How to make a ferrofluid
Experiments with ferrofluid are widely distributed in the form of videos on the Internet. The fact that this type of liquid under the influence of the magnet makes certain movements, which makes a very spectacular experiments. Let's try to do this on their own liquid. But first, find out what it is like.
Instruction how to make a ferrofluid
Ferrofluid can be made with their own hands at home. To do this, take the oil (suitable motor, sunflower, etc.), as well as toner for laser printer (the substance in powder form). Now mix both ingredients to the consistency of sour cream.
To effect was maximum, mayhem resulting mixture in a water bath for about half an hour, do not forget to stir it.
Remember that strong magnetization has not every toner, so try to choose the highest quality.
Ferromagnetic liquid (ferrofluid) - it is a liquid, which is strongly polarized by the magnetic field. Simply put, if you bring a regular magnet in the liquid, it produces certain movements, for example, resembles a hedgehog gets the hump, etc.
Generally ferromagnetic fluid - a colloidal systems which consist of ferromagnetic or ferrimagnetic particles of nanometer sizes. These particles are suspended in a fluid (liquid - usually water or organic solvent).
To create such a fluid resistance, it is necessary to bind the ferromagnetic particles with the surfactant (surfactant) - it creates a so-called protective sheath around the particles which prevents their coalescence due to Van der Waals and magnetic forces.
However, despite its name, does not have a ferromagnetic fluid ferromagnetic properties. This happens because after the external magnetic field disappears, they do not retain residual magnetization.
Ferromagnetic fluids in fact represent a paramagnetic, they are also often called "superparamagnetic", because they have very high a magnetic susceptibility.