What causes static electricity in hair?

There are two reasons why hair has static electricity:

First, the surrounding environment is dry and cold, and the friction between clothes and hair will generate static electricity.

Second, the hair is short of water. The lack of water may be a problem of the hair quality itself, or it may be the influence of the external environment.

Extended information

There are two hazards of static electricity:

First, the hazard is mainly the interaction of charged objects. When the aircraft body rubs against air, water vapor, dust and other particles, the aircraft will be charged. If no measures are taken, it will seriously interfere with the normal operation of the aircraft's radio equipment and make the aircraft deaf and blind;

In a printing factory, the static electricity between the pages will cause the pages to stick together, making it difficult to separate them, causing trouble for printing; in a pharmaceutical factory, due to static electricity attracting dust, the medicine will not reach the standard purity; When the TV is on, the static electricity on the surface of the screen can easily absorb dust and oil, forming a thin film of dust, which reduces the clarity and brightness of the image. Dust that is common on blended clothes but difficult to remove is also caused by static electricity.

Second, static sparks ignite certain flammable objects and cause explosions. In the dark night, when people take off nylon and woolen clothes, they will emit sparks and "bah" sounds, which are basically harmless to the human body. However, on the operating table, electric sparks can cause the explosion of anesthetics, injuring doctors and patients; in coal mines, they can cause gas explosions, which can lead to the death and injury of workers and the scrapping of mines.

In short, electrostatic hazards are caused by electricity and static sparks. The most serious electrostatic hazards, electrostatic discharge, cause fires and explosions of combustibles. It is often said that measures to prevent problems before they occur and prevent the generation of static electricity are generally to reduce the flow rate and flow rate, modify the process links that generate strong electricity, and use equipment and materials with less electricity. The simplest and most reliable way is to ground the device with a wire, which can introduce electric charge into the earth and avoid static electricity accumulation.

Reference: Baidu Encyclopedia entry static electricity