Liquid–liquid phase transfer of magnetite nanoparticles

S. Machunsky, P. Grimm, H.-J. Schmid, U.A. Peuker, Colloids and Surfaces A: Physicochemical and Engineering Aspects 348 (2009) 186–190.

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Journal Article | Published | English
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Abstract
The study presents first experimental results of the transfer of magnetite nanoparticles from an aqueous to a second non-miscible non-aqueous liquid phase. The transfer is based on the adsorption of macromolecular surfactants onto the particle surface at the liquid–liquid interface. For a successful direct phase transfer, it is essential to have cations, like ammonium ions, present in the aqueous phase as well as a threshold concentration of surfactant in the organic liquid phase. While penetrating the liquid–liquid interface, the particles are covered with the surfactant and therefore a partial de-agglomeration is initiated. Based on literature and experimental data a mechanism of surfactant adsorption is proposed. The competing adsorption of the surfactant molecules at the liquid–liquid interface leads to the formation of emulsions and therefore to a hindrance for particles passing the interface. Nevertheless a high efficiency of 100% yield can be reached using optimized process parameters for the phase transfer process.
Publishing Year
Journal Title
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume
348
Issue
1-3
Page
186-190
ISSN
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Machunsky S, Grimm P, Schmid H-J, Peuker UA. Liquid–liquid phase transfer of magnetite nanoparticles. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2009;348(1-3):186-190. doi:10.1016/j.colsurfa.2009.07.014
Machunsky, S., Grimm, P., Schmid, H.-J., & Peuker, U. A. (2009). Liquid–liquid phase transfer of magnetite nanoparticles. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 348(1–3), 186–190. https://doi.org/10.1016/j.colsurfa.2009.07.014
@article{Machunsky_Grimm_Schmid_Peuker_2009, title={Liquid–liquid phase transfer of magnetite nanoparticles}, volume={348}, DOI={10.1016/j.colsurfa.2009.07.014}, number={1–3}, journal={Colloids and Surfaces A: Physicochemical and Engineering Aspects}, author={Machunsky, Stefanie and Grimm, Philipp and Schmid, Hans-Joachim and Peuker, Urs A.}, year={2009}, pages={186–190} }
Machunsky, Stefanie, Philipp Grimm, Hans-Joachim Schmid, and Urs A. Peuker. “Liquid–Liquid Phase Transfer of Magnetite Nanoparticles.” Colloids and Surfaces A: Physicochemical and Engineering Aspects 348, no. 1–3 (2009): 186–90. https://doi.org/10.1016/j.colsurfa.2009.07.014.
S. Machunsky, P. Grimm, H.-J. Schmid, and U. A. Peuker, “Liquid–liquid phase transfer of magnetite nanoparticles,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 348, no. 1–3, pp. 186–190, 2009, doi: 10.1016/j.colsurfa.2009.07.014.
Machunsky, Stefanie, et al. “Liquid–Liquid Phase Transfer of Magnetite Nanoparticles.” Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 348, no. 1–3, 2009, pp. 186–90, doi:10.1016/j.colsurfa.2009.07.014.

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