efficiency up to 100% yield. The particle size within the organosol corresponds to the primary particle size of the nanoparticles.