Electrostatic voltage up to tens of thousands of volts principle analysis

People in the carpet or sofa stand up, the human body voltage can be as high as 10,000 volts, and the rubber and plastic film industry electrostatic can be as high as more than 100,000 volts. So, why is the voltage of static electricity so high? The following author from the electrostatic generation principle began to analyze.
A The principle of electrostatic generation
The process of electrostatic generation is actually the process of the electric friction, and the friction does not create the charge, but the electron transfer process. The electrons lose their positive charge and the electrons get negatively charged.
Why can electrons be transferred? Because matter is made up of molecules or atoms, and the molecule is composed of atoms, there are atoms in the body. Outside the nucleus there are electrons orbiting the nucleus at high speed, and these electrons are in different energy states. A small amount of electrons in the matter are in the state of the highest energy, and the highest energy values of the electrons are different for different substances. The highest energy value of the electrons of substance a is greater than the highest energy value of material B, and when A and B come into contact with each other at the molecular magnitude (distance less than 25x10-10m), the electrons in a will escape from the surface and enter B. Thus a with a positive charge, B with negative.
The effect of friction is to increase the area and the probability of contact between the two substances, increasing the heat movement of atoms and promoting the transfer of electrons.
Two High-pressure principle of electrostatic
Contact voltage a loses electrons with a positive charge, and B gets negatively charged electrons, forming an electric field. As shown in the figure, because of the effect of electric field forces, the warmth is concentrated on the relative surface. This electric field strengthens as electrons move from a to B and hinders further movement of electrons until it is balanced. At this time a, b constitute a capacitor, and there is a voltage U0, because A, B is close to the molecular magnitude, it is called U0 for contact voltage.
Since the charge of each electron is very small (1.6x10-19c), and enters B's
Electrons are also very limited, so AB has very little charge (usually micro-Coulomb), because
The contact voltage is also very small.
The separation voltage is composed of ab capacitor with charge q, voltage u
And the relationship between the capacitor is u=q/c, and the electric C (in parallel plate capacitor for example, c=εs/4πκd) and the distance between the two poles is inversely proportional, so the voltage between the two plates and distance in proportion, when the two poles close contact, its distance in the 25x10-10m around the contact voltage is very small, When the distance between the two plates increases, the voltage will also increase, when the distance increases to 1cm, if the charge is unchanged, the distance will increase to 4 million times times the original, and the capacitance will be reduced to one of the original 4 million, and the voltage will increase to 4 million times times the original. So even if the original contact voltage is only 0.01 volts, and now the voltage will be larger to 40,000 volts. This is the reason why the electrostatic voltage is high.
From the above analysis, it can be seen that the high-voltage characteristics of electrostatic is not derived from the charge, but from the capacitance, resulting in the two bodies contact friction and then separation, that is, the separation voltage.
Although the electrostatic voltage increases as the capacitance becomes smaller, it does not increase indefinitely, because when it reaches a certain value, a corona discharge occurs between the air and the voltage is no longer raised.