The drift by a slide or when you rub a balloon on our head and soon we see the curious effect caused by static electricity: the hair stands on end as if by magic. This phenomenon was already known by the ancient greeks and it is very easy to see, but, interestingly, scientists still don't know why it happens.
Now it could have come the answer. As has published in Sciencemagazine, a new study published in Physical Review Letters has proposed an explanation: a phenomenon known as flexoelectricidad.
unlike the electrical current that circulates through the wires, the static electricity (also known as triboelectricidad) is still. This occurs because it appears in materials, such as the rubber or plastic, which does not lead very well loads , so that you are stuck. So, when these insulating materials are rubbed against each other, build up your static charge. But, why?An explanation "nanometer"
The researchers were studying the flexoelectricidad and wondered if this could explain the relationship between friction and load. This phenomenon is the appearance of spontaneous electric fields when it occurs the bending of the materials on a nanometer scale, provided that this occurs continuously but irregularly, more or less as would occur if the deslizase a finger by the teeth of a plastic comb.
The key is that on the nanometer scale, until the object the more smooth is stroke by lumps and ridges. In this case, the researchers discovered that when two objects are rubbed together, their small bumps are bent. And it is because of this that it builds up a static charge.
According to the results of the researchers, the plastics are especially effective at generating static electricity. In addition, their work could help engineers to optimize materials in order to produce more static electricity and make use of it for things like "wearables", small portable devices. Finally, have pointed out that their findings will help to improve the security in places like refineries, where a simple spark can cause an accident.Date Of Update: 15 September 2019, 19:00