Removing the magnetic field will allow the ferrofluid to flow like a liquid again. When disposing of your ferrofluid, do not pour it down the drain; this could lead to clogged pipes! Did you know? Ferrofluids are used by the military to coat aircraft; this helps them elude radar. Ferrofluid comes to you courtesy of the same folks who brought you Tang and freeze-dried ice cream: NASA scientists!
They came up with the idea in order to confine liquids in space. Watch Ferrofluids in Action! The movies show a ferrofluid in two different situations: Plastic Petri Upsweep. The ferrofluid is in a plastic dish with a slightly convex bottom, so the ferrofluid moves towards the outer edge.
As the movie plays, the magnetic field is getting stronger, and the fluid coalesces into smaller and smaller cone-like structures which you see from the top down. Using a lower viscosity oil like kerosene or biodiesel along with a surfactant citric acid, oleic acid, etc.
The ferric chloride conversion is clever. Electronics enthusiasts often keep ferric chloride at home to eat away copper which makes a reasonable DIY circuit board. The chemistry involved seems easy enough. Finally, we have what looks like the most DIY approach—acetone to extract the iron particles from old casette tapes. Obtaining tapes and using acetone is labor intensive, but commendable. Combining two unusual uses of magnetic fluids invites further empowerment for the maker.
This French nail polish has magnetic particles that can be triggered into elegant patterns after being applied and before setting up. And Martin Frey has a dynamically controlled ferrofluid art piece titled SnOil that offers pixels that is a low-res display.
I plan to try the chemical ferric chloride approach used in DIY option 2 substituting the kerosene for biodiesel and the oleic acid for citric acid.
If you need to dispose of your ferrofluid at some point, dispose of it the way you would dispose of kerosene. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance.
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Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Here's how:. Featured Video. Cite this Article Format.
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