Under what circumstances is it easy to generate static electricity?

The air humidity is low, the weather is dry, and there are few water molecules, which are easy to produce.

material

Theoretically, as long as the two sides of friction are compared, one side is more likely to lose electrons, and the other side is more likely to gain electrons, and the friction of two different materials can generate static electricity!

In daily life, people often accumulate static electricity because of contact friction with underwear, carpets, cushions and wallpaper made of chemical fiber. There is a high electrostatic voltage around people, and the static electricity generated by electrical equipment itself also makes space static electricity randomly exist in the air. According to the calculation of professional organizations, walking indoors may generate 6000 volts, and wiping your ass on a chair will generate more than 1800 volts, and when you hear the crack, it is already tens of thousands of volts. Generally, when the electrostatic voltage reaches 2000 volts, fingers will feel it; Sparks appear when it exceeds 3000 volts, and fingers feel like needles. When it exceeds 7000 volts, people will feel an electric shock.

The results show that the order of triboelectrification of different substances is as follows:

+air → hand → asbestos → rabbit hair → glass → mica → human hair → nylon → wool → lead → silk → aluminum → cotton → steel → wood → amber → wax → hard rubber → nickel/copper → brass/silver → gold/platinum → sulfur → rayon → polyester → celluloid → nylon → polyurethane.