Ferrofluid
AssigneeMyneip B.V.
InventorsPiotr Jakub Glazer, Shriya Reddy Paida, Peter Carlo Rem
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Abstract
The invention is directed to a method and a system for producing a ferrofluid comprising providing a stock solution with Fe(II) and Fe(III); mixing the stock solution with a base to form magnetic nanoparticles and a spent solution, said method further comprising a separation step of separating the nanoparticles from the spent solution by applying a magnet to immobilize the nanoparticles and remove at least part of the spent solution as supernatant from the immobilized nanoparticles. In another aspect, the invention is directed to the resulting ferrofluid.
Claims12
A method of producing a ferrofluid, comprising
- providing a stock solution with Fe (II) and Fe (III);
- mixing the stock solution with a base to form magnetic nanoparticles and a spent solution;
- a separation step of separating the nanoparticles from the spent solution by applying a magnet to immobilize the nanoparticles and remove at least part of the spent solution as supernatant from the immobilized nanoparticles;
- one or more additional washing steps following the separation step, each washing step comprising releasing the nanoparticles from the magnetic immobilization, mixing the released nanoparticles with a washing solution which comprises water, re-immobilizing the nanoparticles with the magnet and removing at least part of the used washing solution as supernatant from the immobilized nanoparticles to form a nanosuspension comprising the nanoparticles;
- and
- a coating step wherein the nanoparticles in the nanosuspension are coated with a surfactant.
Dependencies are inferred from the claim text.