Ferrimagnetic membranes for separation of paramagnetic and diamagnetic species

J. Gwak , Andre Ayral (1) , V. Rouessac (1) , Louis Cot (1) , Jc Grenier , Es Jang , Jh Choy

1 IEM - Institut Européen des membranes

For using as separative membranes based on magnetic selectivity, nanoporous ferrimagnetic membranes of maghemite (gamma-Fe2O3) and cobalt ferrite (Fe2CoO4) were prepared by the sol-gel route from ferrofluid colloidal solutions. Their magnetic properties were examined by superconductor quantum interference device (SQUID), and their structures and porous textures were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen adsorption-desorption analyses. O-2-N-2 adsorption and air separation experiments were carried out in order to evidence magnetic interactions in static and dynamic conditions, respectively. A small effect of an external magnetic field on the selectivity of these membranes was observed.

Mots clés: MOLECULES; PARTICLES

Domaines: Matériaux

J. Gwak, Andre Ayral, V. Rouessac, Louis Cot, Jc Grenier, et al.. Ferrimagnetic membranes for separation of paramagnetic and diamagnetic species. Symposium on Membranes-Preparation, Properties and Applications held at the 2002 MRS Fall Meeting, Dec 2002, BOSTON (MA), United States. pp.219-224. ⟨hal-00450227⟩