What is silica gel? Why use silica gel as the main raw material?

Silica gel is a kind of highly active adsorption material, the main component is silica, it is a kind of highly active adsorption material. It is usually prepared by reacting sodium silicate with sulfuric acid and undergoing a series of post-treatment processes such as aging and acid foaming. Silica gel is an amorphous substance, its shape is transparent and irregular sphere, and its chemical formula is mSiO2·nH2O. The chemical composition and physical structure of silica gel determine that it has many characteristics that other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Silica gel desiccant has a very fine pore network structure. These pores can absorb water and retain water through its physical attraction. As a desiccant, it is widely used in aviation parts, computer devices, electronic products, and leather products. , Medicine, food and other industries dry and moisture-proof. Even if the silica gel desiccant is completely immersed in water, it will not soften or liquefy.

It has the characteristics of non-toxic, odorless, non-corrosive and non-polluting, so it can be in direct contact with any object. The most suitable hygroscopic environment for silica gel desiccant is room temperature (20~32℃) and high temperature (60~90℃). It can reduce the relative humidity of the environment to about 40%, so the application range of desiccant is very wide.

The safety performance of silica gel: silica gel can have a drying effect on human skin. Therefore, you should wear work clothes during operation. If silica gel gets into the eyes, rinse with plenty of water and seek medical treatment as soon as possible. Silica gel desiccant is the only desiccant that has passed the US FDA certification and can be used directly in contact with food and medicine. After accidental ingestion, it will not cause harm to the human body, nor will it be absorbed by the human body, and it can be naturally excreted with the feces.