With the improvement of living standards, people pay more and more attention to the harm of electromagnetic radiation, and various radiation-proof clothes appear on the market. No matter which material is used, these clothes claim to have radiation protection. For example, recently, many manufacturers and distributors of radiation-proof clothing (fabrics) have played the slogan of "silver ion radiation protection". Let's see if silver ions have radiation protection function.

2 the principle of radiation protection

Whether clothing (fabric) has radiation protection function should be discussed from the principle of radiation protection of clothing (fabric). Radiation protection is electromagnetic shielding, that is, limiting electromagnetic waves within a certain range (or outside) by certain means. If the clothing or fabric has shielding function, the most common and effective method is to add conductive materials to the clothing fabric and reflect electromagnetic waves by using the reflection principle.

The process of reflection principle is that when the external magnetic field interacts with the fabric with conductive materials, an induced current will be generated inside the fabric, and the induced current will also generate an induced magnetic field with the same energy and opposite direction as the external magnetic field, which can just offset the external magnetic field, thus realizing electromagnetic shielding.

3 the principle of conduction

As can be seen from the above text, electrical conductivity plays a vital role in radiation-proof fabrics and clothing. Without conductivity, there is no condition for the reflection principle to occur, and there is no radiation protection. In this case, it is necessary to talk about the principle of conduction.

In principle, it mainly includes three forms of conduction: the directional movement of free electrons (such as metal conduction), the directional movement of anion and cation (such as sodium chloride solution conduction) and semiconductor conduction.

Conductivity of silver and silver ions

As a simple substance, metallic silver is the best conductive material in nature. Because of the large molecular weight of silver and many orbits of electrons, the outermost electrons are easily bound by the nucleus, forming "free electrons" that move freely. The conductivity of silver is due to the directional motion of these free charges under the action of voltage.

Silver ions are formed by chemical reactions that make silver atoms lose their outer electrons, and the remaining electrons are not easy to get rid of the constraints of atomic nuclei to form free electrons, so they do not have electrical conductivity.

5 conclusion

Because silver ion is not conductive, the concept of "silver ion radiation protection" is not established.

Silver fiber is a new type of fiber with a layer of pure silver tightly wrapped on the surface of the fiber through a special process, and its functional component is elemental silver. Therefore, silver fiber has conductivity, and weaving silver fiber into fabric can make fabric have good conductivity, thus realizing electromagnetic shielding function.

6 supplement-nano silver material

Nano-silver materials penetrate silver ions into fabrics through nanotechnology, with the purpose of increasing the surface area of silver ions, but the materials themselves are not conductive, so they cannot be used as radiation protection materials.

Note: Only when silver ions are in a liquid solvent, and there are negative ions corresponding to silver ions (positive ions) in the solvent, and they are dissociated and balanced, the positive and negative ions can move qualitatively under the action of voltage, thus conducting electricity.