What are the advantages of silica gel desiccant?
Silica gel is a highly active adsorbent material, usually made by reacting sodium silicate with sulfuric acid, and after a series of post-treatment processes such as aging and acid bubbles. Silica gel is amorphous State, its chemical formula is mSiO₂·nH₂O. Do not dissolve in water and any solvents, non-toxic and odorless, chemically stable, except for strong alkali and hydrofluoric acid, do not react with any substance. Comply with Chinese chemical standard HG/T2765-2005. It is the only desiccant approved by FDA that can directly contact with food and medicine. Therefore, it can be in direct contact with any objects.
The main component of silica gel desiccant is silica, which has stable chemical properties and does not burn. It is a highly active adsorbent material, which is refined or processed into granules or beads by natural minerals. As a desiccant, its microporous structure (average 2 nm) has good affinity for water molecules. The most suitable hygroscopic environment for silica gel is room temperature (20-32) and high humidity (60-90%). It can reduce the relative humidity of the environment to about 40%, so the application range of silica gel desiccant is very wide. At the same time, the chemical and physical structural stability of silica gel determines that it has the characteristics that other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.
The advantage of silica gel desiccant is a physical adsorption desiccant, which relies on its internal pores to absorb moisture in the air, and locks the moisture firmly inside, even after it is filled with water, the appearance is also There will be no change, and the silicone surface is still dry.
1. Silica gel has the characteristics of non-deliquescent, non-corrosive and insoluble in water.
2. Silica gel is tasteless and odorless and poses no threat to health.
3. Even after absorbing water, silica gel still keeps the surface desiccant.
4. Has stable physical and chemical properties.